def testFontFileReads(self):
"Tests TTFontParset.read_xxx"
class FakeTTFontFile(TTFontParser):
def __init__(self, data):
self._ttf_data = data
self._pos = 0
ttf = FakeTTFontFile("\x81\x02\x03\x04" "\x85\x06" "ABCD" "\x7F\xFF" "\x80\x00" "\xFF\xFF")
self.assertEquals(ttf.read_ulong(), _L2U32(0x81020304L)) # big-endian
self.assertEquals(ttf._pos, 4)
self.assertEquals(ttf.read_ushort(), 0x8506)
self.assertEquals(ttf._pos, 6)
self.assertEquals(ttf.read_tag(), "ABCD")
self.assertEquals(ttf._pos, 10)
self.assertEquals(ttf.read_short(), 0x7FFF)
self.assertEquals(ttf.read_short(), -0x8000)
self.assertEquals(ttf.read_short(), -1)
def testChecksum(self):
"Test calcChecksum function"
self.assertEquals(calcChecksum(""), 0)
self.assertEquals(calcChecksum("\1"), 0x01000000)
self.assertEquals(calcChecksum("\x01\x02\x03\x04\x10\x20\x30\x40"), 0x11223344)
self.assertEquals(calcChecksum("\x81"), _L2U32(0x81000000L))
self.assertEquals(calcChecksum("\x81\x02"), _L2U32(0x81020000L))
self.assertEquals(calcChecksum("\x81\x02\x03"), _L2U32(0x81020300L))
self.assertEquals(calcChecksum("\x81\x02\x03\x04"), _L2U32(0x81020304L))
self.assertEquals(calcChecksum("\x81\x02\x03\x04\x05"), _L2U32(0x86020304L))
self.assertEquals(calcChecksum("\x41\x02\x03\x04\xD0\x20\x30\x40"), 0x11223344)
self.assertEquals(calcChecksum("\xD1\x02\x03\x04\x40\x20\x30\x40"), 0x11223344)
self.assertEquals(calcChecksum("\x81\x02\x03\x04\x90\x20\x30\x40"), 0x11223344)
self.assertEquals(calcChecksum("\x7F\xFF\xFF\xFF\x00\x00\x00\x01"), _L2U32(0x80000000L))
def testAdd32(self):
"Test add32"
self.assertEquals(add32(10, -6), 4)
self.assertEquals(add32(6, -10), -4)
self.assertEquals(add32(_L2U32(0x80000000L), -1), 0x7FFFFFFF)
self.assertEquals(add32(0x7FFFFFFF, 1), _L2U32(0x80000000L))
