Fixed database typo and removed unnecessary class identifier.

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

@@ -0,0 +1,40 @@
+from skimage.viewer import utils
+from skimage.viewer.utils import dialogs
+from skimage.viewer.qt import QtCore, QtWidgets, has_qt
+from skimage._shared import testing
+
+
+@testing.skipif(not has_qt, reason="Qt not installed")
+def test_event_loop():
+    utils.init_qtapp()
+    timer = QtCore.QTimer()
+    timer.singleShot(10, QtWidgets.QApplication.quit)
+    utils.start_qtapp()
+
+
+@testing.skipif(not has_qt, reason="Qt not installed")
+def test_format_filename():
+    fname = dialogs._format_filename(('apple', 2))
+    assert fname == 'apple'
+    fname = dialogs._format_filename('')
+    assert fname is None
+
+
+@testing.skipif(True, reason="Can't automatically close window. See #3081.")
+@testing.skipif(not has_qt, reason="Qt not installed")
+def test_open_file_dialog():
+    QApp = utils.init_qtapp()
+    timer = QtCore.QTimer()
+    timer.singleShot(100, lambda: QApp.quit())
+    filename = dialogs.open_file_dialog()
+    assert filename is None
+
+
+@testing.skipif(True, reason="Can't automatically close window. See #3081.")
+@testing.skipif(not has_qt, reason="Qt not installed")
+def test_save_file_dialog():
+    QApp = utils.init_qtapp()
+    timer = QtCore.QTimer()
+    timer.singleShot(100, lambda: QApp.quit())
+    filename = dialogs.save_file_dialog()
+    assert filename is None