Runtime assertions for Ruby
literal.fun
ruby
Raise Literal::ArgumentError in tag_for, type_of, and resolve when no match found
+6
-6
+3
-3
lib/literal/types/tagged_union_type.rb
+3
-3
lib/literal/types/tagged_union_type.rb
···
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def tag_for(value)
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@members.each { |tag, type| return tag if type === value }
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-
nil
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+
raise Literal::ArgumentError.new("No tag found for #{value.inspect} in #{inspect}.")
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end
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def type_of(value)
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@members.each_value { |type| return type if type === value }
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-
nil
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+
raise Literal::ArgumentError.new("No type found for #{value.inspect} in #{inspect}.")
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end
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def resolve(value)
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@members.each { |tag, type| return tag, type if type === value }
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nil
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+
raise Literal::ArgumentError.new("No match found for #{value.inspect} in #{inspect}.")
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end
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def >=(other)
+3
-3
test/types/_tagged_union.test.rb
+3
-3
test/types/_tagged_union.test.rb
···
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21
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assert_equal type.tag_for("Alice"), :name
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assert_equal type.tag_for(42), :age
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-
assert_equal type.tag_for(:other), nil
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+
assert_raises(Literal::ArgumentError) { type.tag_for(:other) }
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end
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test "#type_of" do
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assert_equal type.type_of("Alice"), String
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assert_equal type.type_of(42), Integer
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-
assert_equal type.type_of(:other), nil
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+
assert_raises(Literal::ArgumentError) { type.type_of(:other) }
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end
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test "#resolve" do
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assert_equal type.resolve("Alice"), [:name, String]
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assert_equal type.resolve(42), [:age, Integer]
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assert_equal type.resolve(:other), nil
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+
assert_raises(Literal::ArgumentError) { type.resolve(:other) }
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end
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test "#inspect" do