Ensure that classes in the System.Windows.Forms namespace have adequate unit test coverage #13442

Please start with classes with coverage below 20% (marked in red in the codecov.io, and prioritize public and protected virtual methods.

Note: Some private classes cannot be tested

• Controls/Buttons:

  • ButtonRenderer.cs - 19.88% Add code coverage for ButtonRenderer #13745
  • ButtonFlatAdapter.cs – 14.91% Add code coverage for ButtonFlatAdapter #13743
  • ButtonPopupAdapter.cs – 16.39% Add code coverage for ButtonPopupAdapter #13731
  • CheckBoxBaseAdapter.cs – 16.97% Add code coverage for CheckBoxBaseAdapter #13752
  • CheckBoxFlatAdapter.cs – 4.48% Add code coverage for CheckBoxFlatAdapter #13751
  • CheckBoxPopupAdapter.cs – 2.59% Add unit test for CheckBoxPopupAdapter #13755
  • RadioButtonBaseAdapter.cs – 9.27% Add code coverage for RadioButtonBaseAdapter #13726
  • RadioButtonFlatAdapter.cs – 1.64%
  • RadioButtonPopupAdapter.cs – 1.52%

• DataGridView:

  • DataGridViewButtonCell.DataGridViewButtonCellRenderer.cs – 0.00% (private class)
  • DataGridViewButtonCell.cs – 6.16% Add code coverage for DataGridViewButtonCell #13667
  • DataGridViewCheckBoxCell.DataGridViewCheckBoxCellRenderer.cs – 0.00% (private class)
  • DataGridViewComboBoxCell.DataGridViewComboBoxCellRenderer.cs – 0.00% (private class)
  • DataGridViewComboBoxCell.cs – 15.49% Add code coverage for DataGridViewComboBoxCell #13654
  • DataGridViewComboBoxColumn.cs – 7.12% Add code coverage for DataGridViewComboBoxColumn #13617
  • DataGridViewImageCell.cs – 8.13% Add code coverage for DataGridViewImageCell #13616
  • DataGridViewImageColumn.cs – 11.18% Add code coverage for DataGridViewImageColumn #13547
  • DataGridViewLinkCell.cs – 11.97% Add code coverage for DataGridVieLinkCell #13524

• DateTimePicker:

  • DateTimePicker.EnumChildren.cs - 0% (private class)

• ImageList:

  • ImageListConverter.cs Add code coverage for ImageListConverter & RelatedImageListAttribute #13511

• ListView:

  • ListView.CheckedListViewItemCollection.cs – 18.34% Add unit test for ListView.CheckedListViewItemCollection file #13685
  • ListView.IconComparer.cs – 0.00% Add code coverage for ListView.IconComparer #13485
  • ListView.ListViewItemCollection.IInnerList.cs – 0.00%
  • ListViewItemStateImageIndexConverter.cs – 15.22% Add unit test for ListViewItemStateImageIndexConverter file #13716

• PropertyGrid/PropertyGridInternal:

  • ArrayElementGridEntry.cs – 0.00% Add unit test for ArrayElementGridEntry.cs file #13537
  • GridEntryRecreateChildrenEventArgs.cs – 0.00% Add unit test for GridEntryRecreateChildrenEventArgs.cs file #13497
  • GridToolTip.cs – 19.17% Add unit test for GridToolTip.cs file #13533
  • MergePropertyDescriptor.MultiMergeCollection.cs – 0.00% (private class)
  • MultiPropertyDescriptorGridEntry.cs – 6.77% Add code coverage for MultiPropertyDescriptorGridEntry #13713
  • PropertyDescriptorGridEntry.ExceptionConverter.cs – 0.00% (private class)
  • PropertyDescriptorGridEntry.ExceptionEditor.cs – 0.00% (private class)
  • PropertyGridCommands.cs – 0.00% Add unit test for PropertyGridCommands.cs file #13495

• Splitter:

  • Splitter.SplitterMessageFilter.cs - 0% (private class)

• TabControl:

  • TabRenderer.cs - 0% Add code coverage for TabRenderer #13482

• ToolStrips:

  • ToolStrip.RestoreFocusMessageFilter.cs – 14.81%
  • ToolStripContainer.ToolStripContainerTypedControlCollection.cs – 13.33% Add coverage for ToolStripContainer_ToolStripContainerTypedContro… #13527
  • ToolStripManager.ModalMenuFilter.HostedWindowsFormsMessageHook.cs – 0.00% Add code coverage for ToolStripManagerModalMenuFilterHostedWindowsFor… #13762
  • ToolStripPanel.FeedbackRectangle.FeedbackDropDown.cs – 0.00% (private class)
  • ToolStripPanel.FeedbackRectangle.cs – 0.00% (private class)
  • ToolStripProfessionalLowResolutionRenderer.cs – 0.00% Add code coverage for ToolStripProfessionalLowResolutionRenderer #13691

• UpDown:

  • DomainUpDown.DomainItemAccessibleObject.cs – 0.00% Add code coverage for DomainItemAccessibleObjectTests #13484
  • DomainUpDown.DomainUpDownAccessibleObject.cs – This class was obsoleted
  • UpDownBase.UpDownBaseAccessibleObject.cs – 16.67% Add code coverage for UpDownBase.UpDownBaseAccessibleObject #13498

• WebBrowser:

  • HtmlElementErrorEventArgs.cs – 0.00% Add unit test for HtmlElementErrorEventArgs.cs file #13512
  • HtmlHistory.cs – 0.00%
  • HtmlWindow.HTMLWindowEvents2.cs – 0.00% (private class)
  • WebBrowserContainer.cs – 11.70% Add tests for WebBrowserContainer #14006
  • WebBrowserUriTypeConverter.cs – 0.00% Add unit test for WebBrowserUriTypeConverter.cs file #13523