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* log * tests * snapshot tests * change to richlog * keep raw lines * disable highlighting by default * simplify * superfluous test * optimization * update cell length * add refresh * write method * version bump * doc fix link * makes lines private * docstring * relax dev dependancy * remove superfluous code [skip ci] * added FAQ [skipci] * fix code in faq [skipci] * fix typo * max lines fix
55 lines
1.6 KiB
Python
55 lines
1.6 KiB
Python
from threading import Thread
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import pytest
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from textual.app import App, ComposeResult
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from textual.widgets import RichLog
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def test_call_from_thread_app_not_running():
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app = App()
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# Should fail if app is not running
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with pytest.raises(RuntimeError):
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app.call_from_thread(print)
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def test_call_from_thread():
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"""Test the call_from_thread method."""
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class BackgroundThread(Thread):
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"""A background thread which will modify app in some way."""
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def __init__(self, app: App[object]) -> None:
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self.app = app
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super().__init__()
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def run(self) -> None:
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def write_stuff(text: str) -> None:
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"""Write stuff to a widget."""
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self.app.query_one(RichLog).write(text)
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self.app.call_from_thread(write_stuff, "Hello")
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# Exit the app with a code we can assert
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self.app.call_from_thread(self.app.exit, 123)
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class ThreadTestApp(App[object]):
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"""Trivial app with a single widget."""
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def compose(self) -> ComposeResult:
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yield RichLog()
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def on_ready(self) -> None:
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"""Launch a thread which will modify the app."""
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try:
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self.call_from_thread(print)
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except RuntimeError as error:
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# Calling this from the same thread as the app is an error
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self._runtime_error = error
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BackgroundThread(self).start()
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app = ThreadTestApp()
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result = app.run(headless=True, size=(80, 24))
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assert isinstance(app._runtime_error, RuntimeError)
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assert result == 123
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