support/testing: add flac runtime test

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -1899,6 +1899,7 @@ F:	support/testing/tests/package/test_exfatprogs.py
 F:	support/testing/tests/package/test_exfatprogs/
 F:	support/testing/tests/package/test_file.py
 F:	support/testing/tests/package/test_file/
+F:	support/testing/tests/package/test_flac.py
 F:	support/testing/tests/package/test_fluidsynth.py
 F:	support/testing/tests/package/test_fluidsynth/
 F:	support/testing/tests/package/test_fping.py

support/testing/tests/package/test_flac.py

@@ -0,0 +1,20 @@
+from tests.package.test_audio_codec_base import TestAudioCodecBase
+
+
+class TestFlac(TestAudioCodecBase):
+    __test__ = True
+    config = TestAudioCodecBase.config + \
+        """
+        BR2_PACKAGE_FLAC=y
+        """
+    encoded_file = "encoded.flac"
+
+    def encode_test(self, input_filename):
+        cmd = "flac"
+        cmd += f" -o {self.encoded_file} {input_filename}"
+        self.assertRunOk(cmd)
+
+    def decode_test(self, output_filename):
+        cmd = "flac -d"
+        cmd += f" -o {output_filename} {self.encoded_file}"
+        self.assertRunOk(cmd)