|
| 1 | +import pytest |
| 2 | +from qtpy.QtCore import QSize |
| 3 | +from qtpy.QtGui import QImage |
| 4 | + |
| 5 | +from napari_matplotlib import HistogramWidget, ScatterWidget, SliceWidget |
| 6 | + |
| 7 | + |
| 8 | +def _are_different(a: QImage, b: QImage) -> bool: |
| 9 | + """ |
| 10 | + Check that a and b are identical, pixel by pixel. Via a stupid nested for loop. |
| 11 | + """ |
| 12 | + assert not a.isNull() |
| 13 | + assert not b.isNull() |
| 14 | + assert a.size() == b.size() |
| 15 | + for x in range(a.width()): |
| 16 | + for y in range(a.height()): |
| 17 | + if a.pixel(x, y) != b.pixel(x, y): |
| 18 | + return True # exit quickly |
| 19 | + return False |
| 20 | + |
| 21 | + |
| 22 | +@pytest.mark.parametrize( |
| 23 | + "Widget", [HistogramWidget, ScatterWidget, SliceWidget] |
| 24 | +) |
| 25 | +def test_mpl_toolbar_buttons_checked(make_napari_viewer, Widget): |
| 26 | + """Test that the icons for checkable actions change when when a tool is selected. |
| 27 | +
|
| 28 | + A simple test of NapariNavigationToolbar._update_buttons_checked. Make sure the |
| 29 | + checked and unchecked icons are not the same. |
| 30 | + """ |
| 31 | + checkable_actions = ["Zoom", "Pan"] |
| 32 | + |
| 33 | + viewer = make_napari_viewer() |
| 34 | + widget = Widget(viewer) |
| 35 | + |
| 36 | + # search through all of the icons for the ones whose icons are expected to |
| 37 | + # change when checked |
| 38 | + for action in widget.toolbar.actions(): |
| 39 | + if action.text() in checkable_actions: |
| 40 | + assert action.isChecked() is False |
| 41 | + assert action.isCheckable() is True |
| 42 | + unchecked = action.icon().pixmap(QSize(48, 48)).toImage() |
| 43 | + |
| 44 | + # simulate the user click (QTest.mouseClick can't take a QAction) |
| 45 | + action.trigger() |
| 46 | + |
| 47 | + assert action.isChecked() is True |
| 48 | + checked = action.icon().pixmap(QSize(48, 48)).toImage() |
| 49 | + assert _are_different(unchecked, checked) |
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