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