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_go_to_previous_page_with_less_lines_than_page_size(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
buf.prepend_record(self._get_line(1))
buf.go_to_previous_page()
cur = buf.get_current_lines()
self.assertEqual(1, len(cur))
self.assertEqual('1', cur[0].message)
def test_should_get_buffer_instructions_for_backward_buffer(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
for i in range(10, 20):
buf.append_record(self._get_line(i + 1))
for i in range(0, 3):
buf.go_to_previous_page()
self.assertEqual(((11, True, 5),),
buf.get_buffer_instructions(ScreenBufferTest.NullDriver()))
def test_should_go_to_previous_page_with_less_lines_than_page_size(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
buf.prepend_record(self._get_line(1))
buf.go_to_previous_page()
cur = buf.get_current_lines()
self.assertEqual(1, len(cur))
self.assertEqual('1', cur[0].message)
def test_should_get_buffer_instructions_for_backward_buffer(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
for i in range(10, 20):
buf.append_record(self._get_line(i + 1))
for i in range(0, 3):
buf.go_to_previous_page()
self.assertEqual(
((11, True, 5), ),
buf.get_buffer_instructions(ScreenBufferTest.NullDriver()))
def test_should_not_get_timeout_if_backward_fetch_returns_fewer_records(self):
buf = ScreenBuffer(2, buffer_size=5, timeout=13)
drv = ScreenBufferTest.FakeDriver(self.queue)
self.queue.push_backward_records(14, 7)
buf.get_records(drv)
buf.go_to_previous_page()
buf.go_to_previous_page()
self.queue.push_backward_records(7, 4)
self.assertIsNone(buf.get_records(drv))
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_get_timeout_if_backward_fetch_returns_fewer_records(
self):
buf = ScreenBuffer(2, buffer_size=5, timeout=13)
drv = ScreenBufferTest.FakeDriver(self.queue)
self.queue.push_backward_records(14, 7)
buf.get_records(drv)
buf.go_to_previous_page()
buf.go_to_previous_page()
self.queue.push_backward_records(7, 4)
self.assertIsNone(buf.get_records(drv))
def test_should_change_page_size_before_end_of_buffer(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_page()
buf.page_size = 3
cur = buf.get_current_lines()
self.assertEqual(3, len(cur))
self.assertEqual('7', cur[0].message)
def test_should_go_to_next_line(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
for i in range(10):
buf.append_record(self._get_line(i + 1))
buf.go_to_previous_page()
buf.go_to_next_line()
cur = buf.get_current_lines()
self.assertEqual(2, len(cur))
self.assertEqual('8', cur[0].message)
def test_should_change_page_size_before_end_of_buffer(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_page()
buf.page_size = 3
cur = buf.get_current_lines()
self.assertEqual(3, len(cur))
self.assertEqual('7', cur[0].message)
def test_should_go_to_next_line(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
for i in range(10):
buf.append_record(self._get_line(i + 1))
buf.go_to_previous_page()
buf.go_to_next_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_stop_fetching_if_fetch_returns_less_records_than_asked(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
drv = ScreenBufferTest.FakeDriver(self.queue)
self.queue.push_backward_records(6, 6)
buf.get_records(drv)
buf.go_to_previous_page()
buf.go_to_previous_page()
buf.get_records(drv)
cur = buf.get_current_lines()
self.assertEqual(2, len(cur))
self.assertEqual('1', cur[0].message)
self.assertEqual('2', cur[1].message)
def test_should_stop_fetching_if_fetch_returns_less_records_than_asked(
self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
drv = ScreenBufferTest.FakeDriver(self.queue)
self.queue.push_backward_records(6, 6)
buf.get_records(drv)
buf.go_to_previous_page()
buf.go_to_previous_page()
buf.get_records(drv)
cur = buf.get_current_lines()
self.assertEqual(2, len(cur))
self.assertEqual('1', cur[0].message)
self.assertEqual('2', cur[1].message)
def test_should_not_stop_fetching_if_fetch_returns_correct_number_of_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_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('7', cur[0].message)
self.assertEqual('8', cur[1].message)
