def test_simple():
morezeros = '\x00' * (struct.calcsize('l')-4)
assert struct.pack('<l', 16) == '\x10\x00\x00\x00' + morezeros
assert struct.pack('4s', 'WAVE') == 'WAVE'
assert struct.pack('<4sl', 'WAVE', 16) == 'WAVE\x10\x00\x00\x00' + morezeros
s = 'ABCD01234567\x01\x00\x00\x00\x02\x00\x00\x00\x03\x00'
assert struct.unpack('<4s4H2lH', s) == ('ABCD', 0x3130, 0x3332, 0x3534,
0x3736, 1, 2, 3)
def test_nan():
INFINITY = 1e200 * 1e200
NAN = INFINITY / INFINITY
assert str(struct.unpack("!d", '\xff\xf8\x00\x00\x00\x00\x00\x00')[0]) \
== str(NAN)
assert str(struct.unpack("!d", struct.pack("!d", NAN))[0]) == str(NAN)
def test_infinity():
INFINITY = 1e200 * 1e200
assert str(struct.unpack("!d", struct.pack("!d", INFINITY))[0]) \
== str(INFINITY)
assert str(struct.unpack("!d", struct.pack("!d", -INFINITY))[0]) \
== str(-INFINITY)