Fixed database typo and removed unnecessary class identifier.

venv/Lib/site-packages/skimage/viewer/tests/test_viewer.py

@@ -0,0 +1,79 @@
+from skimage import data
+from skimage.transform import pyramid_gaussian
+from skimage.filters import sobel
+
+from skimage.viewer.qt import QtGui, QtCore, has_qt
+from skimage.viewer import ImageViewer, CollectionViewer
+from skimage.viewer.plugins import OverlayPlugin
+
+from skimage._shared.version_requirements import is_installed
+from skimage._shared import testing
+from skimage._shared.testing import assert_equal
+
+
+@testing.skipif(not has_qt, reason="Qt not installed")
+def test_viewer():
+    astro = data.astronaut()
+    coins = data.coins()
+
+    view = ImageViewer(astro)
+    import tempfile
+    _, filename = tempfile.mkstemp(suffix='.png')
+
+    view.show(False)
+    view.close()
+    view.save_to_file(filename)
+    view.open_file(filename)
+    assert_equal(view.image, astro)
+    view.image = coins
+    assert_equal(view.image, coins),
+    view.save_to_file(filename),
+    view.open_file(filename),
+    view.reset_image(),
+    assert_equal(view.image, coins)
+
+
+def make_key_event(key):
+    return QtGui.QKeyEvent(QtCore.QEvent.KeyPress, key,
+                           QtCore.Qt.NoModifier)
+
+
+@testing.skipif(not has_qt, reason="Qt not installed")
+def test_collection_viewer():
+
+    img = data.astronaut()
+    img_collection = tuple(pyramid_gaussian(img, multichannel=True))
+
+    view = CollectionViewer(img_collection)
+    make_key_event(48)
+
+    view.update_index('', 2),
+    assert_equal(view.image, img_collection[2])
+    view.keyPressEvent(make_key_event(53))
+    assert_equal(view.image, img_collection[5])
+    view._format_coord(10, 10)
+
+
+@testing.skipif(not has_qt, reason="Qt not installed")
+@testing.skipif(not is_installed('matplotlib', '>=1.2'),
+                reason="matplotlib < 1.2")
+def test_viewer_with_overlay():
+    img = data.coins()
+    ov = OverlayPlugin(image_filter=sobel)
+    viewer = ImageViewer(img)
+    viewer += ov
+
+    import tempfile
+    _, filename = tempfile.mkstemp(suffix='.png')
+
+    ov.color = 3
+    assert_equal(ov.color, 'yellow')
+
+    viewer.save_to_file(filename)
+    ov.display_filtered_image(img)
+    assert_equal(ov.overlay, img)
+    ov.overlay = None
+    assert_equal(ov.overlay, None)
+    ov.overlay = img
+    assert_equal(ov.overlay, img)
+    assert_equal(ov.filtered_image, img)