Test: Retrieve track duration

tests/test_metadata_duration.liq

+#!/usr/bin/env liquidsoap
+#
+# 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/>.
+
+
+%include "base_config.liq"
+settings.frame.audio.samplerate.set(44100)
+
+%include "../src/functions.liq"
+
+# Read duration from file => 808
+metadata = [( "track_duration", "808" )]
+duration = get_meta_track_duration(metadata)
+print("Track duration in meta 'track_duration': #{duration}")
+assertEquals(duration, 808)
+
+# Read duration from file => 207
+input_fs = single(id="fs", "assets/audio.mp3")
+def process(metadata) =
+    duration = get_meta_track_duration(metadata)
+    print("Track duration on file: #{duration}")
+    assertEquals(duration, 207)
+    shutdown(code=0)
+end
+input_fs.on_metadata(process)
+output.dummy(id="dummy", input_fs)
+