Test files and initial data gathering completed

tests/test_corrupt.py

@@ -0,0 +1,10 @@
+from pathlib import Path
+
+import analyze
+
+CORRUPT = sorted(Path("tests/images/corrupt").glob("*.png"))
+
+
+def test_corrupt_images_are_skipped_gracefully():
+    for path in CORRUPT:
+        assert analyze.load_image(path) is None, path