Initial commit with translated description

tests/test_mileage_db.py

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+import os
+import tempfile
+import unittest
+from pathlib import Path
+
+import scripts.tesla as tesla
+
+
+class MileageDbTests(unittest.TestCase):
+    def test_init_and_insert(self):
+        with tempfile.TemporaryDirectory() as td:
+            db = Path(td) / "mileage.sqlite"
+            tesla.mileage_init_db(db)
+
+            conn = tesla._db_connect(db)
+            try:
+                tesla.mileage_insert_point(
+                    conn,
+                    ts_utc=1700000000,
+                    vehicle_id="123",
+                    vehicle_name="Car",
+                    odometer_mi=100.0,
+                    state="online",
+                    source="test",
+                    note=None,
+                )
+                conn.commit()
+
+                last = tesla.mileage_last_success_ts(conn, "123")
+                self.assertEqual(last, 1700000000)
+            finally:
+                conn.close()
+
+    def test_resolve_db_path_env(self):
+        with tempfile.TemporaryDirectory() as td:
+            p = str(Path(td) / "x.sqlite")
+            os.environ["MY_TESLA_MILEAGE_DB"] = p
+            try:
+                out = tesla.resolve_mileage_db_path(None)
+                self.assertEqual(str(out), p)
+            finally:
+                os.environ.pop("MY_TESLA_MILEAGE_DB", None)
+
+
+if __name__ == "__main__":
+    unittest.main()