test: add test cases for M3U spreading

tests/m3u/sample.m3u

+#EXTM3U
+#EXTINF:123,Alle - Unser Lied
+/media/music-lib/Unser Album/Unser Lied.flac
+#EXTINF:321,Alle - Dein Lied
+music-lib/Unser Album/Dein Lied.ogg
+#EXTINF:231,Alle - Liedlos
+../music-lib/Alle/Unser Album/Liedlos.m4a
+#EXTINF:213,Alle - Euer Lied
+http://www.example.org/music/Alle-Unser_Album-Euer_Lied.mp3
\ No newline at end of file

tests/test_scheduling_utils.py

+#
+# Aura Engine (https://gitlab.servus.at/aura/engine)
+#
+# Copyright (C) 2017-now() - The Aura Engine Team.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+import json
+import os
+import unittest
+from datetime import datetime, timedelta
+from unittest import mock
+
+from aura_engine.base.config import AuraConfig
+from aura_engine.scheduling.domain import PlaylistItem
+from aura_engine.scheduling.utils import M3UPlaylistProcessor
+
+
+class TestSchedulingUtils(unittest.TestCase):
+    """
+    Testing the scheduling utils.
+    """
+
+    config = None
+    m3u = None
+
+    # Setup and teardown
+
+    def setUp(self):
+        self.config = AuraConfig()
+        self.m3u = M3UPlaylistProcessor()
+        self.m3u.playlist_folder = "./tests/m3u/"
+
+    def tearDown(self):
+        pass
+
+    #
+    # Test Cases
+    #
+
+    def test_spread_m3u_playlist(self):
+        print(self._testMethodName)
+
+        item = PlaylistItem("playlist://sample.m3u", None, 100, PlaylistItem.Metadata("", "", ""))
+        items = self.m3u.spread(item)
+        self.assertIsNotNone(items)
+        self.assertEqual(4, len(items))
+        self.assertEqual("file://music-lib/Unser Album/Dein Lied.ogg", items[1].source)
+        self.assertEqual("Alle", items[1].metadata.artist)
+        self.assertEqual("Dein Lied", items[1].metadata.title)
+
+    def test_spread_no_m3u_item(self):
+        print(self._testMethodName)
+
+        item = PlaylistItem("file://no-m3u.mp3", None, 100, PlaylistItem.Metadata("", "", ""))
+        items = self.m3u.spread(item)
+        self.assertIsNotNone(items)
+        self.assertEqual(1, len(items))
+        self.assertEqual("file://no-m3u.mp3", items[0].source)
+
+    def test_spread_no_m3u_playlist(self):
+        print(self._testMethodName)
+
+        print(self._testMethodName)
+
+        item = PlaylistItem("playlist://404.m3u", None, 100, PlaylistItem.Metadata("", "", ""))
+        items = self.m3u.spread(item)
+
+        self.assertEqual(0, len(items))
+
+
+if __name__ == "__main__":
+    unittest.main()