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from unittest import mock
import pytest
from meld.meldbuffer import BufferLines, MeldBuffer
text = ("""0
1
2
3
4
5
6
7
8
9
10""")
@pytest.fixture(scope='module', autouse=True)
def mock_bind_settings():
with mock.patch('meld.meldbuffer.bind_settings', mock.DEFAULT):
yield
@pytest.fixture
def buffer_setup():
buf = MeldBuffer()
buf.set_text(text)
buffer_lines = BufferLines(buf)
yield buf, buffer_lines
@pytest.mark.parametrize("line_start, line_end, expected_text", [
(0, 1, ["0"],),
(0, 2, ["0", "1"],),
# zero-sized slice
(9, 9, [],),
(9, 10, ["9"],),
(9, 11, ["9", "10"],),
# Past the end of the buffer
(9, 12, ["9", "10"],),
# Waaaay past the end of the buffer
(9, 9999, ["9", "10"],),
# And sidling towards past-the-end start indices
(10, 12, ["10"],),
(11, 12, [],),
])
def test_meld_buffer_slicing(
line_start, line_end, expected_text, buffer_setup):
buffer, buffer_lines = buffer_setup
assert buffer_lines[line_start:line_end] == expected_text
def test_meld_buffer_index_out_of_range(buffer_setup):
buffer, buffer_lines = buffer_setup
with pytest.raises(IndexError):
buffer_lines[11]
def test_meld_buffer_cached_contents(buffer_setup):
buffer, buffer_lines = buffer_setup
text_lines = text.splitlines()
assert len(buffer_lines.lines) == len(buffer_lines) == len(text_lines)
# Check that without access, we have no cached contents
assert buffer_lines.lines == [None] * len(text_lines)
# Access the lines so that they're cached
buffer_lines[:]
# Note that this only happens to be true for our simple text; if
# it were true in general, we wouldn't need the complexities of the
# BufferLines class.
assert buffer_lines.lines == text_lines
def test_meld_buffer_insert_text(buffer_setup):
buffer, buffer_lines = buffer_setup
# Access the lines so that they're cached
buffer_lines[:]
assert buffer_lines.lines[4:8] == ["4", "5", "6", "7"]
# Delete from the start of line 5 to the start of line 7,
# invalidating line 7 but leaving its contents intact.
buffer.insert(
buffer.get_iter_at_line(5),
"hey\nthings",
)
assert buffer_lines.lines[4:8] == ["4", None, None, "6"]
assert buffer_lines[5:7] == ["hey", "things5"]
assert buffer_lines.lines[4:8] == ["4", "hey", "things5", "6"]
def test_meld_buffer_delete_range(buffer_setup):
buffer, buffer_lines = buffer_setup
# Access the lines so that they're cached
buffer_lines[:]
assert buffer_lines.lines[4:8] == ["4", "5", "6", "7"]
# Delete from the start of line 5 to the start of line 7,
# invalidating line 7 but leaving its contents intact.
buffer.delete(
buffer.get_iter_at_line(5),
buffer.get_iter_at_line(7),
)
assert buffer_lines.lines[4:7] == ["4", None, "8"]
assert buffer_lines[5] == "7"
assert buffer_lines.lines[4:7] == ["4", "7", "8"]
def test_meld_buffer_cache_debug(caplog, buffer_setup):
buffer, buffer_lines = buffer_setup
buffer_lines = BufferLines(buffer, cache_debug=True)
# Invalidate our line cache...
buffer_lines.lines.append("invalid")
# ...and check that insertion/deletion logs an error
buffer.insert(
buffer.get_iter_at_line(5),
"hey",
)
assert len(caplog.records) == 1
assert caplog.records[0].msg.startswith("Cache line count does not match")
caplog.clear()
buffer.delete(
buffer.get_iter_at_line(5),
buffer.get_iter_at_line(7),
)
assert len(caplog.records) == 1
assert caplog.records[0].msg.startswith("Cache line count does not match")
|
