32eb02ccb6
- "engine/presets/sign.json" - "engine/presets/patch.json" - "engine/presets/stencil.json" - "engine/presets/detailed.json" - "engine/presets/custom.json" - "engine/presets/loader.py" - "engine/api/routes.py" - "engine/tests/test_presets.py" GSD-Task: S03/T01
290 lines
10 KiB
Python
290 lines
10 KiB
Python
"""Tests for the preset system — loader, GET /engine/presets, and preset-driven trace."""
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import json
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import cv2
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import numpy as np
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import pytest
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from fastapi.testclient import TestClient
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from main import app
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from presets.loader import all_presets, get_preset, preset_names, reload, resolve_params
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client = TestClient(app)
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def _make_test_png(width: int = 100, height: int = 100) -> bytes:
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"""Create a simple test PNG with a white rectangle on black background."""
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img = np.zeros((height, width, 3), dtype=np.uint8)
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cv2.rectangle(img, (20, 20), (80, 80), (255, 255, 255), -1)
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ok, buf = cv2.imencode(".png", img)
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assert ok
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return buf.tobytes()
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@pytest.fixture
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def test_png() -> bytes:
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return _make_test_png()
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# -----------------------------------------------------------------------
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# Preset Loader Unit Tests
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# -----------------------------------------------------------------------
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class TestPresetLoader:
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"""Tests for the preset loading and resolution logic."""
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def test_all_presets_loads_five(self):
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reload()
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presets = all_presets()
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assert len(presets) == 5
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assert set(presets.keys()) == {"sign", "patch", "stencil", "detailed", "custom"}
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def test_preset_names_sorted(self):
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reload()
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names = preset_names()
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assert names == sorted(names)
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assert "sign" in names
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assert "custom" in names
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def test_get_preset_returns_config(self):
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reload()
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sign = get_preset("sign")
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assert sign is not None
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assert sign["name"] == "sign"
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assert "preprocessing" in sign
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assert "vectorization" in sign
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assert "postprocessing" in sign
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def test_get_preset_unknown_returns_none(self):
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reload()
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assert get_preset("nonexistent") is None
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def test_sign_preset_has_aggressive_simplification(self):
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reload()
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sign = get_preset("sign")
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assert sign["postprocessing"]["epsilon"] > 1.0
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assert sign["preprocessing"]["morph_kernel_size"] >= 5
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def test_detailed_preset_has_low_simplification(self):
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reload()
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detailed = get_preset("detailed")
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assert detailed["postprocessing"]["epsilon"] < 1.0
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assert detailed["vectorization"]["potrace"]["turdsize"] <= 2
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def test_stencil_preset_has_manual_threshold(self):
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reload()
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stencil = get_preset("stencil")
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assert stencil["preprocessing"]["threshold_manual"] is not None
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def test_custom_preset_has_empty_params(self):
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reload()
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custom = get_preset("custom")
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assert custom["preprocessing"] == {}
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assert custom["vectorization"]["potrace"] == {}
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def test_each_preset_has_description(self):
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reload()
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for name, config in all_presets().items():
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assert "description" in config, f"Preset {name} missing description"
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assert len(config["description"]) > 0
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# -----------------------------------------------------------------------
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# Preset Resolution Tests
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# -----------------------------------------------------------------------
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class TestPresetResolution:
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"""Tests for resolve_params merging logic."""
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def test_resolve_uses_preset_defaults(self):
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reload()
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resolved = resolve_params("sign")
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assert resolved["vectorization_mode"] == "potrace"
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assert resolved["postprocessing"]["epsilon"] == 2.5
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assert resolved["preprocessing"]["morph_kernel_size"] == 5
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def test_resolve_user_override_epsilon(self):
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reload()
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resolved = resolve_params("sign", {"epsilon": 0.5})
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assert resolved["postprocessing"]["epsilon"] == 0.5
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def test_resolve_user_override_mode(self):
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reload()
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resolved = resolve_params("sign", {"mode": "vtracer"})
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assert resolved["vectorization_mode"] == "vtracer"
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def test_resolve_user_override_vectorizer_param(self):
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reload()
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resolved = resolve_params("sign", {"turdsize": 99})
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assert resolved["vectorizer_params"]["turdsize"] == 99
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def test_resolve_custom_preset_falls_through(self):
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reload()
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resolved = resolve_params("custom", {"epsilon": 3.0, "turdsize": 5})
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assert resolved["postprocessing"]["epsilon"] == 3.0
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def test_resolve_unknown_preset_uses_user_params(self):
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resolved = resolve_params("nonexistent", {"mode": "vtracer", "epsilon": 2.0})
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assert resolved["vectorization_mode"] == "vtracer"
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assert resolved["postprocessing"]["epsilon"] == 2.0
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# -----------------------------------------------------------------------
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# GET /engine/presets Endpoint Tests
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# -----------------------------------------------------------------------
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class TestPresetsEndpoint:
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"""Tests for the GET /engine/presets endpoint."""
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def test_get_presets_returns_all(self):
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resp = client.get("/engine/presets")
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assert resp.status_code == 200
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body = resp.json()
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assert "presets" in body
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presets = body["presets"]
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assert len(presets) == 5
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assert "sign" in presets
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assert "patch" in presets
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assert "stencil" in presets
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assert "detailed" in presets
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assert "custom" in presets
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def test_preset_structure(self):
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resp = client.get("/engine/presets")
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body = resp.json()
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for name, config in body["presets"].items():
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assert "name" in config
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assert "description" in config
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assert "preprocessing" in config
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assert "vectorization" in config
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assert "postprocessing" in config
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# -----------------------------------------------------------------------
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# Preset-Driven Trace Endpoint Tests
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# -----------------------------------------------------------------------
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class TestPresetTrace:
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"""Tests for /engine/trace with preset selection."""
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def test_trace_with_sign_preset(self, test_png):
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resp = client.post(
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"/engine/trace",
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files={"file": ("test.png", test_png, "image/png")},
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data={"preset": "sign"},
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)
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assert resp.status_code == 200
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body = resp.json()
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assert body["format"] == "svg"
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assert "<svg" in body["output"]
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def test_trace_with_detailed_preset(self, test_png):
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resp = client.post(
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"/engine/trace",
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files={"file": ("test.png", test_png, "image/png")},
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data={"preset": "detailed"},
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)
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assert resp.status_code == 200
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body = resp.json()
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assert body["format"] == "svg"
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def test_trace_with_stencil_preset(self, test_png):
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resp = client.post(
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"/engine/trace",
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files={"file": ("test.png", test_png, "image/png")},
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data={"preset": "stencil"},
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)
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assert resp.status_code == 200
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def test_trace_with_patch_preset(self, test_png):
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resp = client.post(
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"/engine/trace",
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files={"file": ("test.png", test_png, "image/png")},
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data={"preset": "patch"},
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)
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assert resp.status_code == 200
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def test_trace_with_custom_preset(self, test_png):
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resp = client.post(
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"/engine/trace",
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files={"file": ("test.png", test_png, "image/png")},
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data={"preset": "custom"},
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)
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assert resp.status_code == 200
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def test_trace_unknown_preset_rejected(self, test_png):
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resp = client.post(
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"/engine/trace",
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files={"file": ("test.png", test_png, "image/png")},
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data={"preset": "nonexistent"},
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)
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assert resp.status_code == 422
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assert "nonexistent" in resp.json()["detail"]
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def test_preset_with_mode_override(self, test_png):
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resp = client.post(
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"/engine/trace",
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files={"file": ("test.png", test_png, "image/png")},
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data={"preset": "sign", "mode": "vtracer"},
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)
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assert resp.status_code == 200
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def test_preset_with_params_override(self, test_png):
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resp = client.post(
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"/engine/trace",
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files={"file": ("test.png", test_png, "image/png")},
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data={
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"preset": "sign",
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"params": json.dumps({"epsilon": 0.1, "turdsize": 1}),
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},
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)
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assert resp.status_code == 200
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def test_presets_produce_different_node_counts(self, test_png):
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"""Different presets should produce different outputs from the same input.
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Sign uses aggressive simplification (epsilon=2.5) while
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detailed uses minimal simplification (epsilon=0.5). With a complex
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enough image, the node counts should differ.
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"""
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# Build a complex test image with circles, lines, and noise —
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# simple rectangles have too few nodes for RDP differences to show.
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img = np.zeros((200, 200, 3), dtype=np.uint8)
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cv2.circle(img, (100, 100), 80, (255, 255, 255), 2)
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cv2.circle(img, (100, 100), 40, (255, 255, 255), 2)
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cv2.line(img, (20, 20), (180, 180), (255, 255, 255), 1)
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cv2.line(img, (180, 20), (20, 180), (255, 255, 255), 1)
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cv2.ellipse(img, (100, 100), (90, 50), 45, 0, 360, (255, 255, 255), 1)
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# Add some speckle noise
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for x in range(10, 190, 15):
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for y in range(10, 190, 15):
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cv2.circle(img, (x, y), 1, (255, 255, 255), -1)
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ok, buf = cv2.imencode(".png", img)
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assert ok
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complex_png = buf.tobytes()
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results = {}
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for preset_name in ("sign", "detailed", "stencil"):
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resp = client.post(
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"/engine/trace",
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files={"file": ("test.png", complex_png, "image/png")},
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data={"preset": preset_name},
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)
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assert resp.status_code == 200
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body = resp.json()
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results[preset_name] = body["metadata"]["node_count_total"]
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# Not all three can be equal — at least one pair must differ
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values = list(results.values())
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assert not (values[0] == values[1] == values[2]), (
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f"All presets produced identical node counts: {results}"
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)
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def test_default_preset_is_sign(self, test_png):
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"""When no preset is specified, 'sign' is used."""
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resp = client.post(
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"/engine/trace",
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files={"file": ("test.png", test_png, "image/png")},
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)
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assert resp.status_code == 200
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