init

tests/test_change_path.py

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+import sqlite3
+import unittest
+from pathlib import Path
+import change_path
+import shared
+
+
+class TestChangePath(unittest.TestCase):
+    SAMPLE_TRACK_PATH_1 = '/music/music/Def Leppard/01 - Studio Albums/1980 - On Through The Night/03. Sorrow Is A Woman.mp3'
+    SAMPLE_TRACK_PATH_2 = '/music/music/Def Leppard/01 - Studio Albums/1980 - On Through The Night/05. Satellite.mp3'
+    NOTHING = '/nothing'
+
+    def setUp(self) -> None:
+        self.conn = sqlite3.connect(':memory:')
+
+        with open(Path(__file__).parent.resolve() / 'database.sql', 'r', encoding='utf-8') as dump:
+            self.conn.executescript(dump.read())
+
+    def test_move_file_into_existing_one(self):
+        """
+        Make sure we can't move a track to path of another, existing in db, track as it would violate unique
+        constraint on media_file.id (given it is md5(file_path)
+        :return:
+        """
+        with self.assertRaises(sqlite3.IntegrityError, msg='Expected a unique constraint violation') as context:
+            change_path.main(
+                self.conn,
+                from_path=self.SAMPLE_TRACK_PATH_1,
+                to_path=self.SAMPLE_TRACK_PATH_2
+            )
+
+        self.assertIn('UNIQUE constraint failed: media_file.id', context.exception.args)
+
+        self.conn.rollback()
+
+    def test_move_file_into_non_existing_one(self):
+        self.assertEqual(1, len(
+            shared.get_media_by_path(self.conn, self.SAMPLE_TRACK_PATH_1)
+        ), 'expected to find one song in db by path')
+
+        change_path.main(
+            self.conn,
+            from_path=self.SAMPLE_TRACK_PATH_1,
+            to_path=self.NOTHING
+        )
+
+        self.conn.commit()
+
+        self.assertEqual(0, len(
+            shared.get_media_by_path(self.conn, self.SAMPLE_TRACK_PATH_1)
+        ), 'expected to not find a song by old path')
+
+        self.assertEqual(1, len(
+            shared.get_media_by_path(self.conn, self.NOTHING)
+        ), 'expected to find moved song by a new path')