Organize tools and move Python tests into tools/tests

tools/tests/test_npc_baseline.py

@@ -0,0 +1,41 @@
+import os
+import tempfile
+import unittest
+from pathlib import Path
+
+import npc_baseline
+
+
+class NpcBaselineTests(unittest.TestCase):
+    def test_expected_files_cover_all_variants_and_views(self):
+        rows = npc_baseline.expected_files()
+        self.assertEqual(len(rows), 48)
+        self.assertEqual({row[0] for row in rows}, set(npc_baseline.VARIANTS))
+        self.assertEqual({row[1] for row in rows}, set(npc_baseline.VIEWS))
+        self.assertEqual(len({row[2] for row in rows}), 48)
+
+    def test_sheet_accepts_a_custom_view_list(self):
+        from PIL import Image
+        with tempfile.TemporaryDirectory() as tmp:
+            folder = Path(tmp)
+            for variant in npc_baseline.VARIANTS:
+                for view in ("idle", "sit"):
+                    Image.new("RGB", (32, 18), (40, 60, 80)).save(
+                        folder / f"{variant}__{view}.png")
+            out = npc_baseline.build_sheet(folder, folder / "sheet.jpg", ["idle", "sit"])
+            with Image.open(out) as sheet:
+                # 2 views x 320 px cells.
+                self.assertEqual(sheet.width, 640)
+
+    def test_latest_capture_prefers_the_full_stem(self):
+        with tempfile.TemporaryDirectory() as tmp:
+            folder = Path(tmp)
+            (folder / "npc_casual__front.png").write_bytes(b"old")
+            newer = folder / "npc_casual__front-v2.png"
+            newer.write_bytes(b"new")
+            os.utime(newer, (2_000_000_000, 2_000_000_000))
+            self.assertEqual(npc_baseline.latest_for(folder, "npc_casual__front"), newer)
+
+
+if __name__ == "__main__":
+    unittest.main()