Added initial version of KML to Tiles converter

tests/test_build_tiles.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+import importlib.util
+import json
+import tempfile
+import unittest
+from pathlib import Path
+
+
+MODULE = Path(__file__).resolve().parents[1] / "scripts" / "build-tiles.py"
+SPEC = importlib.util.spec_from_file_location("build_tiles", MODULE)
+build_tiles = importlib.util.module_from_spec(SPEC)
+assert SPEC.loader is not None
+SPEC.loader.exec_module(build_tiles)
+
+
+class BuildTilesTests(unittest.TestCase):
+    def test_rotation_changes_extent_and_keeps_area(self):
+        plain = {"north": 40.1, "south": 39.7, "east": 25.5, "west": 25.0, "rotation": 0.0}
+        rotated = {**plain, "rotation": 10.0}
+        plain_corners = build_tiles.rotated_corners(plain)
+        rotated_corners = build_tiles.rotated_corners(rotated)
+        self.assertNotEqual(plain_corners, rotated_corners)
+        self.assertAlmostEqual(build_tiles.polygon_area(plain_corners), build_tiles.polygon_area(rotated_corners), places=2)
+
+    def test_source_override_precedes_global(self):
+        config = {"global": {"minzoom": 7, "maxzoom": 12}, "sources": {"Altis.kmz": {"minzoom": 9, "maxzoom": 14}}}
+        self.assertEqual(build_tiles.effective_zooms(11, "Altis.kmz", config), (9, 14, True))
+
+    def test_config_normalizes_source_key(self):
+        with tempfile.TemporaryDirectory() as directory:
+            path = Path(directory) / "maps.json"
+            path.write_text(json.dumps({"global": {}, "sources": {"nested\\map.kmz": {"minzoom": 8}}}))
+            self.assertIn("nested/map.kmz", build_tiles.read_config(path)["sources"])
+
+
+if __name__ == "__main__":
+    unittest.main()