class ReadOnceBufferTest(unittest.TestCase):
def setUp(self):
self.buf = ReadOnceBuffer('spameggs')
def test_identity(self):
self.assertEquals(self.buf, ReadOnceBuffer('spameggs'))
def test_addition(self):
self.assertEquals(self.buf + 'foo', ReadOnceBuffer('spameggsfoo'))
#addition returns a new object
self.assertIsNot(self.buf + 'foo', self.buf)
def test_inplace_addition(self):
self.buf += 'bar'
self.assertEquals(self.buf, ReadOnceBuffer('spameggsbar'))
#inplace addition returns the same object
self._buf = self.buf
self.buf += 'foo'
self.assertIs(self.buf, self._buf)
def test_raise_out_of_bounds(self):
self.assertRaises(IndexError, lambda: self.buf[200])
def test_indexing_deletes(self):
self.assertEquals(ord('p'), self.buf[1])
self.assertEquals(ReadOnceBuffer('sameggs'), self.buf)
def test_slicing_deletes(self):
self.assertEquals(ReadOnceBuffer('ame'), self.buf[2:5])
self.assertEquals(ReadOnceBuffer('spggs'), self.buf)
def test_full_deletion(self):
self.assertEquals(ReadOnceBuffer('spameggs'), self.buf[:])
self.assertEquals(ReadOnceBuffer(), self.buf)
def test_peek_index_doesnt_delete(self):
self.assertEquals(self.buf.peek(2), ord('a'))
self.assertEquals(self.buf, ReadOnceBuffer('spameggs'))
def test_peek_slice_doesnt_delete(self):
self.assertEquals(self.buf.peek(2, 5), ReadOnceBuffer('ame'))
self.assertEquals(self.buf, ReadOnceBuffer('spameggs'))
def setUp(self):
self.buf = ReadOnceBuffer('spameggs')