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from textual import on
from textual.app import App
from textual.widgets import Select
from textual.widgets._select import SelectOverlay
class SelectApp(App[None]):
def __init__(self):
self.changed_messages = []
super().__init__()
def compose(self):
yield Select[int]([(str(n), n) for n in range(3)])
@on(Select.Changed)
def add_message(self, event):
self.changed_messages.append(event)
async def test_message_control():
app = SelectApp()
async with app.run_test() as pilot:
await pilot.click(Select)
await pilot.click(SelectOverlay, offset=(2, 3))
await pilot.pause()
message = app.changed_messages[0]
assert message.control is app.query_one(Select)
async def test_selecting_posts_message():
app = SelectApp()
async with app.run_test() as pilot:
await pilot.click(Select)
# Click on the 1.
await pilot.click(SelectOverlay, offset=(2, 3))
await pilot.pause()
assert len(app.changed_messages) == 1
await pilot.click(Select)
# Click on the 2.
await pilot.click(SelectOverlay, offset=(2, 4))
await pilot.pause()
assert len(app.changed_messages) == 2
async def test_same_selection_does_not_post_message():
app = SelectApp()
async with app.run_test() as pilot:
await pilot.click(Select)
# Click on the 1.
await pilot.click(SelectOverlay, offset=(2, 3))
await pilot.pause()
assert len(app.changed_messages) == 1
await pilot.click(Select)
# Click on the 1 again...
await pilot.click(SelectOverlay, offset=(2, 3))
await pilot.pause()
assert len(app.changed_messages) == 1
async def test_setting_value_posts_message() -> None:
"""Setting the value of a Select should post a message."""
async with (app := SelectApp()).run_test() as pilot:
assert len(app.changed_messages) == 0
app.query_one(Select).value = 2
await pilot.pause()
assert len(app.changed_messages) == 1
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