class TextBufferTests(unittest.TestCase):
def setUp(self):
self.buf = TextBuffer('hello')
def test_init(self):
self.assertEqual(len(self.buf.contents), 5)
def test_append(self):
self.buf.append(' world!')
self.assertEqual(self.buf.contents.head.value, 'h')
self.assertEqual(self.buf.contents.tail.value, '!')
self.assertEqual(len(self.buf.contents), 12)
def test_prepend(self):
self.buf.prepend('I say ')
self.assertEqual(self.buf.contents.head.value, 'I')
self.assertEqual(self.buf.contents.tail.value, 'o')
self.assertEqual(len(self.buf.contents), 11)
def test_delete_front(self):
self.buf.append(' world!')
self.buf.delete_front(6)
self.assertEqual(self.buf.contents.head.value, 'w')
self.assertEqual(self.buf.contents.tail.value, '!')
self.assertEqual(len(self.buf.contents), 6)
def test_delete_back(self):
self.buf.append(' there, I am from Lambda School')
self.buf.delete_back(7)
self.assertEqual(self.buf.contents.tail.value, 'a')
self.assertEqual(len(self.buf.contents), 29)
def test_join_other_buffer(self):
other_buf = TextBuffer(' world!')
self.buf.join(other_buf)
self.assertEqual(self.buf.contents.head.value, 'h')
self.assertEqual(self.buf.contents.tail.value, '!')
self.assertEqual(len(self.buf.contents), 12)
def test_join_string(self):
string = ' i am a string?'
self.buf.join_string(string)
self.assertEqual(self.buf.contents.head.value, 'h')
self.assertEqual(self.buf.contents.tail.value, '?')
self.assertEqual(len(self.buf.contents), 20)