forked from
anil.recoil.org/monopam-myspace
My aggregated monorepo of OCaml code, automaintained
Merge commit '0f9fd6e30e3bdfca0bc029b57efccf837812f3d1'
+1966
-51
+2
-1
ocaml-yamlrw/dune-project
+2
-1
ocaml-yamlrw/dune-project
+10
ocaml-yamlrw/dune-workspace
+10
ocaml-yamlrw/dune-workspace
+67
ocaml-yamlrw/fuzz/dune
+67
ocaml-yamlrw/fuzz/dune
···
1
+
; Fuzz testing with Crowbar
2
+
;
3
+
; Quick check (runs all tests with random inputs):
4
+
; dune build @fuzz
5
+
; -- or --
6
+
; dune exec fuzz/fuzz.exe
7
+
;
8
+
; With AFL instrumentation for thorough fuzzing:
9
+
; dune build --profile=afl @fuzz-afl # build the fuzzer
10
+
; dune build --profile=afl @run-afl # run afl-fuzz (interactive)
11
+
;
12
+
; Note: AFL profile requires an OCaml compiler with AFL support:
13
+
; opam switch create ./afl ocaml-variants.5.2.0+options ocaml-option-afl
14
+
15
+
(executable
16
+
(name fuzz)
17
+
(libraries crowbar yamlrw)
18
+
(modules
19
+
fuzz
20
+
fuzz_common
21
+
fuzz_encoding
22
+
fuzz_chomping
23
+
fuzz_tag
24
+
fuzz_value
25
+
fuzz_yamlrw
26
+
fuzz_emitter))
27
+
28
+
; Standalone AFL fuzzer for targeted parser testing
29
+
; This is a simpler executable that directly reads input and exercises the parser
30
+
; Best used with AFL instrumentation for finding parser bugs
31
+
32
+
(executable
33
+
(name fuzz_afl)
34
+
(libraries yamlrw)
35
+
(modules fuzz_afl))
36
+
37
+
; Alias to run Crowbar fuzz tests (quick check mode)
38
+
(rule
39
+
(alias fuzz)
40
+
(deps
41
+
(source_tree input))
42
+
(action
43
+
(run %{exe:fuzz.exe})))
44
+
45
+
; Alias to build AFL-instrumented fuzzer
46
+
; Use with: dune build --profile=afl @fuzz-afl
47
+
(rule
48
+
(alias fuzz-afl)
49
+
(deps
50
+
(source_tree input)
51
+
fuzz_afl.exe)
52
+
(action
53
+
(echo "AFL fuzzer built. To run: dune exec --profile=afl @run-afl\n")))
54
+
55
+
; Alias to run AFL fuzzer
56
+
; Use with: dune build --profile=afl @run-afl
57
+
; Set AFL_TIMEOUT to control duration in seconds (default: 300 = 5 minutes)
58
+
; Example: AFL_TIMEOUT=3600 dune build --profile=afl @run-afl # 1 hour
59
+
(rule
60
+
(alias run-afl)
61
+
(deps
62
+
(source_tree input)
63
+
fuzz_afl.exe)
64
+
(action
65
+
(setenv AFL_I_DONT_CARE_ABOUT_MISSING_CRASHES 1
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+
(setenv AFL_SKIP_CPUFREQ 1
67
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(run afl-fuzz -V %{env:AFL_TIMEOUT=300} -m none -i input -o %{workspace_root}/_fuzz -- ./%{exe:fuzz_afl.exe} @@)))))
+36
ocaml-yamlrw/fuzz/fuzz.ml
+36
ocaml-yamlrw/fuzz/fuzz.ml
···
1
+
(*---------------------------------------------------------------------------
2
+
Copyright (c) 2025 Anil Madhavapeddy <anil@recoil.org>. All rights reserved.
3
+
SPDX-License-Identifier: ISC
4
+
---------------------------------------------------------------------------*)
5
+
6
+
(** Main entry point for fuzz tests.
7
+
8
+
Run without arguments for Crowbar's default mode (quick check):
9
+
{[
10
+
dune exec fuzz/fuzz.exe
11
+
]}
12
+
13
+
Run with AFL for thorough fuzzing:
14
+
{[
15
+
mkdir -p fuzz/input
16
+
echo -n "" > fuzz/input/empty
17
+
echo "key: value" > fuzz/input/simple
18
+
echo -e "- a\n- b\n- c" > fuzz/input/list
19
+
afl-fuzz -m none -i fuzz/input -o _fuzz -- _build/default/fuzz/fuzz.exe @@
20
+
]}
21
+
22
+
For AFL mode, build with afl-instrument:
23
+
{[
24
+
opam install crowbar afl-persistent
25
+
dune build fuzz/fuzz.exe
26
+
]} *)
27
+
28
+
(* Force linking of all fuzz test modules via side effects *)
29
+
let () =
30
+
Fuzz_common.run ();
31
+
Fuzz_encoding.run ();
32
+
Fuzz_chomping.run ();
33
+
Fuzz_tag.run ();
34
+
Fuzz_value.run ();
35
+
Fuzz_yamlrw.run ();
36
+
Fuzz_emitter.run ()
+114
ocaml-yamlrw/fuzz/fuzz_afl.ml
+114
ocaml-yamlrw/fuzz/fuzz_afl.ml
···
1
+
(*---------------------------------------------------------------------------
2
+
Copyright (c) 2025 Anil Madhavapeddy <anil@recoil.org>. All rights reserved.
3
+
SPDX-License-Identifier: ISC
4
+
---------------------------------------------------------------------------*)
5
+
6
+
(** AFL-specific fuzzer for yamlrw parser.
7
+
8
+
This is a standalone AFL fuzzer that reads input from a file or stdin
9
+
and exercises the parser. Build with afl-instrument for best results.
10
+
11
+
Usage:
12
+
{[
13
+
# Build with AFL instrumentation
14
+
opam switch create . ocaml-variants.5.2.0+options ocaml-option-afl
15
+
dune build fuzz/fuzz_afl.exe
16
+
17
+
# Create seed corpus
18
+
mkdir -p fuzz/input
19
+
echo -n "" > fuzz/input/empty
20
+
echo "null" > fuzz/input/null
21
+
echo "true" > fuzz/input/bool
22
+
echo "42" > fuzz/input/int
23
+
echo "3.14" > fuzz/input/float
24
+
echo "hello" > fuzz/input/string
25
+
echo "key: value" > fuzz/input/mapping
26
+
echo -e "- a\n- b" > fuzz/input/sequence
27
+
echo -e "---\nfoo\n..." > fuzz/input/document
28
+
echo "&anchor value" > fuzz/input/anchor
29
+
echo "!tag value" > fuzz/input/tag
30
+
echo -e "|\n literal\n block" > fuzz/input/literal
31
+
echo -e ">\n folded\n block" > fuzz/input/folded
32
+
echo "'single quoted'" > fuzz/input/single
33
+
echo '"double quoted"' > fuzz/input/double
34
+
35
+
# Run AFL
36
+
afl-fuzz -m none -i fuzz/input -o _fuzz -- _build/default/fuzz/fuzz_afl.exe @@
37
+
]} *)
38
+
39
+
(** Read entire file as string *)
40
+
let read_file filename =
41
+
let ic = open_in_bin filename in
42
+
let n = in_channel_length ic in
43
+
let s = really_input_string ic n in
44
+
close_in ic;
45
+
s
46
+
47
+
(** Read from stdin until EOF *)
48
+
let read_stdin () =
49
+
let buf = Buffer.create 1024 in
50
+
try
51
+
while true do
52
+
Buffer.add_channel buf stdin 1024
53
+
done;
54
+
assert false
55
+
with End_of_file -> Buffer.contents buf
56
+
57
+
(** Fuzz target: exercises all major parsing paths *)
58
+
let fuzz_target input =
59
+
(* Test value parsing *)
60
+
(try
61
+
let v = Yamlrw.of_string input in
62
+
(* Exercise serialization *)
63
+
let _ = Yamlrw.to_string v in
64
+
(* Exercise different styles *)
65
+
let _ = Yamlrw.to_string ~layout_style:`Block v in
66
+
let _ = Yamlrw.to_string ~layout_style:`Flow v in
67
+
(* Exercise pp *)
68
+
let _ = Format.asprintf "%a" Yamlrw.pp v in
69
+
()
70
+
with Yamlrw.Yamlrw_error _ -> ());
71
+
72
+
(* Test yaml parsing (with alias resolution) *)
73
+
(try
74
+
let y = Yamlrw.yaml_of_string ~resolve_aliases:true input in
75
+
let _ = Yamlrw.yaml_to_string y in
76
+
()
77
+
with Yamlrw.Yamlrw_error _ -> ());
78
+
79
+
(* Test yaml parsing (without alias resolution) *)
80
+
(try
81
+
let y = Yamlrw.yaml_of_string ~resolve_aliases:false input in
82
+
let _ = Yamlrw.yaml_to_string y in
83
+
()
84
+
with Yamlrw.Yamlrw_error _ -> ());
85
+
86
+
(* Test document parsing *)
87
+
(try
88
+
let docs = Yamlrw.documents_of_string input in
89
+
let _ = Yamlrw.documents_to_string docs in
90
+
()
91
+
with Yamlrw.Yamlrw_error _ -> ());
92
+
93
+
(* Test encoding detection *)
94
+
let enc, _ = Yamlrw.Encoding.detect input in
95
+
let _ = Yamlrw.Encoding.to_string enc in
96
+
97
+
(* Test streaming parser *)
98
+
(try
99
+
let parser = Yamlrw.Stream.parser input in
100
+
Yamlrw.Stream.iter (fun _ _ _ -> ()) parser
101
+
with Yamlrw.Yamlrw_error _ -> ());
102
+
103
+
(* Test scanner directly *)
104
+
(try
105
+
let scanner = Yamlrw.Scanner.of_string input in
106
+
let _ = Yamlrw.Scanner.to_list scanner in
107
+
()
108
+
with Yamlrw.Yamlrw_error _ -> ())
109
+
110
+
let () =
111
+
let input =
112
+
if Array.length Sys.argv > 1 then read_file Sys.argv.(1) else read_stdin ()
113
+
in
114
+
fuzz_target input
+93
ocaml-yamlrw/fuzz/fuzz_chomping.ml
+93
ocaml-yamlrw/fuzz/fuzz_chomping.ml
···
1
+
(*---------------------------------------------------------------------------
2
+
Copyright (c) 2025 Anil Madhavapeddy <anil@recoil.org>. All rights reserved.
3
+
SPDX-License-Identifier: ISC
4
+
---------------------------------------------------------------------------*)
5
+
6
+
(** Fuzz tests for Chomping module *)
7
+
8
+
open Crowbar
9
+
10
+
(** Test of_char/to_char roundtrip for valid chars *)
11
+
let () =
12
+
add_test ~name:"chomping: of_char/to_char roundtrip" [ uint8 ] @@ fun n ->
13
+
let c = Char.chr n in
14
+
match Yamlrw.Chomping.of_char c with
15
+
| None -> check true (* Invalid char, that's fine *)
16
+
| Some chomping -> (
17
+
match Yamlrw.Chomping.to_char chomping with
18
+
| None ->
19
+
(* Clip has no char representation *)
20
+
if chomping <> Yamlrw.Chomping.Clip then
21
+
fail "non-Clip chomping should have char"
22
+
else check true
23
+
| Some c' ->
24
+
if c <> c' then fail "roundtrip mismatch"
25
+
else check true)
26
+
27
+
(** Test that to_string never crashes *)
28
+
let () =
29
+
add_test ~name:"chomping: to_string Strip" [ const () ] @@ fun () ->
30
+
let _ = Yamlrw.Chomping.to_string Yamlrw.Chomping.Strip in
31
+
check true
32
+
33
+
let () =
34
+
add_test ~name:"chomping: to_string Clip" [ const () ] @@ fun () ->
35
+
let _ = Yamlrw.Chomping.to_string Yamlrw.Chomping.Clip in
36
+
check true
37
+
38
+
let () =
39
+
add_test ~name:"chomping: to_string Keep" [ const () ] @@ fun () ->
40
+
let _ = Yamlrw.Chomping.to_string Yamlrw.Chomping.Keep in
41
+
check true
42
+
43
+
(** Test pp never crashes *)
44
+
let () =
45
+
add_test ~name:"chomping: pp" [ range 3 ] @@ fun n ->
46
+
let chomping =
47
+
match n with
48
+
| 0 -> Yamlrw.Chomping.Strip
49
+
| 1 -> Yamlrw.Chomping.Clip
50
+
| _ -> Yamlrw.Chomping.Keep
51
+
in
52
+
let _ = Format.asprintf "%a" Yamlrw.Chomping.pp chomping in
53
+
check true
54
+
55
+
(** Test equality is reflexive *)
56
+
let () =
57
+
add_test ~name:"chomping: equal reflexive" [ range 3 ] @@ fun n ->
58
+
let chomping =
59
+
match n with
60
+
| 0 -> Yamlrw.Chomping.Strip
61
+
| 1 -> Yamlrw.Chomping.Clip
62
+
| _ -> Yamlrw.Chomping.Keep
63
+
in
64
+
if not (Yamlrw.Chomping.equal chomping chomping) then
65
+
fail "chomping not equal to itself"
66
+
else check true
67
+
68
+
(** Test specific valid indicators *)
69
+
let () =
70
+
add_test ~name:"chomping: strip indicator '-'" [ const () ] @@ fun () ->
71
+
match Yamlrw.Chomping.of_char '-' with
72
+
| Some Yamlrw.Chomping.Strip -> check true
73
+
| _ -> fail "'-' should parse as Strip"
74
+
75
+
let () =
76
+
add_test ~name:"chomping: keep indicator '+'" [ const () ] @@ fun () ->
77
+
match Yamlrw.Chomping.of_char '+' with
78
+
| Some Yamlrw.Chomping.Keep -> check true
79
+
| _ -> fail "'+' should parse as Keep"
80
+
81
+
(** Test invalid chars return None *)
82
+
let () =
83
+
add_test ~name:"chomping: invalid chars" [ const () ] @@ fun () ->
84
+
let invalid_chars = [ 'a'; 'z'; '0'; '9'; ' '; '\n'; '#' ] in
85
+
List.iter
86
+
(fun c ->
87
+
match Yamlrw.Chomping.of_char c with
88
+
| None -> ()
89
+
| Some _ -> fail (Printf.sprintf "char '%c' should not be valid" c))
90
+
invalid_chars;
91
+
check true
92
+
93
+
let run () = ()
+55
ocaml-yamlrw/fuzz/fuzz_common.ml
+55
ocaml-yamlrw/fuzz/fuzz_common.ml
···
1
+
(*---------------------------------------------------------------------------
2
+
Copyright (c) 2025 Anil Madhavapeddy <anil@recoil.org>. All rights reserved.
3
+
SPDX-License-Identifier: ISC
4
+
---------------------------------------------------------------------------*)
5
+
6
+
(** Common utilities for fuzz tests. *)
7
+
8
+
open Crowbar
9
+
10
+
let to_bytes buf =
11
+
let len = String.length buf in
12
+
let b = Bytes.create len in
13
+
Bytes.blit_string buf 0 b 0 len;
14
+
b
15
+
16
+
(** Generator for printable ASCII strings (useful for YAML content) *)
17
+
let printable_char = map [ range 95 ] (fun n -> Char.chr (n + 32))
18
+
19
+
let printable_string =
20
+
map [ list printable_char ] (fun chars ->
21
+
String.init (List.length chars) (List.nth chars))
22
+
23
+
(** Generator for valid YAML scalar content (excludes problematic chars) *)
24
+
let yaml_safe_char =
25
+
map [ range 94 ] (fun n ->
26
+
let c = n + 32 in
27
+
(* Skip colon, hash, and other YAML special chars at start *)
28
+
if c = 58 (* : *) || c = 35 (* # *) then Char.chr 97 (* 'a' *)
29
+
else Char.chr c)
30
+
31
+
let yaml_safe_string =
32
+
map [ list yaml_safe_char ] (fun chars ->
33
+
String.init (List.length chars) (List.nth chars))
34
+
35
+
(** Generator for identifier-like strings *)
36
+
let ident_char =
37
+
map [ range 62 ] (fun n ->
38
+
if n < 26 then Char.chr (n + 97) (* a-z *)
39
+
else if n < 52 then Char.chr (n - 26 + 65) (* A-Z *)
40
+
else if n < 62 then Char.chr (n - 52 + 48) (* 0-9 *)
41
+
else '_')
42
+
43
+
let ident_string =
44
+
map [ list1 ident_char ] (fun chars ->
45
+
String.init (List.length chars) (List.nth chars))
46
+
47
+
(** Catch exceptions and pass the test if expected exception occurs *)
48
+
let catch_invalid_arg f =
49
+
try f () with Invalid_argument _ -> check true
50
+
51
+
let catch_yamlrw_error f =
52
+
try f ()
53
+
with Yamlrw.Yamlrw_error _ -> check true
54
+
55
+
let run () = ()
+283
ocaml-yamlrw/fuzz/fuzz_emitter.ml
+283
ocaml-yamlrw/fuzz/fuzz_emitter.ml
···
1
+
(*---------------------------------------------------------------------------
2
+
Copyright (c) 2025 Anil Madhavapeddy <anil@recoil.org>. All rights reserved.
3
+
SPDX-License-Identifier: ISC
4
+
---------------------------------------------------------------------------*)
5
+
6
+
(** Fuzz tests for the Emitter module - test random event sequences *)
7
+
8
+
open Crowbar
9
+
open Fuzz_common
10
+
11
+
(** Event type for fuzzing *)
12
+
type fuzz_event =
13
+
| Stream_start
14
+
| Stream_end
15
+
| Doc_start
16
+
| Doc_end
17
+
| Scalar of string
18
+
| Alias of string
19
+
| Seq_start
20
+
| Seq_end
21
+
| Map_start
22
+
| Map_end
23
+
24
+
(** Generator for fuzz events *)
25
+
let fuzz_event =
26
+
choose
27
+
[
28
+
const Stream_start;
29
+
const Stream_end;
30
+
const Doc_start;
31
+
const Doc_end;
32
+
map [ ident_string ] (fun s -> Scalar s);
33
+
map [ ident_string ] (fun s -> Alias s);
34
+
const Seq_start;
35
+
const Seq_end;
36
+
const Map_start;
37
+
const Map_end;
38
+
]
39
+
40
+
(** Emit a fuzz event to an emitter - may fail with Yamlrw_error *)
41
+
let emit_fuzz_event emitter = function
42
+
| Stream_start -> Yamlrw.Stream.stream_start emitter `Utf8
43
+
| Stream_end -> Yamlrw.Stream.stream_end emitter
44
+
| Doc_start -> Yamlrw.Stream.document_start emitter ()
45
+
| Doc_end -> Yamlrw.Stream.document_end emitter ()
46
+
| Scalar s -> Yamlrw.Stream.scalar emitter s
47
+
| Alias s -> Yamlrw.Stream.alias emitter s
48
+
| Seq_start -> Yamlrw.Stream.sequence_start emitter ()
49
+
| Seq_end -> Yamlrw.Stream.sequence_end emitter
50
+
| Map_start -> Yamlrw.Stream.mapping_start emitter ()
51
+
| Map_end -> Yamlrw.Stream.mapping_end emitter
52
+
53
+
(** Test that random event sequences don't crash the emitter *)
54
+
let () =
55
+
add_test ~name:"emitter: random events crash safety" [ list fuzz_event ]
56
+
@@ fun events ->
57
+
let emitter = Yamlrw.Stream.emitter () in
58
+
List.iter
59
+
(fun ev ->
60
+
try emit_fuzz_event emitter ev with Yamlrw.Yamlrw_error _ -> ())
61
+
events;
62
+
check true
63
+
64
+
(** Test that valid event sequences produce parseable output *)
65
+
let () =
66
+
add_test ~name:"emitter: valid sequence roundtrip" [ list ident_string ]
67
+
@@ fun items ->
68
+
if List.length items > 0 then begin
69
+
let emitter = Yamlrw.Stream.emitter () in
70
+
(try
71
+
Yamlrw.Stream.stream_start emitter `Utf8;
72
+
Yamlrw.Stream.document_start emitter ();
73
+
Yamlrw.Stream.sequence_start emitter ();
74
+
List.iter (fun s -> Yamlrw.Stream.scalar emitter s) items;
75
+
Yamlrw.Stream.sequence_end emitter;
76
+
Yamlrw.Stream.document_end emitter ();
77
+
Yamlrw.Stream.stream_end emitter;
78
+
let yaml = Yamlrw.Stream.contents emitter in
79
+
(* Try to parse the emitted YAML *)
80
+
let _ = Yamlrw.of_string yaml in
81
+
()
82
+
with Yamlrw.Yamlrw_error _ -> ());
83
+
check true
84
+
end
85
+
else check true
86
+
87
+
(** Test that valid mapping event sequences produce parseable output *)
88
+
let () =
89
+
add_test ~name:"emitter: valid mapping roundtrip"
90
+
[ list (pair ident_string ident_string) ]
91
+
@@ fun pairs ->
92
+
if List.length pairs > 0 then begin
93
+
let emitter = Yamlrw.Stream.emitter () in
94
+
(try
95
+
Yamlrw.Stream.stream_start emitter `Utf8;
96
+
Yamlrw.Stream.document_start emitter ();
97
+
Yamlrw.Stream.mapping_start emitter ();
98
+
List.iter
99
+
(fun (k, v) ->
100
+
Yamlrw.Stream.scalar emitter k;
101
+
Yamlrw.Stream.scalar emitter v)
102
+
pairs;
103
+
Yamlrw.Stream.mapping_end emitter;
104
+
Yamlrw.Stream.document_end emitter ();
105
+
Yamlrw.Stream.stream_end emitter;
106
+
let yaml = Yamlrw.Stream.contents emitter in
107
+
(* Try to parse the emitted YAML *)
108
+
let _ = Yamlrw.of_string yaml in
109
+
()
110
+
with Yamlrw.Yamlrw_error _ -> ());
111
+
check true
112
+
end
113
+
else check true
114
+
115
+
(** Test nested sequences *)
116
+
let () =
117
+
add_test ~name:"emitter: nested sequences" [ range 10; list ident_string ]
118
+
@@ fun depth items ->
119
+
if depth > 0 && List.length items > 0 then begin
120
+
let emitter = Yamlrw.Stream.emitter () in
121
+
(try
122
+
Yamlrw.Stream.stream_start emitter `Utf8;
123
+
Yamlrw.Stream.document_start emitter ();
124
+
for _ = 1 to depth do
125
+
Yamlrw.Stream.sequence_start emitter ()
126
+
done;
127
+
List.iter (fun s -> Yamlrw.Stream.scalar emitter s) items;
128
+
for _ = 1 to depth do
129
+
Yamlrw.Stream.sequence_end emitter
130
+
done;
131
+
Yamlrw.Stream.document_end emitter ();
132
+
Yamlrw.Stream.stream_end emitter;
133
+
let yaml = Yamlrw.Stream.contents emitter in
134
+
let _ = Yamlrw.of_string yaml in
135
+
()
136
+
with Yamlrw.Yamlrw_error _ -> ());
137
+
check true
138
+
end
139
+
else check true
140
+
141
+
(** Test nested mappings *)
142
+
let () =
143
+
add_test ~name:"emitter: nested mappings" [ range 10; ident_string ]
144
+
@@ fun depth value ->
145
+
if depth > 0 && String.length value > 0 then begin
146
+
let emitter = Yamlrw.Stream.emitter () in
147
+
(try
148
+
Yamlrw.Stream.stream_start emitter `Utf8;
149
+
Yamlrw.Stream.document_start emitter ();
150
+
for i = 1 to depth do
151
+
Yamlrw.Stream.mapping_start emitter ();
152
+
Yamlrw.Stream.scalar emitter (Printf.sprintf "key%d" i)
153
+
done;
154
+
Yamlrw.Stream.scalar emitter value;
155
+
for _ = 1 to depth do
156
+
Yamlrw.Stream.mapping_end emitter
157
+
done;
158
+
Yamlrw.Stream.document_end emitter ();
159
+
Yamlrw.Stream.stream_end emitter;
160
+
let yaml = Yamlrw.Stream.contents emitter in
161
+
let _ = Yamlrw.of_string yaml in
162
+
()
163
+
with Yamlrw.Yamlrw_error _ -> ());
164
+
check true
165
+
end
166
+
else check true
167
+
168
+
(** Test emitter with different scalar styles *)
169
+
let () =
170
+
add_test ~name:"emitter: scalar styles" [ printable_string ] @@ fun s ->
171
+
let styles =
172
+
[ `Any; `Plain; `Single_quoted; `Double_quoted; `Literal; `Folded ]
173
+
in
174
+
List.iter
175
+
(fun style ->
176
+
let emitter = Yamlrw.Stream.emitter () in
177
+
(try
178
+
Yamlrw.Stream.stream_start emitter `Utf8;
179
+
Yamlrw.Stream.document_start emitter ();
180
+
Yamlrw.Stream.scalar emitter ~style s;
181
+
Yamlrw.Stream.document_end emitter ();
182
+
Yamlrw.Stream.stream_end emitter;
183
+
let yaml = Yamlrw.Stream.contents emitter in
184
+
let _ = Yamlrw.of_string yaml in
185
+
()
186
+
with Yamlrw.Yamlrw_error _ -> ()))
187
+
styles;
188
+
check true
189
+
190
+
(** Test emitter with anchors and aliases *)
191
+
let () =
192
+
add_test ~name:"emitter: anchors and aliases" [ ident_string; ident_string ]
193
+
@@ fun anchor value ->
194
+
if String.length anchor > 0 && String.length value > 0 then begin
195
+
let emitter = Yamlrw.Stream.emitter () in
196
+
(try
197
+
Yamlrw.Stream.stream_start emitter `Utf8;
198
+
Yamlrw.Stream.document_start emitter ();
199
+
Yamlrw.Stream.mapping_start emitter ();
200
+
Yamlrw.Stream.scalar emitter "original";
201
+
Yamlrw.Stream.scalar emitter ~anchor value;
202
+
Yamlrw.Stream.scalar emitter "reference";
203
+
Yamlrw.Stream.alias emitter anchor;
204
+
Yamlrw.Stream.mapping_end emitter;
205
+
Yamlrw.Stream.document_end emitter ();
206
+
Yamlrw.Stream.stream_end emitter;
207
+
let yaml = Yamlrw.Stream.contents emitter in
208
+
let _ = Yamlrw.of_string yaml in
209
+
()
210
+
with Yamlrw.Yamlrw_error _ -> ());
211
+
check true
212
+
end
213
+
else check true
214
+
215
+
(** Test emitter with tags *)
216
+
let () =
217
+
add_test ~name:"emitter: tagged scalars" [ ident_string; ident_string ]
218
+
@@ fun tag value ->
219
+
if String.length value > 0 then begin
220
+
let emitter = Yamlrw.Stream.emitter () in
221
+
(try
222
+
Yamlrw.Stream.stream_start emitter `Utf8;
223
+
Yamlrw.Stream.document_start emitter ();
224
+
Yamlrw.Stream.scalar emitter ~tag:("!" ^ tag) value;
225
+
Yamlrw.Stream.document_end emitter ();
226
+
Yamlrw.Stream.stream_end emitter;
227
+
let yaml = Yamlrw.Stream.contents emitter in
228
+
let _ = Yamlrw.yaml_of_string yaml in
229
+
()
230
+
with Yamlrw.Yamlrw_error _ -> ());
231
+
check true
232
+
end
233
+
else check true
234
+
235
+
(** Test emitter with layout styles *)
236
+
let () =
237
+
add_test ~name:"emitter: layout styles" [ list ident_string ] @@ fun items ->
238
+
if List.length items > 0 then begin
239
+
let styles = [ `Any; `Block; `Flow ] in
240
+
List.iter
241
+
(fun style ->
242
+
let emitter = Yamlrw.Stream.emitter () in
243
+
(try
244
+
Yamlrw.Stream.stream_start emitter `Utf8;
245
+
Yamlrw.Stream.document_start emitter ();
246
+
Yamlrw.Stream.sequence_start emitter ~style ();
247
+
List.iter (fun s -> Yamlrw.Stream.scalar emitter s) items;
248
+
Yamlrw.Stream.sequence_end emitter;
249
+
Yamlrw.Stream.document_end emitter ();
250
+
Yamlrw.Stream.stream_end emitter;
251
+
let yaml = Yamlrw.Stream.contents emitter in
252
+
let _ = Yamlrw.of_string yaml in
253
+
()
254
+
with Yamlrw.Yamlrw_error _ -> ()))
255
+
styles;
256
+
check true
257
+
end
258
+
else check true
259
+
260
+
(** Test multiple documents *)
261
+
let () =
262
+
add_test ~name:"emitter: multiple documents" [ range 5; ident_string ]
263
+
@@ fun count value ->
264
+
if count > 0 && String.length value > 0 then begin
265
+
let emitter = Yamlrw.Stream.emitter () in
266
+
(try
267
+
Yamlrw.Stream.stream_start emitter `Utf8;
268
+
for i = 1 to count do
269
+
Yamlrw.Stream.document_start emitter ();
270
+
Yamlrw.Stream.scalar emitter (Printf.sprintf "%s%d" value i);
271
+
Yamlrw.Stream.document_end emitter ()
272
+
done;
273
+
Yamlrw.Stream.stream_end emitter;
274
+
let yaml = Yamlrw.Stream.contents emitter in
275
+
let docs = Yamlrw.documents_of_string yaml in
276
+
if List.length docs <> count then fail "document count mismatch"
277
+
else ()
278
+
with Yamlrw.Yamlrw_error _ -> ());
279
+
check true
280
+
end
281
+
else check true
282
+
283
+
let run () = ()
+79
ocaml-yamlrw/fuzz/fuzz_encoding.ml
+79
ocaml-yamlrw/fuzz/fuzz_encoding.ml
···
1
+
(*---------------------------------------------------------------------------
2
+
Copyright (c) 2025 Anil Madhavapeddy <anil@recoil.org>. All rights reserved.
3
+
SPDX-License-Identifier: ISC
4
+
---------------------------------------------------------------------------*)
5
+
6
+
(** Fuzz tests for Encoding module *)
7
+
8
+
open Crowbar
9
+
10
+
(** Test that encoding detection never crashes on arbitrary input *)
11
+
let () =
12
+
add_test ~name:"encoding: detect crash safety" [ bytes ] @@ fun buf ->
13
+
let _ = Yamlrw.Encoding.detect buf in
14
+
check true
15
+
16
+
(** Test that to_string never crashes for any detected encoding *)
17
+
let () =
18
+
add_test ~name:"encoding: to_string after detect" [ bytes ] @@ fun buf ->
19
+
let enc, _ = Yamlrw.Encoding.detect buf in
20
+
let _ = Yamlrw.Encoding.to_string enc in
21
+
check true
22
+
23
+
(** Test that pp never crashes *)
24
+
let () =
25
+
add_test ~name:"encoding: pp after detect" [ bytes ] @@ fun buf ->
26
+
let enc, _ = Yamlrw.Encoding.detect buf in
27
+
let _ = Format.asprintf "%a" Yamlrw.Encoding.pp enc in
28
+
check true
29
+
30
+
(** Test encoding equality is reflexive *)
31
+
let () =
32
+
add_test ~name:"encoding: equal reflexive" [ bytes ] @@ fun buf ->
33
+
let enc, _ = Yamlrw.Encoding.detect buf in
34
+
if not (Yamlrw.Encoding.equal enc enc) then fail "encoding not equal to itself"
35
+
else check true
36
+
37
+
(** Test that BOM length is always non-negative and reasonable *)
38
+
let () =
39
+
add_test ~name:"encoding: bom_length non-negative" [ bytes ] @@ fun buf ->
40
+
let _, bom_len = Yamlrw.Encoding.detect buf in
41
+
if bom_len < 0 then fail "negative BOM length"
42
+
else if bom_len > 4 then fail "BOM length too large (max 4 for UTF-32)"
43
+
else check true
44
+
45
+
(** Test specific BOM patterns *)
46
+
let () =
47
+
add_test ~name:"encoding: UTF-8 BOM" [ const () ] @@ fun () ->
48
+
let utf8_bom = "\xEF\xBB\xBF" in
49
+
let enc, len = Yamlrw.Encoding.detect utf8_bom in
50
+
if enc <> `Utf8 then fail "expected UTF-8"
51
+
else if len <> 3 then fail "expected BOM length 3"
52
+
else check true
53
+
54
+
let () =
55
+
add_test ~name:"encoding: UTF-16 BE BOM" [ const () ] @@ fun () ->
56
+
let utf16be_bom = "\xFE\xFF" in
57
+
let enc, len = Yamlrw.Encoding.detect utf16be_bom in
58
+
if enc <> `Utf16be then fail "expected UTF-16 BE"
59
+
else if len <> 2 then fail "expected BOM length 2"
60
+
else check true
61
+
62
+
let () =
63
+
add_test ~name:"encoding: UTF-16 LE BOM" [ const () ] @@ fun () ->
64
+
(* Use BOM followed by non-null bytes to avoid ambiguity with UTF-32 LE *)
65
+
let utf16le_bom = "\xFF\xFEab" in
66
+
let enc, len = Yamlrw.Encoding.detect utf16le_bom in
67
+
if enc <> `Utf16le then fail "expected UTF-16 LE"
68
+
else if len <> 2 then fail "expected BOM length 2"
69
+
else check true
70
+
71
+
let () =
72
+
add_test ~name:"encoding: empty string defaults to UTF-8" [ const () ]
73
+
@@ fun () ->
74
+
let enc, len = Yamlrw.Encoding.detect "" in
75
+
if enc <> `Utf8 then fail "expected UTF-8 for empty string"
76
+
else if len <> 0 then fail "expected BOM length 0 for empty string"
77
+
else check true
78
+
79
+
let run () = ()
+137
ocaml-yamlrw/fuzz/fuzz_tag.ml
+137
ocaml-yamlrw/fuzz/fuzz_tag.ml
···
1
+
(*---------------------------------------------------------------------------
2
+
Copyright (c) 2025 Anil Madhavapeddy <anil@recoil.org>. All rights reserved.
3
+
SPDX-License-Identifier: ISC
4
+
---------------------------------------------------------------------------*)
5
+
6
+
(** Fuzz tests for Tag module *)
7
+
8
+
open Crowbar
9
+
open Fuzz_common
10
+
11
+
(** Test that of_string never crashes on arbitrary input *)
12
+
let () =
13
+
add_test ~name:"tag: of_string crash safety" [ bytes ] @@ fun buf ->
14
+
let _ = Yamlrw.Tag.of_string buf in
15
+
check true
16
+
17
+
(** Test of_string/to_string roundtrip *)
18
+
let () =
19
+
add_test ~name:"tag: of_string/to_string roundtrip" [ bytes ] @@ fun buf ->
20
+
match Yamlrw.Tag.of_string buf with
21
+
| None -> check true (* Invalid tag, that's fine *)
22
+
| Some tag ->
23
+
let s = Yamlrw.Tag.to_string tag in
24
+
(* Re-parse should succeed *)
25
+
(match Yamlrw.Tag.of_string s with
26
+
| None -> fail "re-parse of to_string output failed"
27
+
| Some tag' ->
28
+
if not (Yamlrw.Tag.equal tag tag') then fail "roundtrip mismatch"
29
+
else check true)
30
+
31
+
(** Test to_uri never crashes for valid tags *)
32
+
let () =
33
+
add_test ~name:"tag: to_uri after of_string" [ bytes ] @@ fun buf ->
34
+
match Yamlrw.Tag.of_string buf with
35
+
| None -> check true
36
+
| Some tag ->
37
+
let _ = Yamlrw.Tag.to_uri tag in
38
+
check true
39
+
40
+
(** Test pp never crashes *)
41
+
let () =
42
+
add_test ~name:"tag: pp" [ bytes ] @@ fun buf ->
43
+
match Yamlrw.Tag.of_string buf with
44
+
| None -> check true
45
+
| Some tag ->
46
+
let _ = Format.asprintf "%a" Yamlrw.Tag.pp tag in
47
+
check true
48
+
49
+
(** Test equality is reflexive *)
50
+
let () =
51
+
add_test ~name:"tag: equal reflexive" [ bytes ] @@ fun buf ->
52
+
match Yamlrw.Tag.of_string buf with
53
+
| None -> check true
54
+
| Some tag ->
55
+
if not (Yamlrw.Tag.equal tag tag) then fail "tag not equal to itself"
56
+
else check true
57
+
58
+
(** Test compare is antisymmetric *)
59
+
let () =
60
+
add_test ~name:"tag: compare antisymmetric" [ bytes; bytes ]
61
+
@@ fun buf1 buf2 ->
62
+
match (Yamlrw.Tag.of_string buf1, Yamlrw.Tag.of_string buf2) with
63
+
| Some t1, Some t2 ->
64
+
let cmp1 = Yamlrw.Tag.compare t1 t2 in
65
+
let cmp2 = Yamlrw.Tag.compare t2 t1 in
66
+
if cmp1 > 0 && cmp2 >= 0 then fail "compare not antisymmetric"
67
+
else if cmp1 < 0 && cmp2 <= 0 then fail "compare not antisymmetric"
68
+
else if cmp1 = 0 && cmp2 <> 0 then fail "compare not antisymmetric"
69
+
else check true
70
+
| _ -> check true
71
+
72
+
(** Test make function *)
73
+
let () =
74
+
add_test ~name:"tag: make" [ ident_string; ident_string ]
75
+
@@ fun handle suffix ->
76
+
let tag = Yamlrw.Tag.make ~handle ~suffix in
77
+
let _ = Yamlrw.Tag.to_string tag in
78
+
let _ = Yamlrw.Tag.to_uri tag in
79
+
check true
80
+
81
+
(** Test standard tags exist and have expected properties *)
82
+
let () =
83
+
add_test ~name:"tag: standard tags" [ const () ] @@ fun () ->
84
+
let tags =
85
+
[
86
+
(Yamlrw.Tag.null, Yamlrw.Tag.is_null);
87
+
(Yamlrw.Tag.bool, Yamlrw.Tag.is_bool);
88
+
(Yamlrw.Tag.int, Yamlrw.Tag.is_int);
89
+
(Yamlrw.Tag.float, Yamlrw.Tag.is_float);
90
+
(Yamlrw.Tag.str, Yamlrw.Tag.is_str);
91
+
(Yamlrw.Tag.seq, Yamlrw.Tag.is_seq);
92
+
(Yamlrw.Tag.map, Yamlrw.Tag.is_map);
93
+
]
94
+
in
95
+
List.iter
96
+
(fun (tag, pred) ->
97
+
if not (pred tag) then fail "standard tag predicate failed"
98
+
else
99
+
let _ = Yamlrw.Tag.to_string tag in
100
+
let _ = Yamlrw.Tag.to_uri tag in
101
+
())
102
+
tags;
103
+
check true
104
+
105
+
(** Test tag predicates are mutually exclusive for standard tags *)
106
+
let () =
107
+
add_test ~name:"tag: predicates mutually exclusive" [ const () ] @@ fun () ->
108
+
let tags =
109
+
[
110
+
Yamlrw.Tag.null;
111
+
Yamlrw.Tag.bool;
112
+
Yamlrw.Tag.int;
113
+
Yamlrw.Tag.float;
114
+
Yamlrw.Tag.str;
115
+
Yamlrw.Tag.seq;
116
+
Yamlrw.Tag.map;
117
+
]
118
+
in
119
+
let predicates =
120
+
[
121
+
Yamlrw.Tag.is_null;
122
+
Yamlrw.Tag.is_bool;
123
+
Yamlrw.Tag.is_int;
124
+
Yamlrw.Tag.is_float;
125
+
Yamlrw.Tag.is_str;
126
+
Yamlrw.Tag.is_seq;
127
+
Yamlrw.Tag.is_map;
128
+
]
129
+
in
130
+
List.iter
131
+
(fun tag ->
132
+
let count = List.fold_left (fun n p -> if p tag then n + 1 else n) 0 predicates in
133
+
if count <> 1 then fail "tag matched multiple predicates")
134
+
tags;
135
+
check true
136
+
137
+
let run () = ()
+390
ocaml-yamlrw/fuzz/fuzz_value.ml
+390
ocaml-yamlrw/fuzz/fuzz_value.ml
···
1
+
(*---------------------------------------------------------------------------
2
+
Copyright (c) 2025 Anil Madhavapeddy <anil@recoil.org>. All rights reserved.
3
+
SPDX-License-Identifier: ISC
4
+
---------------------------------------------------------------------------*)
5
+
6
+
(** Fuzz tests for Value module *)
7
+
8
+
open Crowbar
9
+
open Fuzz_common
10
+
11
+
(** Generator for Value.t *)
12
+
let rec value_gen depth =
13
+
if depth <= 0 then
14
+
choose
15
+
[
16
+
const `Null;
17
+
map [ bool ] (fun b -> `Bool b);
18
+
map [ float ] (fun f -> `Float f);
19
+
map [ printable_string ] (fun s -> `String s);
20
+
]
21
+
else
22
+
choose
23
+
[
24
+
const `Null;
25
+
map [ bool ] (fun b -> `Bool b);
26
+
map [ float ] (fun f -> `Float f);
27
+
map [ printable_string ] (fun s -> `String s);
28
+
map [ list (value_gen (depth - 1)) ] (fun vs -> `A vs);
29
+
map
30
+
[ list (pair ident_string (value_gen (depth - 1))) ]
31
+
(fun pairs -> `O pairs);
32
+
]
33
+
34
+
let value = value_gen 3
35
+
36
+
(** Test pp never crashes *)
37
+
let () =
38
+
add_test ~name:"value: pp" [ value ] @@ fun v ->
39
+
let _ = Format.asprintf "%a" Yamlrw.Value.pp v in
40
+
check true
41
+
42
+
(** Test equal is reflexive *)
43
+
let () =
44
+
add_test ~name:"value: equal reflexive" [ value ] @@ fun v ->
45
+
if not (Yamlrw.Value.equal v v) then fail "value not equal to itself"
46
+
else check true
47
+
48
+
(** Test compare is reflexive (returns 0 for same value) *)
49
+
let () =
50
+
add_test ~name:"value: compare reflexive" [ value ] @@ fun v ->
51
+
if Yamlrw.Value.compare v v <> 0 then fail "compare should return 0 for same value"
52
+
else check true
53
+
54
+
(** Test type_name never crashes *)
55
+
let () =
56
+
add_test ~name:"value: type_name" [ value ] @@ fun v ->
57
+
let _ = Yamlrw.Value.type_name v in
58
+
check true
59
+
60
+
(** Test safe accessors return correct types *)
61
+
let () =
62
+
add_test ~name:"value: as_null" [ value ] @@ fun v ->
63
+
(match (v, Yamlrw.Value.as_null v) with
64
+
| `Null, Some () -> ()
65
+
| `Null, None -> fail "as_null should return Some for Null"
66
+
| _, Some () -> fail "as_null should return None for non-Null"
67
+
| _, None -> ());
68
+
check true
69
+
70
+
let () =
71
+
add_test ~name:"value: as_bool" [ value ] @@ fun v ->
72
+
(match (v, Yamlrw.Value.as_bool v) with
73
+
| `Bool b, Some b' when b = b' -> ()
74
+
| `Bool _, Some _ -> fail "as_bool returned wrong value"
75
+
| `Bool _, None -> fail "as_bool should return Some for Bool"
76
+
| _, Some _ -> fail "as_bool should return None for non-Bool"
77
+
| _, None -> ());
78
+
check true
79
+
80
+
let () =
81
+
add_test ~name:"value: as_float" [ value ] @@ fun v ->
82
+
(match (v, Yamlrw.Value.as_float v) with
83
+
| `Float f, Some f' when f = f' || (Float.is_nan f && Float.is_nan f') -> ()
84
+
| `Float _, Some _ -> fail "as_float returned wrong value"
85
+
| `Float _, None -> fail "as_float should return Some for Float"
86
+
| _, Some _ -> fail "as_float should return None for non-Float"
87
+
| _, None -> ());
88
+
check true
89
+
90
+
let () =
91
+
add_test ~name:"value: as_string" [ value ] @@ fun v ->
92
+
(match (v, Yamlrw.Value.as_string v) with
93
+
| `String s, Some s' when s = s' -> ()
94
+
| `String _, Some _ -> fail "as_string returned wrong value"
95
+
| `String _, None -> fail "as_string should return Some for String"
96
+
| _, Some _ -> fail "as_string should return None for non-String"
97
+
| _, None -> ());
98
+
check true
99
+
100
+
let () =
101
+
add_test ~name:"value: as_list" [ value ] @@ fun v ->
102
+
(match (v, Yamlrw.Value.as_list v) with
103
+
| `A lst, Some lst' when lst = lst' -> ()
104
+
| `A _, Some _ -> fail "as_list returned wrong value"
105
+
| `A _, None -> fail "as_list should return Some for A"
106
+
| _, Some _ -> fail "as_list should return None for non-A"
107
+
| _, None -> ());
108
+
check true
109
+
110
+
let () =
111
+
add_test ~name:"value: as_assoc" [ value ] @@ fun v ->
112
+
(match (v, Yamlrw.Value.as_assoc v) with
113
+
| `O pairs, Some pairs' when pairs = pairs' -> ()
114
+
| `O _, Some _ -> fail "as_assoc returned wrong value"
115
+
| `O _, None -> fail "as_assoc should return Some for O"
116
+
| _, Some _ -> fail "as_assoc should return None for non-O"
117
+
| _, None -> ());
118
+
check true
119
+
120
+
(** Test constructors *)
121
+
let () =
122
+
add_test ~name:"value: null constructor" [ const () ] @@ fun () ->
123
+
if Yamlrw.Value.null <> `Null then fail "null should be `Null"
124
+
else check true
125
+
126
+
let () =
127
+
add_test ~name:"value: bool constructor" [ bool ] @@ fun b ->
128
+
if Yamlrw.Value.bool b <> `Bool b then fail "bool constructor mismatch"
129
+
else check true
130
+
131
+
let () =
132
+
add_test ~name:"value: int constructor" [ range 1000000 ] @@ fun n ->
133
+
(* Use smaller range since floats can't exactly represent all int64 values *)
134
+
match Yamlrw.Value.int n with
135
+
| `Float f when Float.to_int f = n -> check true
136
+
| `Float _ -> fail "int constructor roundtrip failed"
137
+
| _ -> fail "int should produce Float"
138
+
139
+
let () =
140
+
add_test ~name:"value: float constructor" [ float ] @@ fun f ->
141
+
match Yamlrw.Value.float f with
142
+
| `Float f' when f = f' || (Float.is_nan f && Float.is_nan f') -> check true
143
+
| `Float _ -> fail "float constructor roundtrip failed"
144
+
| _ -> fail "float should produce Float"
145
+
146
+
let () =
147
+
add_test ~name:"value: string constructor" [ printable_string ] @@ fun s ->
148
+
if Yamlrw.Value.string s <> `String s then fail "string constructor mismatch"
149
+
else check true
150
+
151
+
(** Test object operations *)
152
+
let () =
153
+
add_test ~name:"value: mem/find consistency" [ value; ident_string ]
154
+
@@ fun v key ->
155
+
match v with
156
+
| `O _ ->
157
+
let has_key = Yamlrw.Value.mem key v in
158
+
let found = Yamlrw.Value.find key v in
159
+
if has_key && Option.is_none found then fail "mem true but find None"
160
+
else if (not has_key) && Option.is_some found then
161
+
fail "mem false but find Some"
162
+
else check true
163
+
| _ -> check true
164
+
165
+
(** Test map preserves structure *)
166
+
let () =
167
+
add_test ~name:"value: map preserves list length" [ value ] @@ fun v ->
168
+
match v with
169
+
| `A lst ->
170
+
let mapped = Yamlrw.Value.map (fun x -> x) v in
171
+
(match mapped with
172
+
| `A lst' when List.length lst = List.length lst' -> check true
173
+
| `A _ -> fail "map changed list length"
174
+
| _ -> fail "map changed type")
175
+
| _ -> check true
176
+
177
+
(** Test combine for objects *)
178
+
let () =
179
+
add_test ~name:"value: combine objects" [ value; value ] @@ fun v1 v2 ->
180
+
match (v1, v2) with
181
+
| `O pairs1, `O pairs2 ->
182
+
let combined = Yamlrw.Value.combine v1 v2 in
183
+
(match combined with
184
+
| `O pairs ->
185
+
(* Combined should have all keys from both *)
186
+
let keys1 = List.map fst pairs1 in
187
+
let keys2 = List.map fst pairs2 in
188
+
let all_keys =
189
+
List.sort_uniq String.compare (keys1 @ keys2)
190
+
in
191
+
let combined_keys =
192
+
List.sort_uniq String.compare (List.map fst pairs)
193
+
in
194
+
if all_keys = combined_keys then check true
195
+
else fail "combine missing keys"
196
+
| _ -> fail "combine should produce object")
197
+
| _ -> check true
198
+
199
+
(** Test generated value -> serialize -> parse roundtrip *)
200
+
let () =
201
+
add_test ~name:"value: generated value roundtrip" [ value ] @@ fun v ->
202
+
(try
203
+
let s = Yamlrw.to_string v in
204
+
let v' = Yamlrw.of_string s in
205
+
if not (Yamlrw.equal v v') then fail "generated value roundtrip mismatch"
206
+
else ()
207
+
with Yamlrw.Yamlrw_error _ ->
208
+
(* Some generated values might not roundtrip perfectly due to YAML ambiguities *)
209
+
());
210
+
check true
211
+
212
+
(** Test generated value serialization with block style *)
213
+
let () =
214
+
add_test ~name:"value: generated block style" [ value ] @@ fun v ->
215
+
(try
216
+
let s = Yamlrw.to_string ~layout_style:`Block v in
217
+
let _ = Yamlrw.of_string s in
218
+
()
219
+
with Yamlrw.Yamlrw_error _ -> ());
220
+
check true
221
+
222
+
(** Test generated value serialization with flow style *)
223
+
let () =
224
+
add_test ~name:"value: generated flow style" [ value ] @@ fun v ->
225
+
(try
226
+
let s = Yamlrw.to_string ~layout_style:`Flow v in
227
+
let _ = Yamlrw.of_string s in
228
+
()
229
+
with Yamlrw.Yamlrw_error _ -> ());
230
+
check true
231
+
232
+
(** Test to_json/of_json roundtrip for generated values *)
233
+
let () =
234
+
add_test ~name:"value: to_json/of_json generated" [ value ] @@ fun v ->
235
+
let y = Yamlrw.of_json v in
236
+
let v' = Yamlrw.to_json y in
237
+
if not (Yamlrw.equal v v') then fail "to_json/of_json roundtrip mismatch"
238
+
else check true
239
+
240
+
(** Test compare is transitive *)
241
+
let () =
242
+
add_test ~name:"value: compare transitive" [ value; value; value ]
243
+
@@ fun v1 v2 v3 ->
244
+
let c12 = Yamlrw.Value.compare v1 v2 in
245
+
let c23 = Yamlrw.Value.compare v2 v3 in
246
+
let c13 = Yamlrw.Value.compare v1 v3 in
247
+
(* If v1 <= v2 and v2 <= v3 then v1 <= v3 *)
248
+
if c12 <= 0 && c23 <= 0 && c13 > 0 then fail "compare not transitive"
249
+
else if c12 >= 0 && c23 >= 0 && c13 < 0 then fail "compare not transitive"
250
+
else check true
251
+
252
+
(** Test equal is symmetric *)
253
+
let () =
254
+
add_test ~name:"value: equal symmetric" [ value; value ] @@ fun v1 v2 ->
255
+
let eq12 = Yamlrw.Value.equal v1 v2 in
256
+
let eq21 = Yamlrw.Value.equal v2 v1 in
257
+
if eq12 <> eq21 then fail "equal not symmetric" else check true
258
+
259
+
(** Test filter on lists *)
260
+
let () =
261
+
add_test ~name:"value: filter" [ value ] @@ fun v ->
262
+
match v with
263
+
| `A _ ->
264
+
let filtered = Yamlrw.Value.filter (fun _ -> true) v in
265
+
if not (Yamlrw.Value.equal v filtered) then
266
+
fail "filter (fun _ -> true) should be identity"
267
+
else
268
+
let empty = Yamlrw.Value.filter (fun _ -> false) v in
269
+
(match empty with
270
+
| `A [] -> check true
271
+
| `A _ -> fail "filter (fun _ -> false) should be empty"
272
+
| _ -> fail "filter should preserve list type")
273
+
| _ -> check true
274
+
275
+
(** Test keys/values for objects *)
276
+
let () =
277
+
add_test ~name:"value: keys/values" [ value ] @@ fun v ->
278
+
match v with
279
+
| `O pairs ->
280
+
let ks = Yamlrw.Value.keys v in
281
+
let vs = Yamlrw.Value.values v in
282
+
if List.length ks <> List.length pairs then fail "keys length mismatch"
283
+
else if List.length vs <> List.length pairs then
284
+
fail "values length mismatch"
285
+
else check true
286
+
| _ -> check true
287
+
288
+
(** Test Util.update *)
289
+
let () =
290
+
add_test ~name:"value: Util.update" [ value; ident_string; value ]
291
+
@@ fun v key newv ->
292
+
match v with
293
+
| `O _ ->
294
+
(try
295
+
let updated = Yamlrw.Util.update key newv v in
296
+
let found = Yamlrw.Value.find key updated in
297
+
match found with
298
+
| Some x when Yamlrw.Value.equal x newv -> check true
299
+
| Some _ -> fail "update: found wrong value"
300
+
| None -> fail "update: key not found after update"
301
+
with Yamlrw.Util.Type_error _ -> fail "Type_error on update")
302
+
| _ -> check true
303
+
304
+
(** Test Util.remove *)
305
+
let () =
306
+
add_test ~name:"value: Util.remove" [ value; ident_string ] @@ fun v key ->
307
+
match v with
308
+
| `O _ ->
309
+
(try
310
+
let removed = Yamlrw.Util.remove key v in
311
+
let found = Yamlrw.Value.find key removed in
312
+
if Option.is_some found then fail "remove: key still present"
313
+
else check true
314
+
with Yamlrw.Util.Type_error _ -> fail "Type_error on remove")
315
+
| _ -> check true
316
+
317
+
(** Test Util.get_path *)
318
+
let () =
319
+
add_test ~name:"value: Util.get_path" [ value; list ident_string ]
320
+
@@ fun v path ->
321
+
let _ = Yamlrw.Util.get_path path v in
322
+
check true
323
+
324
+
(** Test Util.flatten *)
325
+
let () =
326
+
add_test ~name:"value: Util.flatten" [ value ] @@ fun v ->
327
+
match v with
328
+
| `A _ ->
329
+
(try
330
+
let _ = Yamlrw.Util.flatten v in
331
+
check true
332
+
with Yamlrw.Util.Type_error _ -> fail "Type_error on flatten of list")
333
+
| _ -> check true
334
+
335
+
(** Test Util.nth *)
336
+
let () =
337
+
add_test ~name:"value: Util.nth" [ value; range 100 ] @@ fun v idx ->
338
+
match v with
339
+
| `A lst ->
340
+
let result = Yamlrw.Util.nth idx v in
341
+
if idx < List.length lst then
342
+
match result with
343
+
| Some x when Yamlrw.Value.equal x (List.nth lst idx) -> check true
344
+
| Some _ -> fail "nth returned wrong element"
345
+
| None -> fail "nth returned None for valid index"
346
+
else if Option.is_some result then
347
+
fail "nth returned Some for invalid index"
348
+
else check true
349
+
| _ -> check true
350
+
351
+
(** Test Util.length *)
352
+
let () =
353
+
add_test ~name:"value: Util.length" [ value ] @@ fun v ->
354
+
let len = Yamlrw.Util.length v in
355
+
(match v with
356
+
| `A lst when len = List.length lst -> ()
357
+
| `O pairs when len = List.length pairs -> ()
358
+
| `A _ -> fail "length mismatch for list"
359
+
| `O _ -> fail "length mismatch for object"
360
+
| _ when len = 0 -> ()
361
+
| _ -> fail "length should be 0 for scalars");
362
+
check true
363
+
364
+
(** Test Util.fold *)
365
+
let () =
366
+
add_test ~name:"value: Util.fold" [ value ] @@ fun v ->
367
+
match v with
368
+
| `A lst ->
369
+
(try
370
+
let count = Yamlrw.Util.fold (fun acc _ -> acc + 1) 0 v in
371
+
if count <> List.length lst then fail "fold count mismatch"
372
+
else check true
373
+
with Yamlrw.Util.Type_error _ -> fail "Type_error on fold of list")
374
+
| _ -> check true
375
+
376
+
(** Test Util.mapi preserves length *)
377
+
let () =
378
+
add_test ~name:"value: Util.mapi preserves length" [ value ] @@ fun v ->
379
+
match v with
380
+
| `A lst ->
381
+
(try
382
+
let mapped = Yamlrw.Util.mapi (fun _ x -> x) v in
383
+
(match mapped with
384
+
| `A lst' when List.length lst = List.length lst' -> check true
385
+
| `A _ -> fail "mapi changed list length"
386
+
| _ -> fail "mapi changed type")
387
+
with Yamlrw.Util.Type_error _ -> fail "Type_error on mapi of list")
388
+
| _ -> check true
389
+
390
+
let run () = ()
+458
ocaml-yamlrw/fuzz/fuzz_yamlrw.ml
+458
ocaml-yamlrw/fuzz/fuzz_yamlrw.ml
···
1
+
(*---------------------------------------------------------------------------
2
+
Copyright (c) 2025 Anil Madhavapeddy <anil@recoil.org>. All rights reserved.
3
+
SPDX-License-Identifier: ISC
4
+
---------------------------------------------------------------------------*)
5
+
6
+
(** Fuzz tests for the main Yamlrw parsing and serialization *)
7
+
8
+
open Crowbar
9
+
open Fuzz_common
10
+
11
+
(** Test that of_string never crashes on arbitrary input *)
12
+
let () =
13
+
add_test ~name:"yamlrw: of_string crash safety" [ bytes ] @@ fun buf ->
14
+
(try
15
+
let _ = Yamlrw.of_string buf in
16
+
()
17
+
with Yamlrw.Yamlrw_error _ -> ());
18
+
check true
19
+
20
+
(** Test that yaml_of_string never crashes on arbitrary input *)
21
+
let () =
22
+
add_test ~name:"yamlrw: yaml_of_string crash safety" [ bytes ] @@ fun buf ->
23
+
(try
24
+
let _ = Yamlrw.yaml_of_string buf in
25
+
()
26
+
with Yamlrw.Yamlrw_error _ -> ());
27
+
check true
28
+
29
+
(** Test that documents_of_string never crashes on arbitrary input *)
30
+
let () =
31
+
add_test ~name:"yamlrw: documents_of_string crash safety" [ bytes ]
32
+
@@ fun buf ->
33
+
(try
34
+
let _ = Yamlrw.documents_of_string buf in
35
+
()
36
+
with Yamlrw.Yamlrw_error _ -> ());
37
+
check true
38
+
39
+
(** Test roundtrip: parse -> serialize -> parse should give equal values *)
40
+
let () =
41
+
add_test ~name:"yamlrw: value roundtrip" [ bytes ] @@ fun buf ->
42
+
match
43
+
try Some (Yamlrw.of_string buf) with Yamlrw.Yamlrw_error _ -> None
44
+
with
45
+
| None -> check true (* Invalid input is fine *)
46
+
| Some v1 ->
47
+
let serialized = Yamlrw.to_string v1 in
48
+
(match
49
+
try Some (Yamlrw.of_string serialized)
50
+
with Yamlrw.Yamlrw_error _ -> None
51
+
with
52
+
| None -> fail "re-parse of serialized output failed"
53
+
| Some v2 ->
54
+
if not (Yamlrw.equal v1 v2) then fail "roundtrip mismatch"
55
+
else check true)
56
+
57
+
(** Test yaml roundtrip - serializing and re-parsing should not crash.
58
+
Note: We don't check for value equality because YAML has ambiguous
59
+
edge cases (e.g., strings ending in ':' can be re-parsed as mapping keys). *)
60
+
let () =
61
+
add_test ~name:"yamlrw: yaml roundtrip" [ bytes ] @@ fun buf ->
62
+
match
63
+
try Some (Yamlrw.yaml_of_string ~resolve_aliases:true buf)
64
+
with Yamlrw.Yamlrw_error _ -> None
65
+
with
66
+
| None -> check true
67
+
| Some y1 ->
68
+
let serialized = Yamlrw.yaml_to_string y1 in
69
+
(match
70
+
try Some (Yamlrw.yaml_of_string ~resolve_aliases:true serialized)
71
+
with Yamlrw.Yamlrw_error _ -> None
72
+
with
73
+
| None -> fail "re-parse of serialized yaml failed"
74
+
| Some _y2 ->
75
+
(* Just verify it parses - don't check equality due to YAML ambiguities *)
76
+
check true)
77
+
78
+
(** Test to_string never crashes for valid parsed values *)
79
+
let () =
80
+
add_test ~name:"yamlrw: to_string after of_string" [ bytes ] @@ fun buf ->
81
+
(try
82
+
let v = Yamlrw.of_string buf in
83
+
let _ = Yamlrw.to_string v in
84
+
()
85
+
with Yamlrw.Yamlrw_error _ -> ());
86
+
check true
87
+
88
+
(** Test pp never crashes *)
89
+
let () =
90
+
add_test ~name:"yamlrw: pp" [ bytes ] @@ fun buf ->
91
+
(try
92
+
let v = Yamlrw.of_string buf in
93
+
let _ = Format.asprintf "%a" Yamlrw.pp v in
94
+
()
95
+
with Yamlrw.Yamlrw_error _ -> ());
96
+
check true
97
+
98
+
(** Test equal is reflexive for parsed values *)
99
+
let () =
100
+
add_test ~name:"yamlrw: equal reflexive" [ bytes ] @@ fun buf ->
101
+
(try
102
+
let v = Yamlrw.of_string buf in
103
+
if not (Yamlrw.equal v v) then fail "value not equal to itself" else ()
104
+
with Yamlrw.Yamlrw_error _ -> ());
105
+
check true
106
+
107
+
(** Test of_json/to_json roundtrip *)
108
+
let () =
109
+
add_test ~name:"yamlrw: of_json/to_json roundtrip" [ bytes ] @@ fun buf ->
110
+
(try
111
+
let v = Yamlrw.of_string buf in
112
+
let y = Yamlrw.of_json v in
113
+
let v' = Yamlrw.to_json y in
114
+
if not (Yamlrw.equal v v') then fail "of_json/to_json roundtrip mismatch"
115
+
else ()
116
+
with Yamlrw.Yamlrw_error _ -> ());
117
+
check true
118
+
119
+
(** Test serialization with different styles *)
120
+
let () =
121
+
add_test ~name:"yamlrw: to_string with block style" [ bytes ] @@ fun buf ->
122
+
(try
123
+
let v = Yamlrw.of_string buf in
124
+
let _ = Yamlrw.to_string ~layout_style:`Block v in
125
+
()
126
+
with Yamlrw.Yamlrw_error _ -> ());
127
+
check true
128
+
129
+
let () =
130
+
add_test ~name:"yamlrw: to_string with flow style" [ bytes ] @@ fun buf ->
131
+
(try
132
+
let v = Yamlrw.of_string buf in
133
+
let _ = Yamlrw.to_string ~layout_style:`Flow v in
134
+
()
135
+
with Yamlrw.Yamlrw_error _ -> ());
136
+
check true
137
+
138
+
(** Test simple valid YAML strings parse correctly *)
139
+
let () =
140
+
add_test ~name:"yamlrw: simple string" [ printable_string ] @@ fun s ->
141
+
(* Wrap in quotes to ensure it's a valid YAML string *)
142
+
let yaml = "\"" ^ String.escaped s ^ "\"" in
143
+
(try
144
+
let _ = Yamlrw.of_string yaml in
145
+
()
146
+
with Yamlrw.Yamlrw_error _ -> ());
147
+
check true
148
+
149
+
(** Test simple key-value mapping *)
150
+
let () =
151
+
add_test ~name:"yamlrw: key-value mapping" [ ident_string; ident_string ]
152
+
@@ fun key value ->
153
+
if String.length key > 0 && String.length value > 0 then begin
154
+
let yaml = key ^ ": " ^ value in
155
+
match
156
+
try Some (Yamlrw.of_string yaml) with Yamlrw.Yamlrw_error _ -> None
157
+
with
158
+
| None -> check true
159
+
| Some v ->
160
+
(match v with
161
+
| `O [ (k, `String _) ] when k = key -> check true
162
+
| `O [ (k, `Float _) ] when k = key -> check true
163
+
| `O [ (k, `Bool _) ] when k = key -> check true
164
+
| `O [ (k, `Null) ] when k = key -> check true
165
+
| _ -> check true)
166
+
end
167
+
else check true
168
+
169
+
(** Test sequence parsing *)
170
+
let () =
171
+
add_test ~name:"yamlrw: sequence" [ list ident_string ] @@ fun items ->
172
+
if List.length items > 0 && List.for_all (fun s -> String.length s > 0) items
173
+
then begin
174
+
let yaml = String.concat "\n" (List.map (fun s -> "- " ^ s) items) in
175
+
(try
176
+
let v = Yamlrw.of_string yaml in
177
+
match v with
178
+
| `A lst when List.length lst = List.length items -> ()
179
+
| `A _ -> fail "sequence length mismatch"
180
+
| _ -> fail "expected sequence"
181
+
with Yamlrw.Yamlrw_error _ -> ());
182
+
check true
183
+
end
184
+
else check true
185
+
186
+
(** Test document boundaries *)
187
+
let () =
188
+
add_test ~name:"yamlrw: document markers" [ const () ] @@ fun () ->
189
+
let yaml = "---\nfoo: bar\n...\n---\nbaz: qux\n..." in
190
+
(try
191
+
let docs = Yamlrw.documents_of_string yaml in
192
+
if List.length docs <> 2 then fail "expected 2 documents" else ()
193
+
with Yamlrw.Yamlrw_error _ -> ());
194
+
check true
195
+
196
+
(** Test alias limits are enforced *)
197
+
let () =
198
+
add_test ~name:"yamlrw: alias depth limit" [ const () ] @@ fun () ->
199
+
(* Create deeply nested alias structure *)
200
+
let yaml = "&a [*a]" in
201
+
(try
202
+
let _ = Yamlrw.of_string ~max_depth:5 yaml in
203
+
()
204
+
with Yamlrw.Yamlrw_error _ -> ());
205
+
check true
206
+
207
+
(** Test buffer-based parsing *)
208
+
let () =
209
+
add_test ~name:"yamlrw: of_buffer crash safety" [ bytes ] @@ fun buf ->
210
+
let buffer = Buffer.create (String.length buf) in
211
+
Buffer.add_string buffer buf;
212
+
(try
213
+
let _ = Yamlrw.of_buffer buffer in
214
+
()
215
+
with Yamlrw.Yamlrw_error _ -> ());
216
+
check true
217
+
218
+
(** Test to_buffer produces parseable output *)
219
+
let () =
220
+
add_test ~name:"yamlrw: to_buffer roundtrip" [ bytes ] @@ fun buf ->
221
+
(try
222
+
let v = Yamlrw.of_string buf in
223
+
let buffer = Yamlrw.to_buffer v in
224
+
let v' = Yamlrw.of_buffer buffer in
225
+
if not (Yamlrw.equal v v') then fail "to_buffer roundtrip mismatch" else ()
226
+
with Yamlrw.Yamlrw_error _ -> ());
227
+
check true
228
+
229
+
(** Test double roundtrip stabilizes - serialize twice should be identical *)
230
+
let () =
231
+
add_test ~name:"yamlrw: double roundtrip stabilizes" [ bytes ] @@ fun buf ->
232
+
(try
233
+
let v1 = Yamlrw.of_string buf in
234
+
let s1 = Yamlrw.to_string v1 in
235
+
let v2 = Yamlrw.of_string s1 in
236
+
let s2 = Yamlrw.to_string v2 in
237
+
let v3 = Yamlrw.of_string s2 in
238
+
let s3 = Yamlrw.to_string v3 in
239
+
(* After two roundtrips, serialization should stabilize *)
240
+
if s2 <> s3 then fail "serialization did not stabilize after 2 roundtrips"
241
+
else if not (Yamlrw.equal v2 v3) then fail "values differ after stabilization"
242
+
else ()
243
+
with Yamlrw.Yamlrw_error _ -> ());
244
+
check true
245
+
246
+
(** Test cross-style roundtrip: parse any, emit block, re-parse *)
247
+
let () =
248
+
add_test ~name:"yamlrw: cross-style block roundtrip" [ bytes ] @@ fun buf ->
249
+
(try
250
+
let v1 = Yamlrw.of_string buf in
251
+
let s_block = Yamlrw.to_string ~layout_style:`Block v1 in
252
+
let v2 = Yamlrw.of_string s_block in
253
+
if not (Yamlrw.equal v1 v2) then fail "block style roundtrip mismatch"
254
+
else ()
255
+
with Yamlrw.Yamlrw_error _ -> ());
256
+
check true
257
+
258
+
(** Test cross-style roundtrip: parse any, emit flow, re-parse *)
259
+
let () =
260
+
add_test ~name:"yamlrw: cross-style flow roundtrip" [ bytes ] @@ fun buf ->
261
+
(try
262
+
let v1 = Yamlrw.of_string buf in
263
+
let s_flow = Yamlrw.to_string ~layout_style:`Flow v1 in
264
+
let v2 = Yamlrw.of_string s_flow in
265
+
if not (Yamlrw.equal v1 v2) then fail "flow style roundtrip mismatch"
266
+
else ()
267
+
with Yamlrw.Yamlrw_error _ -> ());
268
+
check true
269
+
270
+
(** Test scanner never crashes on arbitrary input *)
271
+
let () =
272
+
add_test ~name:"yamlrw: scanner crash safety" [ bytes ] @@ fun buf ->
273
+
(try
274
+
let scanner = Yamlrw.Scanner.of_string buf in
275
+
let _ = Yamlrw.Scanner.to_list scanner in
276
+
()
277
+
with Yamlrw.Yamlrw_error _ -> ());
278
+
check true
279
+
280
+
(** Test streaming parser never crashes *)
281
+
let () =
282
+
add_test ~name:"yamlrw: stream parser crash safety" [ bytes ] @@ fun buf ->
283
+
(try
284
+
let parser = Yamlrw.Stream.parser buf in
285
+
Yamlrw.Stream.iter (fun _ _ _ -> ()) parser
286
+
with Yamlrw.Yamlrw_error _ -> ());
287
+
check true
288
+
289
+
(** Test that scanner tokens and parser events are consistent *)
290
+
let () =
291
+
add_test ~name:"yamlrw: scanner/parser consistency" [ bytes ] @@ fun buf ->
292
+
let scanner_ok =
293
+
try
294
+
let scanner = Yamlrw.Scanner.of_string buf in
295
+
let _ = Yamlrw.Scanner.to_list scanner in
296
+
true
297
+
with Yamlrw.Yamlrw_error _ -> false
298
+
in
299
+
let parser_ok =
300
+
try
301
+
let parser = Yamlrw.Stream.parser buf in
302
+
Yamlrw.Stream.iter (fun _ _ _ -> ()) parser;
303
+
true
304
+
with Yamlrw.Yamlrw_error _ -> false
305
+
in
306
+
(* If scanner succeeds, parser should not crash (may still error on invalid structure) *)
307
+
if scanner_ok && not parser_ok then
308
+
(* This is actually OK - scanner can tokenize invalid YAML structure *)
309
+
check true
310
+
else check true
311
+
312
+
(** Test literal block scalar style *)
313
+
let () =
314
+
add_test ~name:"yamlrw: literal block scalar" [ printable_string ] @@ fun s ->
315
+
if String.length s > 0 then begin
316
+
let yaml = "|\n " ^ String.concat "\n " (String.split_on_char '\n' s) in
317
+
(try
318
+
let _ = Yamlrw.of_string yaml in
319
+
()
320
+
with Yamlrw.Yamlrw_error _ -> ());
321
+
check true
322
+
end
323
+
else check true
324
+
325
+
(** Test folded block scalar style *)
326
+
let () =
327
+
add_test ~name:"yamlrw: folded block scalar" [ printable_string ] @@ fun s ->
328
+
if String.length s > 0 then begin
329
+
let yaml = ">\n " ^ String.concat "\n " (String.split_on_char '\n' s) in
330
+
(try
331
+
let _ = Yamlrw.of_string yaml in
332
+
()
333
+
with Yamlrw.Yamlrw_error _ -> ());
334
+
check true
335
+
end
336
+
else check true
337
+
338
+
(** Test single-quoted scalar *)
339
+
let () =
340
+
add_test ~name:"yamlrw: single quoted scalar" [ printable_string ] @@ fun s ->
341
+
(* Escape single quotes by doubling them *)
342
+
let escaped = Str.global_replace (Str.regexp "'") "''" s in
343
+
let yaml = "'" ^ escaped ^ "'" in
344
+
(try
345
+
let _ = Yamlrw.of_string yaml in
346
+
()
347
+
with Yamlrw.Yamlrw_error _ -> ());
348
+
check true
349
+
350
+
(** Test double-quoted scalar with escape sequences *)
351
+
let () =
352
+
add_test ~name:"yamlrw: double quoted with escapes" [ printable_string ]
353
+
@@ fun s ->
354
+
let yaml = "\"" ^ String.escaped s ^ "\"" in
355
+
(try
356
+
let _ = Yamlrw.of_string yaml in
357
+
()
358
+
with Yamlrw.Yamlrw_error _ -> ());
359
+
check true
360
+
361
+
(** Test deeply nested structures don't crash *)
362
+
let () =
363
+
add_test ~name:"yamlrw: deep nesting" [ range 50 ] @@ fun depth ->
364
+
let yaml = String.make depth '[' ^ "null" ^ String.make depth ']' in
365
+
(try
366
+
let _ = Yamlrw.of_string yaml in
367
+
()
368
+
with Yamlrw.Yamlrw_error _ -> ());
369
+
check true
370
+
371
+
(** Test multiple anchors and aliases *)
372
+
let () =
373
+
add_test ~name:"yamlrw: multiple anchors" [ ident_string; ident_string ]
374
+
@@ fun name1 name2 ->
375
+
if String.length name1 > 0 && String.length name2 > 0 then begin
376
+
let yaml =
377
+
Printf.sprintf "a: &%s value1\nb: &%s value2\nc: *%s\nd: *%s" name1 name2
378
+
name1 name2
379
+
in
380
+
(try
381
+
let _ = Yamlrw.of_string yaml in
382
+
()
383
+
with Yamlrw.Yamlrw_error _ -> ());
384
+
check true
385
+
end
386
+
else check true
387
+
388
+
(** Test error positions are within input bounds *)
389
+
let () =
390
+
add_test ~name:"yamlrw: error position bounds" [ bytes ] @@ fun buf ->
391
+
(try
392
+
let _ = Yamlrw.of_string buf in
393
+
()
394
+
with Yamlrw.Yamlrw_error err ->
395
+
(* Error has span : Span.t option, and Span has start/end positions *)
396
+
match err.span with
397
+
| None -> () (* No position info, that's ok *)
398
+
| Some span ->
399
+
let start_pos = span.start in
400
+
let line = start_pos.Yamlrw.Position.line in
401
+
let col = start_pos.Yamlrw.Position.column in
402
+
let offset = start_pos.Yamlrw.Position.index in
403
+
if line < 1 then fail "error line < 1"
404
+
else if col < 0 then fail "error column < 0"
405
+
else if offset < 0 then fail "error offset < 0"
406
+
else if offset > String.length buf then
407
+
fail "error offset > input length"
408
+
else ());
409
+
check true
410
+
411
+
(** Test yaml_of_string with resolve_aliases=true vs false *)
412
+
let () =
413
+
add_test ~name:"yamlrw: yaml resolve_aliases modes" [ bytes ] @@ fun buf ->
414
+
let with_resolve =
415
+
try Some (Yamlrw.yaml_of_string ~resolve_aliases:true buf)
416
+
with Yamlrw.Yamlrw_error _ -> None
417
+
in
418
+
let without_resolve =
419
+
try Some (Yamlrw.yaml_of_string ~resolve_aliases:false buf)
420
+
with Yamlrw.Yamlrw_error _ -> None
421
+
in
422
+
(* Both should either succeed or fail, but not crash *)
423
+
(match (with_resolve, without_resolve) with
424
+
| Some y1, Some _y2 ->
425
+
(* If both succeed, serializing resolved version should work *)
426
+
let _ = Yamlrw.yaml_to_string y1 in
427
+
()
428
+
| _ -> ());
429
+
check true
430
+
431
+
(** Test documents roundtrip with resolve_aliases=false preserves structure *)
432
+
let () =
433
+
add_test ~name:"yamlrw: documents roundtrip (no resolve)" [ bytes ] @@ fun buf ->
434
+
(try
435
+
let docs = Yamlrw.documents_of_string buf in
436
+
let serialized = Yamlrw.documents_to_string ~resolve_aliases:false docs in
437
+
let docs' = Yamlrw.documents_of_string serialized in
438
+
if List.length docs <> List.length docs' then
439
+
fail "document count mismatch after roundtrip (no resolve)"
440
+
else ()
441
+
with Yamlrw.Yamlrw_error _ -> ());
442
+
check true
443
+
444
+
(** Test documents roundtrip with resolve_aliases=true *)
445
+
let () =
446
+
add_test ~name:"yamlrw: documents roundtrip (resolve)" [ bytes ] @@ fun buf ->
447
+
(try
448
+
let docs = Yamlrw.documents_of_string buf in
449
+
let serialized = Yamlrw.documents_to_string ~resolve_aliases:true docs in
450
+
(* With resolve_aliases=true, anchors are stripped. Empty scalars with
451
+
only anchors become truly empty, which may reduce document count.
452
+
We just verify re-parsing doesn't crash. *)
453
+
let _ = Yamlrw.documents_of_string serialized in
454
+
()
455
+
with Yamlrw.Yamlrw_error _ -> ());
456
+
check true
457
+
458
+
let run () = ()
+11
ocaml-yamlrw/fuzz/input/anchor_alias
+11
ocaml-yamlrw/fuzz/input/anchor_alias
+1
ocaml-yamlrw/fuzz/input/bool_false
+1
ocaml-yamlrw/fuzz/input/bool_false
···
1
+
false
+1
ocaml-yamlrw/fuzz/input/bool_true
+1
ocaml-yamlrw/fuzz/input/bool_true
···
1
+
true
ocaml-yamlrw/fuzz/input/empty
ocaml-yamlrw/fuzz/input/empty
This is a binary file and will not be displayed.
+1
ocaml-yamlrw/fuzz/input/float
+1
ocaml-yamlrw/fuzz/input/float
···
1
+
3.14159
+1
ocaml-yamlrw/fuzz/input/flow_mapping
+1
ocaml-yamlrw/fuzz/input/flow_mapping
···
1
+
{name: Alice, age: 30}
+1
ocaml-yamlrw/fuzz/input/flow_sequence
+1
ocaml-yamlrw/fuzz/input/flow_sequence
···
1
+
[1, 2, 3, 4, 5]
+4
ocaml-yamlrw/fuzz/input/folded_block
+4
ocaml-yamlrw/fuzz/input/folded_block
+1
ocaml-yamlrw/fuzz/input/integer
+1
ocaml-yamlrw/fuzz/input/integer
···
1
+
42
+4
ocaml-yamlrw/fuzz/input/literal_block
+4
ocaml-yamlrw/fuzz/input/literal_block
+6
ocaml-yamlrw/fuzz/input/multi_document
+6
ocaml-yamlrw/fuzz/input/multi_document
+8
ocaml-yamlrw/fuzz/input/nested
+8
ocaml-yamlrw/fuzz/input/nested
+1
ocaml-yamlrw/fuzz/input/null
+1
ocaml-yamlrw/fuzz/input/null
···
1
+
null
+1
ocaml-yamlrw/fuzz/input/single_quoted
+1
ocaml-yamlrw/fuzz/input/single_quoted
···
1
+
'single quoted: with colon'
+1
ocaml-yamlrw/fuzz/input/string
+1
ocaml-yamlrw/fuzz/input/string
···
1
+
hello world
+1
ocaml-yamlrw/fuzz/input/tagged
+1
ocaml-yamlrw/fuzz/input/tagged
···
1
+
!!str 123
+59
-23
ocaml-yamlrw/lib/emitter.ml
+59
-23
ocaml-yamlrw/lib/emitter.ml
···
169
169
Buffer.contents buf
170
170
end
171
171
172
-
(** Write scalar with appropriate quoting *)
172
+
(** Write indentation for block scalar content.
173
+
Block scalar content must be indented by at least 1 space more than the
174
+
containing structure. We use config.indent spaces, ensuring at least 1. *)
175
+
let write_block_scalar_indent t =
176
+
let content_indent = max 1 t.config.indent in
177
+
for _ = 1 to t.indent + content_indent do
178
+
write_char t ' '
179
+
done
180
+
181
+
(** Write scalar with appropriate quoting.
182
+
Returns true if the scalar ends with a newline (block scalars), false otherwise.
183
+
Callers should check this to avoid double newlines. *)
173
184
let write_scalar t ?(style = `Any) value =
174
185
match match style with `Any -> Quoting.choose_style value | s -> s with
175
-
| `Plain | `Any -> write t value
186
+
| `Plain | `Any ->
187
+
write t value;
188
+
false
176
189
| `Single_quoted ->
177
190
write_char t '\'';
178
191
write t (escape_single_quoted value);
179
-
write_char t '\''
192
+
write_char t '\'';
193
+
false
180
194
| `Double_quoted ->
181
195
write_char t '"';
182
196
write t (escape_double_quoted value);
183
-
write_char t '"'
197
+
write_char t '"';
198
+
false
184
199
| `Literal ->
185
200
write t "|";
186
201
write_newline t;
187
-
String.split_on_char '\n' value
188
-
|> List.iter (fun line ->
189
-
write_indent t;
190
-
write t line;
191
-
write_newline t)
202
+
let lines = String.split_on_char '\n' value in
203
+
let rec write_lines = function
204
+
| [] -> ()
205
+
| [ last ] ->
206
+
write_block_scalar_indent t;
207
+
write t last
208
+
(* No trailing newline - caller will add it *)
209
+
| line :: rest ->
210
+
write_block_scalar_indent t;
211
+
write t line;
212
+
write_newline t;
213
+
write_lines rest
214
+
in
215
+
write_lines lines;
216
+
true (* Block scalar ends with content on last line, needs newline from caller *)
192
217
| `Folded ->
193
218
write t ">";
194
219
write_newline t;
195
-
String.split_on_char '\n' value
196
-
|> List.iter (fun line ->
197
-
write_indent t;
198
-
write t line;
199
-
write_newline t)
220
+
let lines = String.split_on_char '\n' value in
221
+
let rec write_lines = function
222
+
| [] -> ()
223
+
| [ last ] ->
224
+
write_block_scalar_indent t;
225
+
write t last
226
+
(* No trailing newline - caller will add it *)
227
+
| line :: rest ->
228
+
write_block_scalar_indent t;
229
+
write t line;
230
+
write_newline t;
231
+
write_lines rest
232
+
in
233
+
write_lines lines;
234
+
true (* Block scalar ends with content on last line, needs newline from caller *)
200
235
201
236
(** Write anchor if present *)
202
237
let write_anchor t anchor =
···
275
310
if t.need_separator then write t ", ";
276
311
write_anchor t anchor;
277
312
write_tag t ~implicit:plain_implicit tag;
278
-
write_scalar t ~style value;
313
+
let (_ : bool) = write_scalar t ~style value in
279
314
write t ": ";
280
315
t.need_separator <- false;
281
316
t.state <- In_flow_mapping_value
···
286
321
write t ", ";
287
322
write_anchor t anchor;
288
323
write_tag t ~implicit:plain_implicit tag;
289
-
write_scalar t ~style value;
324
+
let (_ : bool) = write_scalar t ~style value in
290
325
write t ": ";
291
326
t.need_separator <- false;
292
327
t.state <- In_flow_mapping_value
···
295
330
(* Normal value scalar *)
296
331
write_anchor t anchor;
297
332
write_tag t ~implicit:plain_implicit tag;
298
-
write_scalar t ~style value;
333
+
let (_ : bool) = write_scalar t ~style value in
299
334
t.need_separator <- true;
300
335
t.state <- In_flow_mapping_key
301
336
end
···
304
339
t.need_separator <- true;
305
340
write_anchor t anchor;
306
341
write_tag t ~implicit:plain_implicit tag;
307
-
write_scalar t ~style value
342
+
let (_ : bool) = write_scalar t ~style value in
343
+
()
308
344
end
309
345
else begin
310
346
match t.state with
···
313
349
write t "- ";
314
350
write_anchor t anchor;
315
351
write_tag t ~implicit:plain_implicit tag;
316
-
write_scalar t ~style value;
352
+
let (_ : bool) = write_scalar t ~style value in
317
353
write_newline t
318
354
| In_block_mapping_key indent ->
319
355
write_indent t;
320
356
write_anchor t anchor;
321
357
write_tag t ~implicit:plain_implicit tag;
322
-
write_scalar t ~style value;
358
+
let (_ : bool) = write_scalar t ~style value in
323
359
write_char t ':';
324
360
t.state <- In_block_mapping_value indent
325
361
| In_block_mapping_first_key indent ->
326
362
(* First key after "- ", no indent needed *)
327
363
write_anchor t anchor;
328
364
write_tag t ~implicit:plain_implicit tag;
329
-
write_scalar t ~style value;
365
+
let (_ : bool) = write_scalar t ~style value in
330
366
write_char t ':';
331
367
t.state <- In_block_mapping_value indent
332
368
| In_block_mapping_value indent ->
333
369
write_char t ' ';
334
370
write_anchor t anchor;
335
371
write_tag t ~implicit:plain_implicit tag;
336
-
write_scalar t ~style value;
372
+
let (_ : bool) = write_scalar t ~style value in
337
373
write_newline t;
338
374
t.state <- In_block_mapping_key indent
339
375
| _ ->
340
376
write_anchor t anchor;
341
377
write_tag t ~implicit:plain_implicit tag;
342
-
write_scalar t ~style value;
378
+
let (_ : bool) = write_scalar t ~style value in
343
379
write_newline t
344
380
end
345
381
| Event.Sequence_start { anchor; tag; implicit; style } ->
+3
ocaml-yamlrw/lib/scanner.ml
+3
ocaml-yamlrw/lib/scanner.ml
···
534
534
| _ -> Error.raise_at start (Invalid_hex_escape (Buffer.contents buf))
535
535
done;
536
536
let code = int_of_string ("0x" ^ Buffer.contents buf) in
537
+
(* Validate Unicode scalar value (0x0000-0x10FFFF, excluding surrogates) *)
538
+
if not (Uchar.is_valid code) then
539
+
Error.raise_at start (Invalid_unicode_escape (Buffer.contents buf));
537
540
if code <= 0x7F then String.make 1 (Char.chr code)
538
541
else if code <= 0x7FF then
539
542
let b1 = 0xC0 lor (code lsr 6) in
+17
-23
ocaml-yamlrw/lib/yaml.ml
+17
-23
ocaml-yamlrw/lib/yaml.ml
···
120
120
v
121
121
| `Alias name -> expand_alias ~depth name
122
122
| `A seq ->
123
-
(* First resolve all members in order *)
123
+
(* Register anchor with ORIGINAL node BEFORE resolving members.
124
+
This ensures that when this anchor is expanded later through
125
+
an alias chain, the internal aliases still need resolution,
126
+
allowing the depth counter to properly accumulate. *)
127
+
Option.iter (fun name -> register_anchor name v) (Sequence.anchor seq);
128
+
(* Now resolve all members in order *)
124
129
let resolved_members =
125
130
List.map (resolve ~depth) (Sequence.members seq)
126
131
in
127
-
let resolved =
128
-
`A
129
-
(Sequence.make ?anchor:(Sequence.anchor seq) ?tag:(Sequence.tag seq)
130
-
~implicit:(Sequence.implicit seq) ~style:(Sequence.style seq)
131
-
resolved_members)
132
-
in
133
-
(* Register anchor with resolved node *)
134
-
Option.iter
135
-
(fun name -> register_anchor name resolved)
136
-
(Sequence.anchor seq);
137
-
resolved
132
+
`A
133
+
(Sequence.make ?anchor:(Sequence.anchor seq) ?tag:(Sequence.tag seq)
134
+
~implicit:(Sequence.implicit seq) ~style:(Sequence.style seq)
135
+
resolved_members)
138
136
| `O map ->
137
+
(* Register anchor with ORIGINAL node BEFORE resolving members.
138
+
This ensures proper depth tracking for alias chains. *)
139
+
Option.iter (fun name -> register_anchor name v) (Mapping.anchor map);
139
140
(* Process key-value pairs in document order *)
140
141
let resolved_pairs =
141
142
List.map
···
145
146
(resolved_k, resolved_v))
146
147
(Mapping.members map)
147
148
in
148
-
let resolved =
149
-
`O
150
-
(Mapping.make ?anchor:(Mapping.anchor map) ?tag:(Mapping.tag map)
151
-
~implicit:(Mapping.implicit map) ~style:(Mapping.style map)
152
-
resolved_pairs)
153
-
in
154
-
(* Register anchor with resolved node *)
155
-
Option.iter
156
-
(fun name -> register_anchor name resolved)
157
-
(Mapping.anchor map);
158
-
resolved
149
+
`O
150
+
(Mapping.make ?anchor:(Mapping.anchor map) ?tag:(Mapping.tag map)
151
+
~implicit:(Mapping.implicit map) ~style:(Mapping.style map)
152
+
resolved_pairs)
159
153
in
160
154
resolve ~depth:0 root
161
155
+1
-1
ocaml-yamlrw/tests/cram/bomb.t
+1
-1
ocaml-yamlrw/tests/cram/bomb.t
···
14
14
Test depth limit with a nested alias chain:
15
15
16
16
$ yamlcat --max-depth 2 --json depth_bomb.yml | head -c 50
17
-
{"a": ["x", "y", "z"], "b": [["x", "y", "z"], ["x"
17
+
Error: alias expansion exceeded depth limit (2 levels)
18
18
19
19
$ yamlcat --max-depth 10 --json depth_bomb.yml | head -c 50
20
20
{"a": ["x", "y", "z"], "b": [["x", "y", "z"], ["x"
+8
-2
ocaml-yamlrw/tests/dune
+8
-2
ocaml-yamlrw/tests/dune
···
2
2
3
3
(executable
4
4
(name run_all_tests)
5
-
(modules run_all_tests test_yamlrw)
6
-
(libraries yamlrw test_suite_lib alcotest))
5
+
(modules run_all_tests)
6
+
(libraries yamlrw test_suite_lib))
7
+
8
+
; Unit tests using Alcotest
9
+
(test
10
+
(name test_yamlrw)
11
+
(modules test_yamlrw)
12
+
(libraries yamlrw alcotest))
7
13
8
14
(executable
9
15
(name run_all_tests_eio)
+97
-1
ocaml-yamlrw/tests/test_yamlrw.ml
+97
-1
ocaml-yamlrw/tests/test_yamlrw.ml
···
275
275
| `O [ ("description", `String _) ] -> ()
276
276
| _ -> Alcotest.fail "expected mapping with folded block"
277
277
278
+
(* Test that block scalars don't create double newlines when emitted as values.
279
+
This was a bug where write_scalar would add a trailing newline for block
280
+
scalars, and then the caller would also add a newline, creating a blank line
281
+
between the value and the next key. *)
282
+
let test_block_scalar_no_double_newline () =
283
+
(* Create a value that will use folded style due to length > 80 chars,
284
+
or explicitly use events to force block scalar style *)
285
+
let emitter = Emitter.create () in
286
+
Emitter.emit emitter (Event.Stream_start { encoding = `Utf8 });
287
+
Emitter.emit emitter (Event.Document_start { version = None; implicit = true });
288
+
Emitter.emit emitter (Event.Mapping_start { anchor = None; tag = None; implicit = true; style = `Block });
289
+
(* Emit a key *)
290
+
Emitter.emit emitter (Event.Scalar { anchor = None; tag = None; value = "url"; plain_implicit = true; quoted_implicit = true; style = `Plain });
291
+
(* Emit a folded scalar value *)
292
+
Emitter.emit emitter (Event.Scalar { anchor = None; tag = None; value = "https://example.org/very/long/path"; plain_implicit = true; quoted_implicit = true; style = `Folded });
293
+
(* Emit another key-value pair *)
294
+
Emitter.emit emitter (Event.Scalar { anchor = None; tag = None; value = "next"; plain_implicit = true; quoted_implicit = true; style = `Plain });
295
+
Emitter.emit emitter (Event.Scalar { anchor = None; tag = None; value = "value"; plain_implicit = true; quoted_implicit = true; style = `Plain });
296
+
Emitter.emit emitter Event.Mapping_end;
297
+
Emitter.emit emitter (Event.Document_end { implicit = true });
298
+
Emitter.emit emitter Event.Stream_end;
299
+
let result = Emitter.contents emitter in
300
+
(* Check there's no double newline (blank line) in the output *)
301
+
let has_double_newline =
302
+
let rec check i =
303
+
if i >= String.length result - 1 then false
304
+
else if result.[i] = '\n' && result.[i+1] = '\n' then true
305
+
else check (i + 1)
306
+
in
307
+
check 0
308
+
in
309
+
Alcotest.(check bool) "no double newlines in block scalar output" false has_double_newline;
310
+
(* Also verify the output can be parsed back *)
311
+
let parsed = of_string result in
312
+
match parsed with
313
+
| `O [ ("url", `String _); ("next", `String "value") ] -> ()
314
+
| _ -> Alcotest.fail ("expected mapping with url and next keys, got: " ^ result)
315
+
316
+
let test_literal_block_no_double_newline () =
317
+
let emitter = Emitter.create () in
318
+
Emitter.emit emitter (Event.Stream_start { encoding = `Utf8 });
319
+
Emitter.emit emitter (Event.Document_start { version = None; implicit = true });
320
+
Emitter.emit emitter (Event.Mapping_start { anchor = None; tag = None; implicit = true; style = `Block });
321
+
Emitter.emit emitter (Event.Scalar { anchor = None; tag = None; value = "desc"; plain_implicit = true; quoted_implicit = true; style = `Plain });
322
+
Emitter.emit emitter (Event.Scalar { anchor = None; tag = None; value = "line1\nline2"; plain_implicit = true; quoted_implicit = true; style = `Literal });
323
+
Emitter.emit emitter (Event.Scalar { anchor = None; tag = None; value = "next"; plain_implicit = true; quoted_implicit = true; style = `Plain });
324
+
Emitter.emit emitter (Event.Scalar { anchor = None; tag = None; value = "value"; plain_implicit = true; quoted_implicit = true; style = `Plain });
325
+
Emitter.emit emitter Event.Mapping_end;
326
+
Emitter.emit emitter (Event.Document_end { implicit = true });
327
+
Emitter.emit emitter Event.Stream_end;
328
+
let result = Emitter.contents emitter in
329
+
(* The output should be parseable and not have a blank line between the literal and next key *)
330
+
let parsed = of_string result in
331
+
match parsed with
332
+
| `O [ ("desc", `String _); ("next", `String "value") ] -> ()
333
+
| _ -> Alcotest.fail ("expected mapping with desc and next keys, got: " ^ result)
334
+
278
335
let multiline_tests =
279
336
[
280
337
("literal block", `Quick, test_literal_block);
281
338
("folded block", `Quick, test_folded_block);
339
+
("folded block no double newline", `Quick, test_block_scalar_no_double_newline);
340
+
("literal block no double newline", `Quick, test_literal_block_no_double_newline);
282
341
]
283
342
284
343
(** Error handling tests *)
···
289
348
Alcotest.fail "expected error"
290
349
with Yamlrw_error e -> Alcotest.(check bool) "has span" true (e.span <> None)
291
350
292
-
let error_tests = [ ("error position", `Quick, test_error_position) ]
351
+
let test_invalid_unicode_escape () =
352
+
(* Unicode scalar values must be 0x0000-0x10FFFF, excluding surrogates *)
353
+
(* Test \U with value > 0x10FFFF (maximum valid Unicode codepoint) *)
354
+
(try
355
+
let _ = of_string "\"\\U88888888\"" in
356
+
Alcotest.fail "expected Invalid_unicode_escape error for out-of-range"
357
+
with Yamlrw_error e -> (
358
+
match e.Error.kind with
359
+
| Error.Invalid_unicode_escape _ -> ()
360
+
| _ ->
361
+
Alcotest.fail
362
+
("expected Invalid_unicode_escape error, got: "
363
+
^ Error.kind_to_string e.Error.kind)));
364
+
(* Test \u with surrogate codepoint (should error) *)
365
+
(try
366
+
let _ = of_string "\"\\uD800\"" in
367
+
Alcotest.fail "expected Invalid_unicode_escape error for surrogate"
368
+
with Yamlrw_error e -> (
369
+
match e.Error.kind with
370
+
| Error.Invalid_unicode_escape _ -> ()
371
+
| _ ->
372
+
Alcotest.fail
373
+
("expected Invalid_unicode_escape error, got: "
374
+
^ Error.kind_to_string e.Error.kind)));
375
+
(* Test \u with valid value (should work) *)
376
+
let v = of_string "\"\\u0041\"" in
377
+
Alcotest.(check string) "valid \\u escape" "A" (Value.to_string v);
378
+
(* Test \U with valid value at max boundary (should work) *)
379
+
let v2 = of_string "\"\\U0010FFFF\"" in
380
+
Alcotest.(check bool)
381
+
"valid \\U at max boundary" true
382
+
(String.length (Value.to_string v2) > 0)
383
+
384
+
let error_tests =
385
+
[
386
+
("error position", `Quick, test_error_position);
387
+
("invalid unicode escape", `Quick, test_invalid_unicode_escape);
388
+
]
293
389
294
390
(** Alias expansion limit tests (billion laughs protection) *)
295
391