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tessera-geotessera: add fetch_mosaic_sync
Add end-to-end test for fetch_mosaic_sync using mock fetch function
with numpy fixture files. Verifies the full pipeline: bbox -> tile
enumeration -> fetch -> dequantize -> mosaic -> correct output values.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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tessera-geotessera/test/fixtures/mock_emb.npy
tessera-geotessera/test/fixtures/mock_emb.npy
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tessera-geotessera/test/fixtures/mock_scales.npy
tessera-geotessera/test/fixtures/mock_scales.npy
This is a binary file and will not be displayed.
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tessera-geotessera/test/test_geotessera.ml
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tessera-geotessera/test/test_geotessera.ml
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(* South tile should be at row offset 2*2=4 in flat index: pixel (2,0) -> row 2*2+0=4 *)
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Alcotest.(check (float eps)) "south at bottom" 2.0 (Linalg.mat_get result 4 0));
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]);
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("fetch_mosaic_sync", [
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Alcotest.test_case "single tile end to end" `Quick (fun () ->
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(* Load mock fixture bytes *)
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let read f = In_channel.with_open_bin f In_channel.input_all in
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let emb_bytes = read "fixtures/mock_emb.npy" in
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let scales_bytes = read "fixtures/mock_scales.npy" in
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(* Mock fetch: return fixture bytes for any URL *)
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let fetch url =
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if String.ends_with ~suffix:"_scales.npy" url then scales_bytes
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else emb_bytes
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in
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(* Single-tile bbox *)
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let bbox : Geotessera.bbox = {
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min_lon = 0.12; min_lat = 52.12;
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max_lon = 0.18; max_lat = 52.18;
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} in
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let (result, rh, rw) = Geotessera.fetch_mosaic_sync
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~fetch ~base_url:"http://mock" ~version:"v1" ~year:2021 bbox in
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(* tile is 2x2 with 2 features *)
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Alcotest.(check int) "h" 2 rh;
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Alcotest.(check int) "w" 2 rw;
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Alcotest.(check int) "rows" 4 result.Linalg.rows;
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Alcotest.(check int) "cols" 2 result.Linalg.cols;
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(* pixel(0,0): [10*0.1, 20*0.1] = [1.0, 2.0] *)
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let eps = 1e-5 in
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Alcotest.(check (float eps)) "p00_f0" 1.0 (Linalg.mat_get result 0 0);
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Alcotest.(check (float eps)) "p00_f1" 2.0 (Linalg.mat_get result 0 1);
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(* pixel(0,1): [30*0.2, 40*0.2] = [6.0, 8.0] *)
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Alcotest.(check (float eps)) "p01_f0" 6.0 (Linalg.mat_get result 1 0);
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Alcotest.(check (float eps)) "p01_f1" 8.0 (Linalg.mat_get result 1 1));
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]);
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]