def test_should_not_stop_fetching_if_forward_fetch_returns_fewer_records(
self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
drv = ScreenBufferTest.FakeDriver(self.queue)
self.queue.push_backward_records(14, 7)
buf.get_records(drv)
buf.go_to_previous_line()
self.queue.push(None)
buf.get_records(drv)
buf.go_to_previous_page()
buf.go_to_previous_page()
self.queue.push_backward_records(7, 7)
buf.get_records(drv)
buf.go_to_previous_page()
cur = buf.get_current_lines()
self.assertEqual(2, len(cur))
self.assertEqual('6', cur[0].message)
self.assertEqual('7', cur[1].message)
def test_should_get_timeout_if_forward_fetch_returns_fewer_records(self):
buf = ScreenBuffer(2, buffer_size=5, timeout=13)
drv = ScreenBufferTest.FakeDriver(self.queue)
self.queue.push_backward_records(7, 7)
buf.get_records(drv)
buf.go_to_previous_line()
self.queue.push_forward_records(8, 4)
self.assertEqual(13, buf.get_records(drv))
def test_should_get_timeout_if_forward_fetch_returns_fewer_records(self):
buf = ScreenBuffer(2, buffer_size=5, timeout=13)
drv = ScreenBufferTest.FakeDriver(self.queue)
self.queue.push_backward_records(7, 7)
buf.get_records(drv)
buf.go_to_previous_line()
self.queue.push_forward_records(8, 4)
self.assertEqual(13, buf.get_records(drv))
def test_should_not_get_timeout_if_forward_fetch_returns_correct_number_of_records(self):
buf = ScreenBuffer(2, buffer_size=5, timeout=13)
drv = ScreenBufferTest.FakeDriver(self.queue)
self.queue.push_backward_records(7, 7)
buf.get_records(drv)
buf.go_to_previous_line()
self.queue.push_forward_records(8, 5)
self.assertIsNone(buf.get_records(drv))
def test_should_not_get_timeout_if_forward_fetch_returns_correct_number_of_records(
self):
buf = ScreenBuffer(2, buffer_size=5, timeout=13)
drv = ScreenBufferTest.FakeDriver(self.queue)
self.queue.push_backward_records(7, 7)
buf.get_records(drv)
buf.go_to_previous_line()
self.queue.push_forward_records(8, 5)
self.assertIsNone(buf.get_records(drv))
def test_should_go_to_previous_line(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
for i in range(10, 0, -1):
buf.prepend_record(self._get_line(i))
buf.go_to_previous_line()
cur = buf.get_current_lines()
self.assertEqual(2, len(cur))
self.assertEqual('8', cur[0].message)
def test_should_not_get_buffer_instructions_for_backward_buffer_if_below_threshold(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
for i in range(10, 20):
buf.append_record(self._get_line(i + 1))
buf.go_to_previous_page()
buf.go_to_previous_page()
buf.go_to_previous_line()
self.assertEqual(tuple(),
buf.get_buffer_instructions(ScreenBufferTest.NullDriver()))
def test_should_go_to_previous_line(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
for i in range(10, 0, -1):
buf.prepend_record(self._get_line(i))
buf.go_to_previous_line()
cur = buf.get_current_lines()
self.assertEqual(2, len(cur))
self.assertEqual('8', cur[0].message)
def test_should_prepend_record_on_buffer_not_at_end_of_screen(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
buf.append_record(self._get_line(2))
buf.append_record(self._get_line(3))
buf.append_record(self._get_line(4))
buf.go_to_previous_line()
buf.prepend_record(self._get_line(1))
cur = buf.get_current_lines()
self.assertEqual(2, len(cur))
self.assertEqual('2', cur[0].message)
self.assertEqual('3', cur[1].message)
def test_should_prepend_record_on_buffer_not_at_end_of_screen(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
buf.append_record(self._get_line(2))
buf.append_record(self._get_line(3))
buf.append_record(self._get_line(4))
buf.go_to_previous_line()
buf.prepend_record(self._get_line(1))
cur = buf.get_current_lines()
self.assertEqual(2, len(cur))
self.assertEqual('2', cur[0].message)
self.assertEqual('3', cur[1].message)
def test_should_not_get_buffer_instructions_for_backward_buffer_if_below_threshold(
self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
for i in range(10, 20):
buf.append_record(self._get_line(i + 1))
buf.go_to_previous_page()
buf.go_to_previous_page()
buf.go_to_previous_line()
self.assertEqual(
tuple(),
buf.get_buffer_instructions(ScreenBufferTest.NullDriver()))
def test_should_not_auto_scroll_if_not_at_end_of_buffer(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
buf.append_record(self._get_line(2))
buf.append_record(self._get_line(3))
buf.append_record(self._get_line(4))
buf.go_to_previous_line()
buf.add_observer(self.observer.notify)
buf.append_record(self._get_line(5))
cur = buf.get_current_lines()
self.assertEqual(2, len(cur))
self.assertEqual('2', cur[0].message)
self.assertEqual(0, self.observer.count)
def test_should_not_auto_scroll_if_not_at_end_of_buffer(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
buf.append_record(self._get_line(2))
buf.append_record(self._get_line(3))
buf.append_record(self._get_line(4))
buf.go_to_previous_line()
buf.add_observer(self.observer.notify)
buf.append_record(self._get_line(5))
cur = buf.get_current_lines()
self.assertEqual(2, len(cur))
self.assertEqual('2', cur[0].message)
self.assertEqual(0, self.observer.count)
def test_should_not_stop_fetching_if_forward_fetch_returns_fewer_records(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
drv = ScreenBufferTest.FakeDriver(self.queue)
self.queue.push_backward_records(14, 7)
buf.get_records(drv)
buf.go_to_previous_line()
self.queue.push(None)
buf.get_records(drv)
buf.go_to_previous_page()
buf.go_to_previous_page()
self.queue.push_backward_records(7, 7)
buf.get_records(drv)
buf.go_to_previous_page()
cur = buf.get_current_lines()
self.assertEqual(2, len(cur))
self.assertEqual('6', cur[0].message)
self.assertEqual('7', cur[1].message)
