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

[LeafShi1]

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:

  • [x] ButtonRenderer.cs - 19.88% #13745
  • [x] ButtonFlatAdapter.cs – 14.91% #13743
  • [x] ButtonPopupAdapter.cs – 16.39% #13731
  • [x] CheckBoxBaseAdapter.cs – 16.97% #13752
  • [x] CheckBoxFlatAdapter.cs – 4.48% #13751
  • [x] CheckBoxPopupAdapter.cs – 2.59% #13755
  • [x] RadioButtonBaseAdapter.cs – 9.27% #13726
  • [ ] RadioButtonFlatAdapter.cs – 1.64%
  • [ ] RadioButtonPopupAdapter.cs – 1.52%

• DataGridView:

  • [x] ~~DataGridViewButtonCell.DataGridViewButtonCellRenderer.cs – 0.00%~~ (private class)
  • [x] DataGridViewButtonCell.cs – 6.16% #13667
  • [x] ~~DataGridViewCheckBoxCell.DataGridViewCheckBoxCellRenderer.cs – 0.00%~~ (private class)
  • [x] ~~DataGridViewComboBoxCell.DataGridViewComboBoxCellRenderer.cs – 0.00%~~ (private class)
  • [x] DataGridViewComboBoxCell.cs – 15.49% #13654
  • [x] DataGridViewComboBoxColumn.cs – 7.12% #13617
  • [x] DataGridViewImageCell.cs – 8.13% #13616
  • [x] DataGridViewImageColumn.cs – 11.18% #13547
  • [x] DataGridViewLinkCell.cs – 11.97% #13524

• DateTimePicker:

  • [x] ~~DateTimePicker.EnumChildren.cs - 0%~~ (private class)

• ImageList:

  • [x] ImageListConverter.cs #13511

• ListView:

  • [x] ListView.CheckedListViewItemCollection.cs – 18.34% #13685
  • [x] ListView.IconComparer.cs – 0.00% #13485
  • [ ] ListView.ListViewItemCollection.IInnerList.cs – 0.00%
  • [x] ListViewItemStateImageIndexConverter.cs – 15.22% #13716

• PropertyGrid/PropertyGridInternal:

  • [x] ArrayElementGridEntry.cs – 0.00% #13537
  • [x] GridEntryRecreateChildrenEventArgs.cs – 0.00% #13497
  • [x] GridToolTip.cs – 19.17% #13533
  • [x] ~~MergePropertyDescriptor.MultiMergeCollection.cs – 0.00%~~ (private class)
  • [x] MultiPropertyDescriptorGridEntry.cs – 6.77% #13713
  • [x] ~~PropertyDescriptorGridEntry.ExceptionConverter.cs – 0.00%~~ (private class)
  • [x] ~~PropertyDescriptorGridEntry.ExceptionEditor.cs – 0.00%~~ (private class)
  • [x] PropertyGridCommands.cs – 0.00% #13495

• Splitter:

  • [x] ~~Splitter.SplitterMessageFilter.cs - 0%~~ (private class)

• TabControl:

  • [x] TabRenderer.cs - 0% #13482

• ToolStrips:

  • [ ] ToolStrip.RestoreFocusMessageFilter.cs – 14.81%
  • [x] ToolStripContainer.ToolStripContainerTypedControlCollection.cs – 13.33% #13527
  • [x] ToolStripManager.ModalMenuFilter.HostedWindowsFormsMessageHook.cs – 0.00% #13762
  • [x] ~~ToolStripPanel.FeedbackRectangle.FeedbackDropDown.cs – 0.00%~~ (private class)
  • [x] ~~ToolStripPanel.FeedbackRectangle.cs – 0.00%~~ (private class)
  • [x] ToolStripProfessionalLowResolutionRenderer.cs – 0.00% #13691

• UpDown:

  • [x] DomainUpDown.DomainItemAccessibleObject.cs – 0.00% #13484
  • [x] ~~DomainUpDown.DomainUpDownAccessibleObject.cs~~ – This class was obsoleted
  • [x] UpDownBase.UpDownBaseAccessibleObject.cs – 16.67% #13498

• WebBrowser:

  • [x] HtmlElementErrorEventArgs.cs – 0.00% #13512
  • [ ] HtmlHistory.cs – 0.00%
  • [x] ~~HtmlWindow.HTMLWindowEvents2.cs – 0.00%~~ (private class)
  • [ ] WebBrowserContainer.cs – 11.70% #14006
  • [x] WebBrowserUriTypeConverter.cs – 0.00% #13523