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from __future__ import annotations
import pytest
from textual.app import App, ComposeResult
from textual.css.query import NoMatches
from textual.widget import Widget
from textual.widgets import ContentSwitcher
class SwitcherApp(App[None]):
def __init__(self, initial: str | None = None) -> None:
super().__init__()
self._initial = initial
def compose(self) -> ComposeResult:
with ContentSwitcher(initial=self._initial):
for n in range(5):
yield Widget(id=f"w{n}")
async def test_no_initial_display() -> None:
"""Test starting a content switcher with nothing shown."""
async with SwitcherApp().run_test() as pilot:
assert pilot.app.query_one(ContentSwitcher).current is None
assert all(
not child.display for child in pilot.app.query_one(ContentSwitcher).children
)
assert pilot.app.query_one(ContentSwitcher).visible_content is None
async def test_initial_display() -> None:
"""Test starting a content switcher with a widget initially shown."""
async with SwitcherApp("w3").run_test() as pilot:
assert pilot.app.query_one(ContentSwitcher).current == "w3"
for child in pilot.app.query_one(ContentSwitcher).children:
assert child.display is (child.id == "w3")
assert pilot.app.query_one(
ContentSwitcher
).visible_content is pilot.app.query_one("#w3")
async def test_no_initial_display_then_set() -> None:
"""Test starting a content switcher with nothing shown then setting the display."""
async with SwitcherApp().run_test() as pilot:
assert pilot.app.query_one(ContentSwitcher).current is None
assert all(
not child.display for child in pilot.app.query_one(ContentSwitcher).children
)
assert pilot.app.query_one(ContentSwitcher).visible_content is None
pilot.app.query_one(ContentSwitcher).current = "w3"
assert pilot.app.query_one(ContentSwitcher).current == "w3"
for child in pilot.app.query_one(ContentSwitcher).children:
assert child.display is (child.id == "w3")
assert pilot.app.query_one(
ContentSwitcher
).visible_content is pilot.app.query_one("#w3")
async def test_initial_display_then_change() -> None:
"""Test starting a content switcher with a widget initially shown then changing it."""
async with SwitcherApp("w3").run_test() as pilot:
assert pilot.app.query_one(ContentSwitcher).current == "w3"
for child in pilot.app.query_one(ContentSwitcher).children:
assert child.display is (child.id == "w3")
assert pilot.app.query_one(
ContentSwitcher
).visible_content is pilot.app.query_one("#w3")
pilot.app.query_one(ContentSwitcher).current = "w2"
assert pilot.app.query_one(ContentSwitcher).current == "w2"
for child in pilot.app.query_one(ContentSwitcher).children:
assert child.display is (child.id == "w2")
assert pilot.app.query_one(
ContentSwitcher
).visible_content is pilot.app.query_one("#w2")
async def test_initial_display_then_hide() -> None:
"""Test starting a content switcher with a widget initially shown then hide all."""
async with SwitcherApp("w3").run_test() as pilot:
assert pilot.app.query_one(ContentSwitcher).current == "w3"
for child in pilot.app.query_one(ContentSwitcher).children:
assert child.display is (child.id == "w3")
pilot.app.query_one(ContentSwitcher).current = None
assert pilot.app.query_one(ContentSwitcher).current is None
assert all(
not child.display for child in pilot.app.query_one(ContentSwitcher).children
)
@pytest.mark.xfail(
reason="The expected exception doesn't appear to make it to pytest -- perhaps related to https://github.com/Textualize/textual/issues/1972"
)
async def test_initial_display_unknown_id() -> None:
"""Test setting an initial display to an unknown widget ID."""
with pytest.raises(NoMatches):
async with SwitcherApp("does-not-exist").run_test():
pass
async def test_set_current_to_unknown_id() -> None:
"""Test attempting to switch to an unknown widget ID."""
async with SwitcherApp().run_test() as pilot:
assert pilot.app.query_one(ContentSwitcher).current is None
assert all(
not child.display for child in pilot.app.query_one(ContentSwitcher).children
)
with pytest.raises(NoMatches):
pilot.app.query_one(ContentSwitcher).current = "does-not-exist"
async def test_add_content() -> None:
async with SwitcherApp().run_test() as pilot:
switcher = pilot.app.query_one(ContentSwitcher)
await switcher.add_content(Widget(id="foo"))
assert not switcher.query_one("#foo").display
await switcher.add_content(Widget(), id="bar", set_current=True)
assert not switcher.query_one("#foo").display
assert switcher.query_one("#bar").display
assert switcher.current == "bar"
with pytest.raises(ValueError):
switcher.add_content(Widget())
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