Add test to find variable defn with special chars in name

Author: Kapil Borle

test/PowerShellEditorServices.Test.Host/LanguageServerTests.cs

@@ -485,6 +485,36 @@ await this.SendRequest(
             Assert.Equal(20, locations[0].Range.End.Character);
         }
 
+        [Fact]
+        public async Task FindDefinitionOfVariableWithSpecialChars()
+        {
+            await this.SendOpenFileEvent("TestFiles\\FindReferences.ps1");
+
+            Location[] locations =
+                await this.SendRequest(
+                    DefinitionRequest.Type,
+                    new TextDocumentPositionParams
+                    {
+                        TextDocument = new TextDocumentIdentifier
+                        {
+                            Uri = "TestFiles\\FindReferences.ps1"
+                        },
+                        Position = new Position
+                        {
+                            Line = 18,
+                            Character = 24,
+                        }
+                    });
+
+            Assert.NotNull(locations);
+            Assert.Equal(1, locations.Length);
+            Assert.EndsWith("FindReferences.ps1", locations[0].Uri);
+            Assert.Equal(17, locations[0].Range.Start.Line);
+            Assert.Equal(0, locations[0].Range.Start.Character);
+            Assert.Equal(17, locations[0].Range.End.Line);
+            Assert.Equal(27, locations[0].Range.End.Character);
+        }
+
         [Fact]
         public async Task FindsOccurencesOnFunctionDefinition()
         {

test/PowerShellEditorServices.Test.Host/TestFiles/FindReferences.ps1

@@ -14,3 +14,6 @@ Write-Output ""
 
 . .\VariableDefinition.ps1
 Write-Output $variableInOtherFile
+
+${variable-with-weird-name} = "this variable has special characters"
+Write-Output ${variable-with-weird-name}