cpython/Lib/test/test_audioop.py

# Test audioop.
import audioop

def gendata1():
	return '\0\1\2'

def gendata2():
	if audioop.getsample('\0\1', 2, 0) == 1:
		return '\0\0\0\1\0\2'
	else:
		return '\0\0\1\0\2\0'

def gendata4():
	if audioop.getsample('\0\0\0\1', 4, 0) == 1:
		return '\0\0\0\0\0\0\0\1\0\0\0\2'
	else:
		return '\0\0\0\0\1\0\0\0\2\0\0\0'

def testmax(data):
	if audioop.max(data[0], 1) <> 2 or \
		  audioop.max(data[1], 2) <> 2 or \
		  audioop.max(data[2], 4) <> 2:
		return 0
	return 1

def testmaxpp(data):
	if audioop.maxpp(data[0], 1) <> 0 or \
		  audioop.maxpp(data[1], 2) <> 0 or \
		  audioop.maxpp(data[2], 4) <> 0:
		return 0
	return 1

def testavg(data):
	if audioop.avg(data[0], 1) <> 1 or \
		  audioop.avg(data[1], 2) <> 1 or \
		  audioop.avg(data[2], 4) <> 1:
		return 0
	return 1

def testavgpp(data):
	if audioop.avgpp(data[0], 1) <> 0 or \
		  audioop.avgpp(data[1], 2) <> 0 or \
		  audioop.avgpp(data[2], 4) <> 0:
		return 0
	return 1

def testrms(data):
	if audioop.rms(data[0], 1) <> 1 or \
		  audioop.rms(data[1], 2) <> 1 or \
		  audioop.rms(data[2], 4) <> 1:
		return 0
	return 1

def testcross(data):
	if audioop.cross(data[0], 1) <> 0 or \
		  audioop.cross(data[1], 2) <> 0 or \
		  audioop.cross(data[2], 4) <> 0:
		return 0
	return 1

def testadd(data):
	data2 = []
	for d in data:
		str = ''
		for s in d:
			str = str + chr(ord(s)*2)
		data2.append(str)
	if audioop.add(data[0], data[0], 1) <> data2[0] or \
		  audioop.add(data[1], data[1], 2) <> data2[1] or \
		  audioop.add(data[2], data[2], 4) <> data2[2]:
		return 0
	return 1

def testbias(data):
	# Note: this test assumes that avg() works
	d1 = audioop.bias(data[0], 1, 100)
	d2 = audioop.bias(data[1], 2, 100)
	d4 = audioop.bias(data[2], 4, 100)
	if audioop.avg(d1, 1) <> 101 or \
		  audioop.avg(d2, 2) <> 101 or \
		  audioop.avg(d4, 4) <> 101:
		return 0
	return 1

def testlin2lin(data):
	# too simple: we test only the size
	for d1 in data:
		for d2 in data:
			got = len(d1)/3
			wtd = len(d2)/3
			if len(audioop.lin2lin(d1, got, wtd)) <> len(d2):
				return 0
	return 1

def testadpcm2lin(data):
	# Very cursory test
	if audioop.adpcm2lin('\0\0', 1, None) <> ('\0\0\0\0', (0,0)):
		return 0
	return 1

def testlin2adpcm(data):
	# Very cursory test
	if audioop.lin2adpcm('\0\0\0\0', 1, None) <> ('\0\0', (0,0)):
		return 0
	return 1

def testlin2ulaw(data):
	if audioop.lin2ulaw(data[0], 1) <> '\377\347\333' or \
		  audioop.lin2ulaw(data[1], 2) <> '\377\377\377' or \
		  audioop.lin2ulaw(data[2], 4) <> '\377\377\377':
		return 0
	return 1

def testulaw2lin(data):
	# Cursory
	d = audioop.lin2ulaw(data[0], 1)
	if audioop.ulaw2lin(d, 1) <> data[0]:
		return 0
	return 1

def testmul(data):
	data2 = []
	for d in data:
		str = ''
		for s in d:
			str = str + chr(ord(s)*2)
		data2.append(str)
	if audioop.mul(data[0], 1, 2) <> data2[0] or \
		  audioop.mul(data[1],2, 2) <> data2[1] or \
		  audioop.mul(data[2], 4, 2) <> data2[2]:
		return 0
	return 1

def testreverse(data):
	if audioop.reverse(data[0], 1) <> '\2\1\0':
		return 0
	return 1

def testtomono(data):
	data2 = ''
	for d in data[0]:
		data2 = data2 + d + d
	if audioop.tomono(data2, 1, 0.5, 0.5) <> data[0]:
		return 0
	return 1

def testtostereo(data):
	data2 = ''
	for d in data[0]:
		data2 = data2 + d + d
	if audioop.tostereo(data[0], 1, 1, 1) <> data2:
		return 0
	return 1

def testfindfactor(data):
	if audioop.findfactor(data[1], data[1]) <> 1.0:
		return 0
	return 1

def testfindfit(data):
	if audioop.findfit(data[1], data[1]) <> (0, 1.0):
		return 0
	return 1

def testfindmax(data):
	if audioop.findmax(data[1], 1) <> 2:
		return 0
	return 1

def testgetsample(data):
	for i in range(3):
		if audioop.getsample(data[0], 1, i) <> i or \
			  audioop.getsample(data[1], 2, i) <> i or \
			  audioop.getsample(data[2], 4, i) <> i:
			return 0
	return 1

def testone(name, data):
	try:
		func = eval('test'+name)
	except NameError:
		print 'No test found for audioop.'+name+'()'
		return
	try:
		rv = func(data)
	except 'xx':
		print 'Test FAILED for audioop.'+name+'() (with an exception)'
		return
	if not rv:
		print 'Test FAILED for audioop.'+name+'()'

def testall():
	data = [gendata1(), gendata2(), gendata4()]
	names = dir(audioop)
	# We know there is a routine 'add'
	routines = []
	for n in names:
		if type(eval('audioop.'+n)) == type(audioop.add):
			routines.append(n)
	for n in routines:
		testone(n, data)
testall()