[AZ-152] Add test infrastructure: pytest conftest, fixtures, constants patching

Made-with: Cursor

tests/test_infrastructure.py

@@ -0,0 +1,59 @@
+import constants as c
+
+
+def test_fixture_images_dir_has_jpegs(fixture_images_dir):
+    jpgs = list(fixture_images_dir.glob("*.jpg"))
+    assert len(jpgs) == 100
+
+
+def test_fixture_labels_dir_has_yolo_labels(fixture_labels_dir):
+    txts = list(fixture_labels_dir.glob("*.txt"))
+    assert len(txts) == 100
+
+
+def test_fixture_onnx_model_bytes(fixture_onnx_model):
+    assert len(fixture_onnx_model) > 0
+
+
+def test_fixture_classes_json_exists(fixture_classes_json):
+    assert fixture_classes_json.is_file()
+    assert fixture_classes_json.name == "classes.json"
+
+
+def test_work_dir_layout(work_dir):
+    assert (work_dir / "images").is_dir()
+    assert (work_dir / "labels").is_dir()
+
+
+def test_sample_image_label_paths(sample_image_label):
+    img, lbl = sample_image_label
+    assert img.suffix.lower() == ".jpg"
+    assert lbl.suffix == ".txt"
+    assert img.exists() and lbl.exists()
+    assert img.stem == lbl.stem
+
+
+def test_sample_images_labels_factory(sample_images_labels):
+    img_dir, lbl_dir = sample_images_labels(3)
+    assert len(list(img_dir.glob("*.jpg"))) == 3
+    assert len(list(lbl_dir.glob("*.txt"))) == 3
+
+
+def test_corrupted_label_content(corrupted_label):
+    text = corrupted_label.read_text(encoding="utf-8")
+    assert "1.5" in text
+
+
+def test_edge_bbox_label_exists(edge_bbox_label):
+    assert edge_bbox_label.read_text(encoding="utf-8").strip()
+
+
+def test_empty_label_file(empty_label):
+    assert empty_label.read_text(encoding="utf-8") == ""
+
+
+def test_constants_patch_uses_tmp(constants_patch, tmp_path):
+    constants_patch(tmp_path)
+    assert c.azaion.startswith(str(tmp_path))
+    assert c.data_dir.startswith(str(tmp_path))
+    assert c.CURRENT_ONNX_MODEL.startswith(str(tmp_path))