Add description of debugging test unit (#20494)

* Fix minor output

* Add Debug tests

* Update docs/core/tutorials/testing-library-with-visual-studio-code.md

Co-authored-by: David Pine <david.pine@microsoft.com>

* Update docs/core/tutorials/testing-library-with-visual-studio-code.md

* Add description of debug tests

Co-authored-by: David Pine <david.pine@microsoft.com>

docs/core/tutorials/testing-library-with-visual-studio-code.md

@@ -114,7 +114,7 @@ To create the test methods:
    Test Run Successful.
    Total tests: 3
         Passed: 3
-   Total time: 5.1116 Seconds
+    Total time: 5.1116 Seconds
    ```
 
 ## Handle test failures
@@ -144,14 +144,14 @@ If you're doing test-driven development (TDD), you write tests first and they fa
      Error Message:
       Assert.IsFalse failed. Expected for 'Error': false; Actual: True
      Stack Trace:
-     at StringLibraryTest.UnitTest1.TestDoesNotStartWithUpper()
-       in C:\Projects\ClassLibraryProjects\StringLibraryTest\UnitTest1.cs:line 33
+        at StringLibraryTest.UnitTest1.TestDoesNotStartWithUpper() in C:\
+   Projects\ClassLibraryProjects\StringLibraryTest\UnitTest1.cs:line 33
 
    Test Run Failed.
    Total tests: 3
         Passed: 2
         Failed: 1
-   Total time: 1.7825 Seconds
+    Total time: 1.7825 Seconds
    ```
 
 1. Remove the string "Error" that you added in step 1. Rerun the test and the tests pass.
@@ -168,6 +168,12 @@ Now that the tests have all passed when running the Debug build of the library,
 
    The tests pass.
 
+## Debug tests
+
+If you're using Visual Studio Code as your IDE, you can use the same process shown in [Debug a .NET Core console application using Visual Studio Code](debugging-with-visual-studio-code.md) to debug code using your unit test project. Instead of starting the *ShowCase* app project, open *StringLibraryTest/UnitTest1.cs*, and select **Run All Tests** between lines 7 and 8. If you're unable to find it, press <kbd>Ctrl</kbd>+<kbd>Shift</kbd>+<kbd>P</kbd> to open the command palette and enter **Reload Window**.
+
+Visual Studio Code starts the test project with the debugger attached. Execution will stop at any breakpoint you've added to the test project or the underlying library code.
+
 ## Additional resources
 
 * [Unit testing in .NET Core and .NET Standard](../testing/index.md)

docs/core/tutorials/testing-library-with-visual-studio-mac.md

@@ -159,7 +159,9 @@ To test the Release build:
 
 ## Debug tests
 
-You can use the same process shown in [Tutorial: Debug a .NET Core console application using Visual Studio for Mac](debugging-with-visual-studio-mac.md) to debug code using your unit test project. Instead of starting the ShowCase app project, <kbd>ctrl</kbd>-click the **StringLibraryTests** project, and select **Start Debugging Project** from the context menu. Visual Studio starts the test project with the debugger attached. Execution will stop at any breakpoint you've added to the test project or the underlying library code.
+If you're using Visual Studio for Mac as your IDE, you can use the same process shown in [Tutorial: Debug a .NET Core console application using Visual Studio for Mac](debugging-with-visual-studio-mac.md) to debug code using your unit test project. Instead of starting the *ShowCase* app project, <kbd>ctrl</kbd>-click the **StringLibraryTests** project, and select **Start Debugging Project** from the context menu.
+
+Visual Studio starts the test project with the debugger attached. Execution will stop at any breakpoint you've added to the test project or the underlying library code.
 
 ## Additional resources
 

docs/core/tutorials/testing-library-with-visual-studio.md

@@ -181,6 +181,12 @@ To test the Release build:
 
 1. Run the unit tests by choosing **Test Run** > **All Tests** from the menu bar. The tests pass.
 
+## Debug tests
+
+If you're using Visual Studio as your IDE, you can use the same process shown in [Tutorial: Debug a .NET Core console application using Visual Studio](debugging-with-visual-studio.md) to debug code using your unit test project. Instead of starting the *ShowCase* app project, right-click the **StringLibraryTests** project, and select **Debug Tests** from the context menu.
+
+Visual Studio starts the test project with the debugger attached. Execution will stop at any breakpoint you've added to the test project or the underlying library code.
+
 ## Additional resources
 
 * [Unit test basics - Visual Studio](/visualstudio/test/unit-test-basics)