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Use monkeypatch
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@ -59,15 +59,12 @@ def test_show(mode: str) -> None:
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assert ImageShow.show(im)
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assert ImageShow.show(im)
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def test_show_without_viewers() -> None:
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def test_show_without_viewers(monkeypatch: pytest.MonkeyPatch) -> None:
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viewers = ImageShow._viewers
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monkeypatch.setattr(ImageShow, "_viewers", [])
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ImageShow._viewers = []
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with hopper() as im:
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with hopper() as im:
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assert not ImageShow.show(im)
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assert not ImageShow.show(im)
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ImageShow._viewers = viewers
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@pytest.mark.parametrize(
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@pytest.mark.parametrize(
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"viewer",
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"viewer",
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