def test_properties(self):
x = TextScanner("Hi \n")
self.assertEquals(x.position, 0)
self.assertFalse(x.at_end)
self.assertEquals(x.characters_remaining, 4)
x.read_uchar()
self.assertEquals(x.position, 1)
self.assertFalse(x.at_end)
self.assertEquals(x.characters_remaining, 3)
x.read_uchar()
self.assertEquals(x.position, 2)
self.assertFalse(x.at_end)
self.assertEquals(x.characters_remaining, 2)
x.read_uchar()
self.assertEquals(x.position, 3)
self.assertFalse(x.at_end)
self.assertEquals(x.characters_remaining, 1)
x.read_uchar()
self.assertEquals(x.position, 4)
self.assertTrue(x.at_end)
self.assertEquals(x.characters_remaining, 0)
def test_read_ubyte(self):
x = TextScanner("Hi \n")
self.assertEquals(x.read_uchar(), "H")
self.assertEquals(x.read_uchar(), "i")
self.assertEquals(x.read_uchar(), " ")
self.assertEquals(x.read_uchar(), "\n")
self.assertRaises(IndexError, x.read_uchar)
def test_peek_next_ubyte(self):
x = TextScanner("Hi \n")
x.read_uchar()
x.read_uchar()
self.assertEquals(x.peek_next_uchar(), " ")
self.assertEquals(x.peek_next_uchar(1), "\n")
self.assertEquals(x.peek_next_uchar(2, none_if_bad_index=True), None)
self.assertRaises(IndexError, x.peek_next_uchar, 2)
def test_peek_next_ubyte_with_negative(self):
x = TextScanner("Hi \n")
x.read_uchar()
x.read_uchar()
self.assertEquals(x.peek_next_uchar(-1), "i")
self.assertEquals(x.peek_next_uchar(-2), "H")
self.assertEquals(x.peek_next_uchar(-3, none_if_bad_index=True), None)
self.assertRaises(IndexError, x.peek_next_uchar, (-3))
def test_line_number_for_offset_with_negative_offset(self):
x = TextScanner("Hi there\nAnother line\nOne more")
# 01234567 8901234567890 12345678
# Advance to the 'n' in One.
for i in range(23):
x.read_uchar()
self.assertEquals(x.line_number_for_offset(-2), 2)
self.assertEquals(x.line_number_for_offset(-1), 3)
self.assertEquals(x.line_number_for_offset(-20), 1)
self.assertRaises(IndexError, x.line_number_for_offset, (-25))
def test_read_ubytes(self):
x = TextScanner("Hi there\n")
self.assertEquals(x.read_uchars(2), "Hi")
self.assertEquals(x.read_uchars(4), " the")
self.assertRaises(IndexError, x.read_uchars, 10)
def test_constructor(self):
x = TextScanner("Hi there")
self.assertEquals(x.position, 0)
def test_line_number_for_offset(self):
x = TextScanner("Hi there\nAnother line\nOne more")
self.assertEquals(x.line_number_for_offset(4), 1)
self.assertEquals(x.line_number_for_offset(9), 2)
self.assertEquals(x.line_number_for_offset(23), 3)
x = TextScanner("Hi there\rAnother line")
self.assertEquals(x.line_number_for_offset(4), 1)
self.assertEquals(x.line_number_for_offset(9), 2)
x = TextScanner("Hi there\r\nAnother line")
self.assertEquals(x.line_number_for_offset(4), 1)
self.assertEquals(x.line_number_for_offset(10), 2)
self.assertRaises(IndexError, x.line_number_for_offset, 25)