Be a lot smarter about whether this test passes: instead of assuming
that a 2.93 sec audio file will always take 3.1 sec (as it did on the
hardware I had when I first wrote the test), expect that it will take
2.93 sec +/- 10%, and only fail if it's outside of that range.
Compute the expected
diff --git a/Lib/test/test_ossaudiodev.py b/Lib/test/test_ossaudiodev.py
index 8810516..9f64406 100644
--- a/Lib/test/test_ossaudiodev.py
+++ b/Lib/test/test_ossaudiodev.py
@@ -69,14 +69,25 @@
except TypeError:
pass
+ # Compute expected running time of sound sample (in seconds).
+ expected_time = float(len(data)) / (ssize/8) / nchannels / rate
+
# set parameters based on .au file headers
dsp.setparameters(AFMT_S16_NE, nchannels, rate)
+ print ("playing test sound file (expected running time: %.2f sec)"
+ % expected_time)
t1 = time.time()
- print "playing test sound file..."
dsp.write(data)
dsp.close()
t2 = time.time()
- print "elapsed time: %.1f sec" % (t2-t1)
+ elapsed_time = t2 - t1
+
+ percent_diff = (abs(elapsed_time - expected_time) / expected_time) * 100
+ #print ("actual running time was %.2f sec (%.1f%% difference)"
+ # % (elapsed_time, percent_diff))
+ assert percent_diff <= 10.0, \
+ ("elapsed time (%.2f sec) > 10%% off of expected time (%.2f sec)"
+ % (elapsed_time, expected_time))
def test_setparameters(dsp):
# Two configurations for testing: