def test_only_removals(self):
q1 = deque([1, 2])
q2 = deque([])
lcs_marker = ()
expected_diff_block = Chunk([
DiffItem(remove, 1, (0, 1, 0, 0)),
DiffItem(remove, 2, (1, 2, 0, 0))
])
chunks = chunker(
diff_item_data_factory(q1, q2, lcs_marker)
)
self.assertEqual(next(chunks), expected_diff_block)
def test_changes_before_the_first_unchanged_item(self):
q1 = deque([1, 4])
q2 = deque([2, 4])
lcs_markers = ((1, 1),)
chunk = Chunk([
DiffItem(remove, 1, (0, 1, 0, 0)),
DiffItem(insert, 2, (1, 1, 0, 1)),
DiffItem(unchanged, 4, (1, 2, 1, 2))
])
chunks = chunker(
diff_item_data_factory(q1, q2, lcs_markers)
)
self.assertEqual(next(chunks), chunk)
def test_only_unchanged(self):
q1 = deque([1, 2])
q2 = deque([1, 2])
lcs_markers = ((0, 0), (1, 1))
chunk_1 = Chunk([
DiffItem(unchanged, 1, (0, 1, 0, 1))
])
chunk_2 = Chunk([
DiffItem(unchanged, 2, (1, 2, 1, 2))
])
chunks = chunker(
diff_item_data_factory(q1, q2, lcs_markers)
)
self.assertEqual(next(chunks), chunk_1)
self.assertEqual(next(chunks), chunk_2)
def test_some_changes_after_an_unchanged_item(self):
q1 = deque([0, 1, 2])
q2 = deque([0, 3, 4])
lcs_marker = ((0, 0),)
chunk_1 = Chunk([
DiffItem(unchanged, 0, (0, 1, 0, 1))
])
chunk_2 = Chunk([
DiffItem(remove, 1, (1, 2, 1, 1)),
DiffItem(remove, 2, (2, 3, 1, 1)),
DiffItem(insert, 3, (3, 3, 1, 2)),
DiffItem(insert, 4, (3, 3, 2, 3))
])
chunks = chunker(
diff_item_data_factory(q1, q2, lcs_marker)
)
self.assertEqual(next(chunks), chunk_1)
self.assertEqual(next(chunks), chunk_2)
def test_empty_diff_block(self):
chunks = chunker(
diff_item_data_factory(deque([]), deque([]), ())
)
self.assertEqual(next(chunks), Chunk())
