add some comments

Author: gcampbell-msft

GoogleTestAdapter/Core/TestCases/TestCaseFactory.cs

@@ -234,6 +234,8 @@ private TestCase CreateTestCase(TestCaseDescriptor descriptor)
             var testCase = new TestCase(
                 descriptor.FullyQualifiedName, descriptor.FullyQualifiedName, _executable, descriptor.DisplayName, "", 0);
             testCase.Traits.AddRange(GetFinalTraits(descriptor.DisplayName, new List<Trait>()));
+
+            // Add the TestType for use in the executor when constructing the test key.
             testCase.Traits.Add(new Trait(nameof(TestCaseDescriptor.TestType), descriptor.TestType.ToString()));
             return testCase;
         }
@@ -262,12 +264,16 @@ private TestCase CreateTestCase(TestCaseDescriptor descriptor, TestCaseLocation
                 var testCase = new TestCase(
                     descriptor.FullyQualifiedName, ns + descriptor.FullyQualifiedName, _executable, descriptor.DisplayName, location.Sourcefile, (int)location.Line);
                 testCase.Traits.AddRange(GetFinalTraits(descriptor.DisplayName, location.Traits));
+
+                // Add the TestType for use in the executor when constructing the test key.
                 testCase.Traits.Add(new Trait(nameof(TestCaseDescriptor.TestType), descriptor.TestType.ToString()));
                 return testCase;
             }
 
             var returnTest = new TestCase(
                 descriptor.FullyQualifiedName, descriptor.FullyQualifiedName, _executable, descriptor.DisplayName, "", 0);
+
+            // Add the TestType for use in the executor when constructing the test key.
             returnTest.Traits.Add(new Trait(nameof(TestCaseDescriptor.TestType), descriptor.TestType.ToString()));
             _logger.LogWarning(String.Format(Resources.LocationNotFoundError, descriptor.FullyQualifiedName));
             return returnTest;