amayer5125 is savage

tests/conftest.py

@@ -0,0 +1,56 @@
+import struct
+import zlib
+from pathlib import Path
+
+import pytest
+
+import imagepipeline.modules  # noqa: F401
+
+
+def make_png(
+    path: Path,
+    width: int = 2,
+    height: int = 2,
+    rgb: tuple[int, int, int] = (200, 100, 50),
+) -> None:
+    """Write a minimal valid PNG without external dependencies."""
+    r, g, b = rgb
+
+    def chunk(tag: bytes, data: bytes) -> bytes:
+        crc = zlib.crc32(tag + data) & 0xFFFFFFFF
+        return struct.pack(">I", len(data)) + tag + data + struct.pack(">I", crc)
+
+    raw = b"".join(
+        b"\x00" + bytes([r, g, b] * width)
+        for _ in range(height)
+    )
+    compressed = zlib.compress(raw, 9)
+    ihdr = struct.pack(">IIBBBBB", width, height, 8, 2, 0, 0, 0)
+    png = (
+        b"\x89PNG\r\n\x1a\n"
+        + chunk(b"IHDR", ihdr)
+        + chunk(b"IDAT", compressed)
+        + chunk(b"IEND", b"")
+    )
+    path.write_bytes(png)
+
+
+@pytest.fixture(autouse=True)
+def _ensure_builtin_modules() -> None:
+    import imagepipeline.modules  # noqa: F401
+
+
+@pytest.fixture
+def input_dir(tmp_path: Path) -> Path:
+    directory = tmp_path / "input"
+    directory.mkdir()
+    make_png(directory / "photo_a.png")
+    make_png(directory / "photo_b.png", rgb=(10, 20, 30))
+    return directory
+
+
+@pytest.fixture
+def output_base(tmp_path: Path) -> Path:
+    base = tmp_path / "output"
+    base.mkdir()
+    return base