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80 lines
2.1 KiB
Python
80 lines
2.1 KiB
Python
import pytest
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from textual.app import App, ScreenStackError
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from textual.screen import Screen
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@pytest.mark.asyncio
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async def test_screens():
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app = App()
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app._set_active()
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with pytest.raises(ScreenStackError):
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app.screen
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assert not app._installed_screens
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screen1 = Screen(name="screen1")
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screen2 = Screen(name="screen2")
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screen3 = Screen(name="screen3")
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# installs screens
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app.install_screen(screen1, "screen1")
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app.install_screen(screen2, "screen2")
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# Check they are installed
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assert app.is_screen_installed("screen1")
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assert app.is_screen_installed("screen2")
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assert app.get_screen("screen1") is screen1
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with pytest.raises(KeyError):
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app.get_screen("foo")
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# Check screen3 is not installed
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assert not app.is_screen_installed("screen3")
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# Installs screen3
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app.install_screen(screen3, "screen3")
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# Confirm installed
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assert app.is_screen_installed("screen3")
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# Check screen stack is empty
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assert app.screen_stack == []
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# Push a screen
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app.push_screen("screen1")
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# Check it is on the stack
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assert app.screen_stack == [screen1]
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# Check it is current
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assert app.screen is screen1
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# Switch to another screen
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app.switch_screen("screen2")
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# Check it has changed the stack and that it is current
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assert app.screen_stack == [screen2]
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assert app.screen is screen2
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# Push another screen
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app.push_screen("screen3")
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assert app.screen_stack == [screen2, screen3]
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assert app.screen is screen3
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# Pop a screen
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assert app.pop_screen() is screen3
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assert app.screen is screen2
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assert app.screen_stack == [screen2]
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# Uninstall screens
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app.uninstall_screen(screen1)
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assert not app.is_screen_installed(screen1)
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app.uninstall_screen("screen3")
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assert not app.is_screen_installed(screen1)
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# Check we can't uninstall a screen on the stack
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with pytest.raises(ScreenStackError):
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app.uninstall_screen(screen2)
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# Check we can't pop last screen
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with pytest.raises(ScreenStackError):
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app.pop_screen()
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