demo

py/test.py

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+#!/usr/bin/env python
+
+# These are internal tests. They shouldn't fail, but they don't cover all
+# of the ALSA API. Most importantly PCM.read and PCM.write are missing.
+# These need to be tested by playbacktest.py and recordtest.py
+
+# In case of a problem, run these tests. If they fail, file a bug report on
+# http://github.com/larsimmisch/pyalsaaudio/issues
+
+import unittest
+import alsaaudio
+import warnings
+
+# we can't test read and write well - these are tested otherwise
+PCMMethods = [('pcmtype', None),
+              ('pcmmode', None),
+              ('cardname', None),
+              ('setchannels', (2,)), 
+              ('setrate', (44100,)),
+              ('setformat', (alsaaudio.PCM_FORMAT_S8,)),
+              ('setperiodsize', (320,))]
+
+# A clever test would look at the Mixer capabilities and selectively run the
+# omitted tests, but I am too tired for that.
+
+MixerMethods = [('cardname', None),
+                ('mixer', None),
+                ('mixerid', None),
+                ('switchcap', None),
+                ('volumecap', None),
+                ('getvolume', None),
+                ('getrange', None),
+                ('getenum', None),
+#                ('getmute', None),
+#                ('getrec', None),
+#                ('setvolume', (60,)),
+#                ('setmute', (0,))
+#                ('setrec', (0')),
+                ]
+
+class MixerTest(unittest.TestCase):
+    """Test Mixer objects"""
+
+    def testMixer(self):
+        """Open the default Mixers and the Mixers on every card"""
+        
+        for c in alsaaudio.card_indexes():
+            mixers = alsaaudio.mixers(cardindex=c)
+            
+            for m in mixers:
+                mixer = alsaaudio.Mixer(m, cardindex=c)
+                mixer.close()
+
+    def testMixerAll(self):
+        "Run common Mixer methods on an open object"
+
+        mixers = alsaaudio.mixers()
+        mixer = alsaaudio.Mixer(mixers[0])
+
+        for m, a in MixerMethods:
+            f = alsaaudio.Mixer.__dict__[m]
+            if a is None:
+                f(mixer)
+            else:
+                f(mixer, *a)
+
+        mixer.close()
+
+    def testMixerClose(self):
+        """Run common Mixer methods on a closed object and verify it raises an 
+        error"""
+
+        mixers = alsaaudio.mixers()
+        mixer = alsaaudio.Mixer(mixers[0])
+        mixer.close()
+
+        for m, a in MixerMethods:
+            f = alsaaudio.Mixer.__dict__[m]
+            if a is None:
+                self.assertRaises(alsaaudio.ALSAAudioError, f, mixer)
+            else:
+                self.assertRaises(alsaaudio.ALSAAudioError, f, mixer, *a)
+
+class PCMTest(unittest.TestCase):
+    """Test PCM objects"""
+
+    def testPCM(self):
+        "Open a PCM object on every card"
+
+        for c in alsaaudio.card_indexes():
+            pcm = alsaaudio.PCM(cardindex=c)
+            pcm.close()
+
+    def testPCMAll(self):
+        "Run all PCM methods on an open object"
+
+        pcm = alsaaudio.PCM()
+
+        for m, a in PCMMethods:
+            f = alsaaudio.PCM.__dict__[m]
+            if a is None:
+                f(pcm)
+            else:
+                f(pcm, *a)
+
+        pcm.close()
+
+    def testPCMClose(self):
+        "Run all PCM methods on a closed object and verify it raises an error"
+
+        pcm = alsaaudio.PCM()
+        pcm.close()
+
+        for m, a in PCMMethods:
+            f = alsaaudio.PCM.__dict__[m]
+            if a is None:
+                self.assertRaises(alsaaudio.ALSAAudioError, f, pcm)
+            else:
+                self.assertRaises(alsaaudio.ALSAAudioError, f, pcm, *a)
+
+    def testPCMDeprecated(self):
+        with warnings.catch_warnings(record=True) as w:
+            # Cause all warnings to always be triggered.
+            warnings.simplefilter("always")
+
+            try:
+                pcm = alsaaudio.PCM(card='default')
+            except alsaaudio.ALSAAudioError:
+                pass
+                
+            # Verify we got a DepreciationWarning
+            assert len(w) == 1
+            assert issubclass(w[-1].category, DeprecationWarning)
+                
+if __name__ == '__main__':
+    unittest.main()