def test_should_stop_observing(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
buf.add_observer(self.observer.notify)
buf.prepend_record(self._get_line(2))
buf.remove_observer(self.observer.notify)
buf.prepend_record(self._get_line(1))
self.assertEqual(1, self.observer.count)
def test_should_get_buffer_instructions_for_forward_buffer(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
for i in range(10, 0, -1):
buf.prepend_record(self._get_line(i))
self.assertEqual(((10, False, 5),),
buf.get_buffer_instructions(ScreenBufferTest.NullDriver()))
def test_should_stop_observing(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
buf.add_observer(self.observer.notify)
buf.prepend_record(self._get_line(2))
buf.remove_observer(self.observer.notify)
buf.prepend_record(self._get_line(1))
self.assertEqual(1, self.observer.count)
def test_should_get_buffer_instructions_for_forward_buffer(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
for i in range(10, 0, -1):
buf.prepend_record(self._get_line(i))
self.assertEqual(
((10, False, 5), ),
buf.get_buffer_instructions(ScreenBufferTest.NullDriver()))
def test_should_change_page_size_at_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.page_size = 3
cur = buf.get_current_lines()
self.assertEqual(3, len(cur))
self.assertEqual('8', cur[0].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_prepend_multi_line_record_on_non_empty_buffer(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
buf.prepend_record(self._get_line(3))
buf.prepend_record(self._get_line(2))
buf.prepend_record(self._get_line(1, 'a\nb'))
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_multi_line_record_on_empty_buffer(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
buf.prepend_record(self._get_line(1, 'a\nb'))
cur = buf.get_current_lines()
self.assertEqual(2, len(cur))
self.assertEqual('a', cur[0].message)
self.assertEqual(False, cur[0].is_continuation)
self.assertEqual('b', cur[1].message)
self.assertEqual(True, cur[1].is_continuation)
def test_should_prepend_record_on_empty_buffer(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
buf.add_observer(self.observer.notify)
buf.prepend_record(self._get_line(2))
self.assertEqual(1, self.observer.count)
cur = buf.get_current_lines()
self.assertEqual(1, len(cur))
self.assertEqual('2', cur[0].message)
def test_should_prepend_record_on_empty_buffer(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
buf.add_observer(self.observer.notify)
buf.prepend_record(self._get_line(2))
self.assertEqual(1, self.observer.count)
cur = buf.get_current_lines()
self.assertEqual(1, len(cur))
self.assertEqual('2', cur[0].message)
def test_should_change_page_size_at_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.page_size = 3
cur = buf.get_current_lines()
self.assertEqual(3, len(cur))
self.assertEqual('8', cur[0].message)
def test_should_prepend_multi_line_record_on_non_empty_buffer(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
buf.prepend_record(self._get_line(3))
buf.prepend_record(self._get_line(2))
buf.prepend_record(self._get_line(1, 'a\nb'))
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_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_prepend_multi_line_record_on_empty_buffer(self):
buf = ScreenBuffer(page_size=2, buffer_size=5)
buf.prepend_record(self._get_line(1, 'a\nb'))
cur = buf.get_current_lines()
self.assertEqual(2, len(cur))
self.assertEqual('a', cur[0].message)
self.assertEqual(False, cur[0].is_continuation)
self.assertEqual('b', cur[1].message)
self.assertEqual(True, cur[1].is_continuation)
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_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_forward_buffer_if_below_threshold(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()
buf.go_to_previous_line()
buf.go_to_previous_line()
self.assertEqual(tuple(),
buf.get_buffer_instructions(ScreenBufferTest.NullDriver()))
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_forward_buffer_if_below_threshold(
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()
buf.go_to_previous_line()
buf.go_to_previous_line()
self.assertEqual(
tuple(),
buf.get_buffer_instructions(ScreenBufferTest.NullDriver()))
