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from textual.app import App
from textual.screen import Screen
from textual.widgets import Header
async def test_screen_title_none_is_ignored():
class MyScreen(Screen):
def compose(self):
yield Header()
class MyApp(App):
TITLE = "app title"
def on_mount(self):
self.push_screen(MyScreen())
app = MyApp()
async with app.run_test():
assert app.query_one("HeaderTitle").text == "app title"
async def test_screen_title_overrides_app_title():
class MyScreen(Screen):
TITLE = "screen title"
def compose(self):
yield Header()
class MyApp(App):
TITLE = "app title"
def on_mount(self):
self.push_screen(MyScreen())
app = MyApp()
async with app.run_test():
assert app.query_one("HeaderTitle").text == "screen title"
async def test_screen_title_reactive_updates_title():
class MyScreen(Screen):
TITLE = "screen title"
def compose(self):
yield Header()
class MyApp(App):
TITLE = "app title"
def on_mount(self):
self.push_screen(MyScreen())
app = MyApp()
async with app.run_test() as pilot:
app.screen.title = "new screen title"
await pilot.pause()
assert app.query_one("HeaderTitle").text == "new screen title"
async def test_app_title_reactive_does_not_update_title_when_screen_title_is_set():
class MyScreen(Screen):
TITLE = "screen title"
def compose(self):
yield Header()
class MyApp(App):
TITLE = "app title"
def on_mount(self):
self.push_screen(MyScreen())
app = MyApp()
async with app.run_test() as pilot:
app.title = "new app title"
await pilot.pause()
assert app.query_one("HeaderTitle").text == "screen title"
async def test_screen_sub_title_none_is_ignored():
class MyScreen(Screen):
def compose(self):
yield Header()
class MyApp(App):
SUB_TITLE = "app sub-title"
def on_mount(self):
self.push_screen(MyScreen())
app = MyApp()
async with app.run_test():
assert app.query_one("HeaderTitle").sub_text == "app sub-title"
async def test_screen_sub_title_overrides_app_sub_title():
class MyScreen(Screen):
SUB_TITLE = "screen sub-title"
def compose(self):
yield Header()
class MyApp(App):
SUB_TITLE = "app sub-title"
def on_mount(self):
self.push_screen(MyScreen())
app = MyApp()
async with app.run_test():
assert app.query_one("HeaderTitle").sub_text == "screen sub-title"
async def test_screen_sub_title_reactive_updates_sub_title():
class MyScreen(Screen):
SUB_TITLE = "screen sub-title"
def compose(self):
yield Header()
class MyApp(App):
SUB_TITLE = "app sub-title"
def on_mount(self):
self.push_screen(MyScreen())
app = MyApp()
async with app.run_test() as pilot:
app.screen.sub_title = "new screen sub-title"
await pilot.pause()
assert app.query_one("HeaderTitle").sub_text == "new screen sub-title"
async def test_app_sub_title_reactive_does_not_update_sub_title_when_screen_sub_title_is_set():
class MyScreen(Screen):
SUB_TITLE = "screen sub-title"
def compose(self):
yield Header()
class MyApp(App):
SUB_TITLE = "app sub-title"
def on_mount(self):
self.push_screen(MyScreen())
app = MyApp()
async with app.run_test() as pilot:
app.sub_title = "new app sub-title"
await pilot.pause()
assert app.query_one("HeaderTitle").sub_text == "screen sub-title"
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