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from itertools import product
import pytest
from textual.app import App, ComposeResult
from textual.widgets import TextArea
from textual.widgets.text_area import Selection
TEST_TEXT = "\n".join(f"01234567890 - {n}" for n in range(10))
TEST_SELECTED_TEXT = "567890 - 0\n01234567890 - 1\n01234"
class TextAreaApp(App[None]):
def compose(self) -> ComposeResult:
yield TextArea(TEST_TEXT)
@pytest.mark.parametrize(
"selection, edit",
product(
[Selection((0, 5), (2, 5)), Selection((2, 5), (0, 5))],
["A", "delete", "backspace"],
),
)
async def test_issue_4301_reproduction(selection: Selection, edit: str) -> None:
"""Test https://github.com/Textualize/textual/issues/4301"""
async with (app := TextAreaApp()).run_test() as pilot:
assert app.query_one(TextArea).text == TEST_TEXT
app.query_one(TextArea).selection = selection
assert app.query_one(TextArea).selected_text == TEST_SELECTED_TEXT
await pilot.press(edit)
await pilot.press("ctrl+z")
assert app.query_one(TextArea).text == TEST_TEXT
# Note that the real test here is that the following code doesn't
# result in a crash; everything above should really be a given.
await pilot.press(*(["down"] * 10))
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