46 lines
1.5 KiB
Python
46 lines
1.5 KiB
Python
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# Copyright (c) Jupyter Development Team.
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# Distributed under the terms of the Modified BSD License.
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"""Test Widget."""
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from IPython.core.interactiveshell import InteractiveShell
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from IPython.display import display
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from IPython.utils.capture import capture_output
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from ..widget import Widget
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from ..widget_button import Button
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def test_no_widget_view():
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# ensure IPython shell is instantiated
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# otherwise display() just calls print
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shell = InteractiveShell.instance()
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with capture_output() as cap:
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w = Widget()
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display(w)
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assert len(cap.outputs) == 1, "expect 1 output"
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mime_bundle = cap.outputs[0].data
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assert mime_bundle['text/plain'] == repr(w), "expected plain text output"
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assert 'application/vnd.jupyter.widget-view+json' not in mime_bundle, "widget has no view"
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assert cap.stdout == '', repr(cap.stdout)
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assert cap.stderr == '', repr(cap.stderr)
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def test_widget_view():
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# ensure IPython shell is instantiated
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# otherwise display() just calls print
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shell = InteractiveShell.instance()
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with capture_output() as cap:
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w = Button()
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display(w)
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assert len(cap.outputs) == 1, "expect 1 output"
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mime_bundle = cap.outputs[0].data
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assert mime_bundle['text/plain'] == repr(w), "expected plain text output"
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assert 'application/vnd.jupyter.widget-view+json' in mime_bundle, "widget should have have a view"
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assert cap.stdout == '', repr(cap.stdout)
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assert cap.stderr == '', repr(cap.stderr)
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