prvni commit

tests/test_snapshot.py

@@ -0,0 +1,39 @@
+import tempfile
+import unittest
+from datetime import datetime, time
+from pathlib import Path
+from zoneinfo import ZoneInfo
+
+import snapshot
+
+
+class ScheduleTests(unittest.TestCase):
+    def test_day_window(self):
+        now = datetime(2026, 7, 30, 12, 0, tzinfo=ZoneInfo("Europe/Prague"))
+        self.assertTrue(snapshot.is_active(now, time(6), time(20)))
+        self.assertFalse(snapshot.is_active(now, time(13), time(20)))
+
+    def test_overnight_window(self):
+        late = datetime(2026, 7, 30, 23, 0, tzinfo=ZoneInfo("Europe/Prague"))
+        noon = datetime(2026, 7, 30, 12, 0, tzinfo=ZoneInfo("Europe/Prague"))
+        self.assertTrue(snapshot.is_active(late, time(20), time(6)))
+        self.assertFalse(snapshot.is_active(noon, time(20), time(6)))
+
+    def test_equal_times_mean_all_day(self):
+        now = datetime(2026, 7, 30, 12, 0, tzinfo=ZoneInfo("Europe/Prague"))
+        self.assertTrue(snapshot.is_active(now, time(0), time(0)))
+
+
+class FileTests(unittest.TestCase):
+    def test_atomic_copy_replaces_destination(self):
+        with tempfile.TemporaryDirectory() as directory:
+            root = Path(directory)
+            source = root / "dummy.jpg"
+            destination = root / "web" / "camera.jpg"
+            source.write_bytes(b"dummy")
+            snapshot.atomic_copy(source, destination)
+            self.assertEqual(destination.read_bytes(), b"dummy")
+
+
+if __name__ == "__main__":
+    unittest.main()