Add unit test for Link label

[LeafShi1]

Add unit tests for PR#10642

Using the following code in a .net core project reproduces issue #10515,

• When the linkLabel.Text is null or empty, the code Application.DoEvents(); will enter an infinite loop before PR#10642

 LinkLabel linkLabel = new();
 // try to comment out  this line 'linkLabel.Text = "2";'
 // and observe the result after click the button
 linkLabel.Text = "";

this.Controls.Add(linkLabel);
this.Invalidate();
Application.DoEvents(); 

MessageBox.Show("button1_Click");

However, Application.DoEvents(); is invalid when used in Unit test, so additional tests need to be added for PR##10642

[RussKie]

You shouldn't be calling Application.DoEvents() nor using MessageBox API (since those aren't test-friendly) in tests.

From the provided snippet it's not clear what exactly it asserts, and that's likely the underlying issue.

[LeafShi1]

You shouldn't be calling Application.DoEvents() nor using MessageBox API (since those aren't test-friendly) in tests.

From the provided snippet it's not clear what exactly it asserts, and that's likely the underlying issue.

Yes, you are right. The above code is not a correct test case, it is only used to reproduce the problem. I changed the description of the problem.

This issue is now marked as "help wanted", and we’re looking for a community volunteer to work on this issue. If we receive no interest in 180 days, we will close the issue. To learn more about how we handle feature requests, please see our documentation.

Happy Coding!

[adeoyeenocholamilekan]

I'm interested in solving this problem

[Tanya-Solyanik]

Thank you @adeoyeenocholamilekan! The issue is assigned to you, please submit a PR. We'll be happy to guide you if you need any assistance.

[adeoyeenocholamilekan]

Okay, thank you