First commit with entire first rendition of the project

tests/conftest.py

@@ -0,0 +1,65 @@
+import io
+import json
+import os
+import tempfile
+from pathlib import Path
+
+import pytest
+from PIL import Image as PILImage
+
+from spectra.web.server import create_app
+
+
+TEST_IMAGE_SIZE = (800, 600)
+
+
+@pytest.fixture
+def app():
+    with tempfile.TemporaryDirectory() as tmpdir:
+        tmp = Path(tmpdir)
+        cache_dir = tmp / "cache"
+
+        old_environ = os.environ.get("SPECTRA_CACHE_DIR")
+        os.environ["SPECTRA_CACHE_DIR"] = str(cache_dir)
+
+        app = create_app()
+
+        yield app
+
+        if old_environ is None:
+            os.environ.pop("SPECTRA_CACHE_DIR", None)
+        else:
+            os.environ["SPECTRA_CACHE_DIR"] = old_environ
+
+
+@pytest.fixture
+def client(app):
+    return app.test_client()
+
+
+@pytest.fixture
+def sample_image_bytes():
+    img = PILImage.new("RGB", TEST_IMAGE_SIZE, color=(100, 150, 200))
+    buf = io.BytesIO()
+    img.save(buf, format="JPEG")
+    buf.seek(0)
+    return buf
+
+
+@pytest.fixture
+def uploaded_image(client, sample_image_bytes):
+    resp = client.post(
+        "/api/images",
+        data={"file": (sample_image_bytes, "test.jpg")},
+        content_type="multipart/form-data",
+    )
+    assert resp.status_code == 201
+    return resp.get_json()
+
+
+def make_image_bytes(width, height, color=(100, 150, 200), fmt="JPEG"):
+    img = PILImage.new("RGB", (width, height), color=color)
+    buf = io.BytesIO()
+    img.save(buf, format=fmt)
+    buf.seek(0)
+    return buf, img