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import pytest
from textual.app import App
from textual.screen import Screen
from textual.widgets import Footer, Header, Input
class MyScreen(Screen):
def compose(self):
yield Header()
yield Input()
yield Footer()
class MyApp(App):
def on_mount(self):
self.install_screen(MyScreen(), "myscreen")
self.push_screen("myscreen")
async def test_freeze():
"""Regression test for https://github.com/Textualize/textual/issues/1608"""
app = MyApp()
with pytest.raises(Exception):
async with app.run_test():
raise Exception("never raised")
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