File size: 2,371 Bytes
2c3c408 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 | import sys
import pytest
from textual.app import App, ScreenStackError
from textual.screen import Screen
skip_py310 = pytest.mark.skipif(
sys.version_info.minor == 10 and sys.version_info.major == 3,
reason="segfault on py3.10",
)
@skip_py310
@pytest.mark.asyncio
async def test_screens():
app = App()
app._set_active()
with pytest.raises(ScreenStackError):
app.screen
assert not app._installed_screens
screen1 = Screen(name="screen1")
screen2 = Screen(name="screen2")
screen3 = Screen(name="screen3")
# installs screens
app.install_screen(screen1, "screen1")
app.install_screen(screen2, "screen2")
# Check they are installed
assert app.is_screen_installed("screen1")
assert app.is_screen_installed("screen2")
assert app.get_screen("screen1") is screen1
with pytest.raises(KeyError):
app.get_screen("foo")
# Check screen3 is not installed
assert not app.is_screen_installed("screen3")
# Installs screen3
app.install_screen(screen3, "screen3")
# Confirm installed
assert app.is_screen_installed("screen3")
# Check screen stack is empty
assert app.screen_stack == []
# Push a screen
app.push_screen("screen1")
# Check it is on the stack
assert app.screen_stack == [screen1]
# Check it is current
assert app.screen is screen1
# Switch to another screen
app.switch_screen("screen2")
# Check it has changed the stack and that it is current
assert app.screen_stack == [screen2]
assert app.screen is screen2
# Push another screen
app.push_screen("screen3")
assert app.screen_stack == [screen2, screen3]
assert app.screen is screen3
# Pop a screen
assert app.pop_screen() is screen3
assert app.screen is screen2
assert app.screen_stack == [screen2]
# Uninstall screens
app.uninstall_screen(screen1)
assert not app.is_screen_installed(screen1)
app.uninstall_screen("screen3")
assert not app.is_screen_installed(screen1)
# Check we can't uninstall a screen on the stack
with pytest.raises(ScreenStackError):
app.uninstall_screen(screen2)
# Check we can't pop last screen
with pytest.raises(ScreenStackError):
app.pop_screen()
screen1.remove()
screen2.remove()
screen3.remove()
await app.shutdown()
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