cpython/Lib/test/test_audioop.py

# Test audioop.
import audioop
from test_support import verbose

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

def gendata2():
    if verbose:
        print 'getsample'
    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 verbose:
        print 'getsample'
    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 verbose:
        print 'max'
    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 testminmax(data):
    if verbose:
        print 'minmax'
    if audioop.minmax(data[0], 1) != (0, 2) or \
              audioop.minmax(data[1], 2) != (0, 2) or \
              audioop.minmax(data[2], 4) != (0, 2):
        return 0
    return 1

def testmaxpp(data):
    if verbose:
        print 'maxpp'
    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 verbose:
        print 'avg'
    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 verbose:
        print 'avgpp'
    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 verbose:
        print 'cross'
    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):
    if verbose:
        print 'add'
    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):
    if verbose:
        print 'bias'
    # 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):
    if verbose:
        print 'lin2lin'
    # 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):
    if verbose:
        print 'lin2adpcm'
    # Very cursory test
    if audioop.lin2adpcm('\0\0\0\0', 1, None) != ('\0\0', (0,0)):
        return 0
    return 1

def testlin2ulaw(data):
    if verbose:
        print 'lin2ulaw'
    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):
    if verbose:
        print 'ulaw2lin'
    # Cursory
    d = audioop.lin2ulaw(data[0], 1)
    if audioop.ulaw2lin(d, 1) != data[0]:
        return 0
    return 1

def testmul(data):
    if verbose:
        print 'mul'
    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 testratecv(data):
    if verbose:
        print 'ratecv'
    state = None
    d1, state = audioop.ratecv(data[0], 1, 1, 8000, 16000, state)
    d2, state = audioop.ratecv(data[0], 1, 1, 8000, 16000, state)
    if d1 + d2 != '\000\000\001\001\002\001\000\000\001\001\002':
        return 0
    return 1

def testreverse(data):
    if verbose:
        print 'reverse'
    if audioop.reverse(data[0], 1) != '\2\1\0':
        return 0
    return 1

def testtomono(data):
    if verbose:
        print 'tomono'
    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):
    if verbose:
        print 'tostereo'
    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 verbose:
        print 'findfactor'
    if audioop.findfactor(data[1], data[1]) != 1.0:
        return 0
    return 1

def testfindfit(data):
    if verbose:
        print 'findfit'
    if audioop.findfit(data[1], data[1]) != (0, 1.0):
        return 0
    return 1

def testfindmax(data):
    if verbose:
        print 'findmax'
    if audioop.findmax(data[1], 1) != 2:
        return 0
    return 1

def testgetsample(data):
    if verbose:
        print 'getsample'
    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()