Create and use SequenceEdit.TestAccessor

src/EditorFeatures/CSharpTest/EditAndContinue/SyntaxComparerTests.cs

@@ -28,7 +28,7 @@ public void GetSequenceEdits1()
                 new SequenceEdit(-1, 1),
                 new SequenceEdit(1, 0),
                 new SequenceEdit(0, -1),
-            }, edits, itemInspector: e => e.GetDebuggerDisplay());
+            }, edits, itemInspector: e => e.GetTestAccessor().GetDebuggerDisplay());
         }
 
         [Fact]
@@ -44,7 +44,7 @@ public void GetSequenceEdits2()
                 new SequenceEdit(-1, 1),
                 new SequenceEdit(1, 0),
                 new SequenceEdit(0, -1),
-            }, edits, itemInspector: e => e.GetDebuggerDisplay());
+            }, edits, itemInspector: e => e.GetTestAccessor().GetDebuggerDisplay());
         }
 
         [Fact]
@@ -60,7 +60,7 @@ public void GetSequenceEdits3()
                 new SequenceEdit(1, -1),
                 new SequenceEdit(0, 1),
                 new SequenceEdit(-1, 0),
-            }, edits, itemInspector: e => e.GetDebuggerDisplay());
+            }, edits, itemInspector: e => e.GetTestAccessor().GetDebuggerDisplay());
         }
 
         [Fact]
@@ -76,7 +76,7 @@ public void GetSequenceEdits4()
                 new SequenceEdit(1, -1),
                 new SequenceEdit(0, 1),
                 new SequenceEdit(-1, 0),
-            }, edits, itemInspector: e => e.GetDebuggerDisplay());
+            }, edits, itemInspector: e => e.GetTestAccessor().GetDebuggerDisplay());
         }
 
         [Fact]

src/EditorFeatures/VisualBasicTest/EditAndContinue/SyntaxComparerTests.vb

@@ -24,7 +24,7 @@ Namespace Microsoft.CodeAnalysis.VisualBasic.EditAndContinue.UnitTests
                 New SequenceEdit(-1, 1),
                 New SequenceEdit(1, 0),
                 New SequenceEdit(0, -1)
-            }, edits, itemInspector:=Function(e) e.GetDebuggerDisplay())
+            }, edits, itemInspector:=Function(e) e.GetTestAccessor().GetDebuggerDisplay())
         End Sub
 
         <Fact>
@@ -39,7 +39,7 @@ Namespace Microsoft.CodeAnalysis.VisualBasic.EditAndContinue.UnitTests
                 New SequenceEdit(-1, 1),
                 New SequenceEdit(1, 0),
                 New SequenceEdit(0, -1)
-            }, edits, itemInspector:=Function(e) e.GetDebuggerDisplay())
+            }, edits, itemInspector:=Function(e) e.GetTestAccessor().GetDebuggerDisplay())
         End Sub
 
         <Fact>
@@ -54,7 +54,7 @@ Namespace Microsoft.CodeAnalysis.VisualBasic.EditAndContinue.UnitTests
                 New SequenceEdit(1, -1),
                 New SequenceEdit(0, 1),
                 New SequenceEdit(-1, 0)
-            }, edits, itemInspector:=Function(e) e.GetDebuggerDisplay())
+            }, edits, itemInspector:=Function(e) e.GetTestAccessor().GetDebuggerDisplay())
         End Sub
 
         <Fact>
@@ -69,7 +69,7 @@ Namespace Microsoft.CodeAnalysis.VisualBasic.EditAndContinue.UnitTests
                 New SequenceEdit(1, -1),
                 New SequenceEdit(0, 1),
                 New SequenceEdit(-1, 0)
-            }, edits, itemInspector:=Function(e) e.GetDebuggerDisplay())
+            }, edits, itemInspector:=Function(e) e.GetTestAccessor().GetDebuggerDisplay())
         End Sub
 
         <Fact>

src/Workspaces/Core/Portable/Differencing/SequenceEdit.cs

@@ -72,8 +72,7 @@ public override int GetHashCode()
             return Hash.Combine(_oldIndex, _newIndex);
         }
 
-        // internal for testing
-        internal string GetDebuggerDisplay()
+        private string GetDebuggerDisplay()
         {
             string result = Kind.ToString();
             switch (Kind)
@@ -90,5 +89,21 @@ internal string GetDebuggerDisplay()
 
             return result;
         }
+
+        internal TestAccessor GetTestAccessor()
+            => new TestAccessor(this);
+
+        internal readonly struct TestAccessor
+        {
+            private readonly SequenceEdit _sequenceEdit;
+
+            public TestAccessor(SequenceEdit sequenceEdit)
+            {
+                _sequenceEdit = sequenceEdit;
+            }
+
+            internal string GetDebuggerDisplay()
+                => _sequenceEdit.GetDebuggerDisplay();
+        }
     }
 }