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- import pytest
- from nicegui import Client, ui
- from nicegui.testing import Screen
- def test_run_javascript_on_button_press(screen: Screen):
- ui.button('change title', on_click=lambda: ui.run_javascript('document.title = "A New Title"'))
- screen.open('/')
- assert screen.selenium.title == 'NiceGUI'
- screen.click('change title')
- screen.wait(0.5)
- screen.should_contain('A New Title')
- def test_run_javascript_on_value_change(screen: Screen):
- @ui.page('/')
- async def page(client: Client):
- ui.radio(['A', 'B'], on_change=lambda e: ui.run_javascript(f'document.title = "Page {e.value}"'))
- await client.connected()
- ui.run_javascript('document.title = "Initial Title"')
- screen.open('/')
- screen.wait(0.5)
- screen.should_contain('Initial Title')
- screen.click('A')
- screen.wait(0.5)
- screen.should_contain('Page A')
- screen.click('B')
- screen.wait(0.5)
- screen.should_contain('Page B')
- def test_run_javascript_before_client_connected(screen: Screen):
- @ui.page('/')
- def page():
- ui.label('before js')
- with pytest.raises(RuntimeError):
- ui.run_javascript('document.title = "A New Title"')
- ui.label('after js')
- screen.open('/')
- assert screen.selenium.title == 'NiceGUI'
- screen.should_contain('before js')
- screen.should_contain('after js')
- def test_response_from_javascript(screen: Screen):
- async def compute() -> None:
- response = await ui.run_javascript('1 + 41')
- ui.label(response)
- ui.button('compute', on_click=compute)
- screen.open('/')
- screen.click('compute')
- screen.should_contain('42')
- def test_async_javascript(screen: Screen):
- async def run():
- result = await ui.run_javascript('await new Promise(r => setTimeout(r, 100)); return 42')
- ui.label(result)
- ui.button('run', on_click=run)
- screen.open('/')
- screen.click('run')
- screen.should_contain('42')
- def test_simultaneous_async_javascript(screen: Screen):
- async def runA():
- result = await ui.run_javascript('await new Promise(r => setTimeout(r, 500)); return 1')
- ui.label(f'A: {result}')
- async def runB():
- result = await ui.run_javascript('await new Promise(r => setTimeout(r, 250)); return 2')
- ui.label(f'B: {result}')
- ui.button('runA', on_click=runA)
- ui.button('runB', on_click=runB)
- screen.open('/')
- screen.click('runA')
- screen.click('runB')
- screen.should_contain('A: 1')
- screen.should_contain('B: 2')
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