def test_seq_read_write(self):
b = VecBuf()
fl = flatten
b.write_seq(['ab', 'cd', '', 'ef', 'gh', 'ij'])
self.assertMatches(b.read(0), '')
self.assertMatches(b.read(1), 'a')
self.assertMatches(b.read(2), 'bc')
self.assertMatches(b.read(4), 'defg')
self.assertMatches(b.read(0), '')
self.assertMatches(b.read(2), 'hi')
self.assertRaises(VecBufEOB, b.read, 2)
self.assertMatches(b.read(0), '')
self.assertMatches(b.read(1), 'j')
self.assertRaises(VecBufEOB, b.read, 1)
b.write_seq(['', 'abcd', 'efgh', 'ijkl', 'mnop'])
self.assertMatches(b.read(2), 'ab')
self.assertMatches(fl(b.read_seq(8)), 'cdefghij')
self.assertMatches(b.read(4), 'klmn')
self.assertRaises(VecBufEOB, b.read_seq, 3)
self.assertMatches(fl(b.read_seq(2)), 'op')
self.assertRaises(VecBufEOB, b.read, 1)
def test_peek(self):
b = VecBuf()
fl = flatten
self.assertMatches(b.peek(0), '')
self.assertRaises(VecBufEOB, b.peek, 1)
self.assertRaises(VecBufEOB, b.peek_seq, 1)
self.assertRaises(VecBufEOB, b.read, 1)
b.write('ab')
b.write_seq(['cd', '', 'ef'])
self.assertMatches(b.peek(3), 'abc')
self.assertMatches(b.peek(3), 'abc')
self.assertMatches(fl(b.peek_seq(3)), 'abc')
self.assertMatches(b.read(1), 'a')
self.assertMatches(b.read(2), 'bc')
b.write_seq(['gh', 'ij'])
self.assertMatches(fl(b.peek_seq(7)), 'defghij')
self.assertMatches(b.peek(7), 'defghij')
self.assertMatches(fl(b.peek_seq(7)), 'defghij')
self.assertMatches(b.peek(7), 'defghij')
self.assertMatches(fl(b.read_seq(7)), 'defghij')
self.assertMatches(b.peek(0), '')
self.assertRaises(VecBufEOB, b.peek, 1)
self.assertRaises(VecBufEOB, b.peek_seq, 1)
self.assertRaises(VecBufEOB, b.read, 1)
def test_seq_read_empty(self):
b = VecBuf()
fl = flatten
self.assertMatches(fl(b.read_seq(0)), '')
self.assertRaises(VecBufEOB, b.read_seq, 1)
b.write('')
self.assertMatches(fl(b.read_seq(0)), '')
self.assertRaises(VecBufEOB, b.read_seq, 1)
b.write_seq([''])
self.assertMatches(fl(b.read_seq(0)), '')
self.assertRaises(VecBufEOB, b.read_seq, 1)
b.write_seq(['', ''])
self.assertMatches(fl(b.read_seq(0)), '')
self.assertRaises(VecBufEOB, b.read_seq, 1)
def test_seq_read_write_other(self):
b = VecBuf()
fl = flatten
b.write_seq(['ab', 'cd', '', 'ef', 'gh', 'ij'])
self.assertMatches(b.read(0), '')
self.assertMatches(b.read(1), 'a')
self.assertMatches(b.read(2), 'bc')
b2 = VecBuf()
b2.write_seq(b.read_seq(6))
self.assertMatches(b.read(1), 'j')
self.assertRaises(VecBufEOB, b.read, 1)
self.assertMatches(b2.read(6), 'defghi')
self.assertRaises(VecBufEOB, b2.read, 1)
