Test: post-processors

backend/test_pp.py

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+from unittest import TestCase
+
+import os
+import subprocess
+
+from mutagen import mp3
+
+import id3pp
+import http_pool
+
+
+TEST_MP3 = 'music/test.mp3'
+
+INFO_BEFORE = {
+    "filepath": TEST_MP3,
+    "title": "A Line in the Sand",
+    "channel": "Linkin Park - Topic",
+    "playlist": "Album \u2013 The Hunting Party",
+    "playlist_index": 12,
+    "release_year": 2015,
+    "genre": "numetal",
+}
+
+INFO_AFTER = {
+    **INFO_BEFORE,
+    "track": "A Line in the Sand",
+    "artist": "Linkin Park",
+    "album": "The Hunting Party",
+    "track_number": 12,
+}
+
+
+class TestPostProcessorsOnFakeData(TestCase):
+
+    def setUp(self) -> None:
+
+        http_pool.get()
+
+    def test_infoytpp(self) -> None:
+
+        _, info = id3pp.InfoYouTubePP().run(INFO_BEFORE)
+        self.assertEqual(info, INFO_AFTER)
+
+    def test_id3(self) -> None:
+
+        try:
+            if os.path.exists(TEST_MP3):
+                os.unlink(TEST_MP3)
+            ret = subprocess.call(
+                [
+                    'ffmpeg',
+                    '-nostdin',
+                    '-f', 'lavfi',
+                    '-i', 'anullsrc=r=44100:cl=mono',
+                    '-t', '1',
+                    '-b:a', '32k',
+                    '-acodec', 'libmp3lame',
+                    TEST_MP3,
+                ],
+                stdout=subprocess.DEVNULL,
+                stderr=subprocess.DEVNULL,
+            )
+            if ret != 0:
+                raise RuntimeError(f'FFmpeg returned {ret} exit code')
+        except Exception as err:
+            self.skipTest(f'Error while writing empty MP3: {err:r}')
+
+        id3pp.ID3TagsPP().run(INFO_AFTER)
+
+        file = mp3.MP3(TEST_MP3)
+        self.assertEqual(file['TIT2'].text[0], 'A Line in the Sand')
+        self.assertEqual(file['TPE1'].text[0], 'Linkin Park')
+        self.assertEqual(file['TALB'].text[0], 'The Hunting Party')
+        self.assertEqual(file['TDRC'].text[0].get_text(), '2015')
+        self.assertEqual(file['TRCK'].text[0], '12')
+        self.assertEqual(file['TCON'].text[0], 'numetal')
+
+    def tearDown(self) -> None:
+
+        http_pool.get().clear()