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Adds a method to Widget that allows moving a child of that widget within its list of children. Options are to move before or after a specific location, or a sibling widget. Seeks to implement #1121.
101 lines
3.8 KiB
Python
101 lines
3.8 KiB
Python
import pytest
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from textual.app import App
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from textual.widget import Widget, WidgetError
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async def test_widget_move_child() -> None:
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"""Test moving a widget in a child list."""
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# Test calling move_child with no direction.
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async with App().run_test() as pilot:
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child = Widget(Widget())
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await pilot.app.mount(child)
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with pytest.raises(WidgetError):
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pilot.app.screen.move_child(child)
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# Test calling move_child with more than one direction.
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async with App().run_test() as pilot:
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child = Widget(Widget())
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await pilot.app.mount(child)
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with pytest.raises(WidgetError):
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pilot.app.screen.move_child(child, before=1, after=2)
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# Test attempting to move a child that isn't ours.
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async with App().run_test() as pilot:
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child = Widget(Widget())
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await pilot.app.mount(child)
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with pytest.raises(WidgetError):
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pilot.app.screen.move_child(Widget(), before=child)
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# Test attempting to move relative to a widget that isn't a child.
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async with App().run_test() as pilot:
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child = Widget(Widget())
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await pilot.app.mount(child)
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with pytest.raises(WidgetError):
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pilot.app.screen.move_child(child, before=Widget())
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# Make a background set of widgets.
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widgets = [Widget(id=f"widget-{n}") for n in range( 10 )]
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# Test attempting to move past the end of the child list.
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async with App().run_test() as pilot:
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container = Widget(*widgets)
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await pilot.app.mount(container)
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with pytest.raises(WidgetError):
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container.move_child(widgets[0], before=len(widgets)+10)
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# Test attempting to move before the end of the child list.
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async with App().run_test() as pilot:
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container = Widget(*widgets)
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await pilot.app.mount(container)
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with pytest.raises(WidgetError):
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container.move_child(widgets[0], before=-(len(widgets)+10))
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# Test the different permutations of moving one widget before another.
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perms = (
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( 1, 0 ),
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( widgets[1], 0 ),
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( 1, widgets[ 0 ] ),
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( widgets[ 1 ], widgets[ 0 ])
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)
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for child, target in perms:
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async with App().run_test() as pilot:
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container = Widget(*widgets)
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await pilot.app.mount(container)
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container.move_child(child, before=target)
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assert container.children[0].id == "widget-1"
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assert container.children[1].id == "widget-0"
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assert container.children[2].id == "widget-2"
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# Test the different permutations of moving one widget after another.
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perms = (
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( 0, 1 ),
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( widgets[0], 1 ),
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( 0, widgets[ 1 ] ),
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( widgets[ 0 ], widgets[ 1 ])
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)
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for child, target in perms:
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async with App().run_test() as pilot:
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container = Widget(*widgets)
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await pilot.app.mount(container)
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container.move_child(child, after=target)
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assert container.children[0].id == "widget-1"
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assert container.children[1].id == "widget-0"
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assert container.children[2].id == "widget-2"
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# Test moving after a child after the last child.
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async with App().run_test() as pilot:
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container = Widget(*widgets)
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await pilot.app.mount(container)
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container.move_child(widgets[0], after=widgets[-1])
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assert container.children[0].id == "widget-1"
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assert container.children[-1].id == "widget-0"
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# Test moving after a child after the last child's numeric position.
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async with App().run_test() as pilot:
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container = Widget(*widgets)
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await pilot.app.mount(container)
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container.move_child(widgets[0], after=widgets[9])
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assert container.children[0].id == "widget-1"
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assert container.children[-1].id == "widget-0"
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