Add not null assertion to symbols service test (and clean up)

src/PowerShellEditorServices/Services/Symbols/SymbolsService.cs

@@ -427,13 +427,10 @@ public async Task<SymbolReference> GetDefinitionOfSymbolAsync(
             SymbolReference foundDefinition = null;
             foreach (ScriptFile scriptFile in referencedFiles)
             {
-                foundDefinition =
-                    AstOperations.FindDefinitionOfSymbol(
-                        scriptFile.ScriptAst,
-                        foundSymbol);
+                foundDefinition = AstOperations.FindDefinitionOfSymbol(scriptFile.ScriptAst, foundSymbol);
 
                 filesSearched.Add(scriptFile.FilePath);
-                if (foundDefinition != null)
+                if (foundDefinition is not null)
                 {
                     foundDefinition.FilePath = scriptFile.FilePath;
                     break;
@@ -453,7 +450,7 @@ public async Task<SymbolReference> GetDefinitionOfSymbolAsync(
 
             // if the definition the not found in referenced files
             // look for it in all the files in the workspace
-            if (foundDefinition == null)
+            if (foundDefinition is null)
             {
                 // Get a list of all powershell files in the workspace path
                 foreach (string file in _workspaceService.EnumeratePSFiles())
@@ -469,7 +466,7 @@ public async Task<SymbolReference> GetDefinitionOfSymbolAsync(
                             foundSymbol);
 
                     filesSearched.Add(file);
-                    if (foundDefinition != null)
+                    if (foundDefinition is not null)
                     {
                         foundDefinition.FilePath = file;
                         break;
@@ -480,7 +477,7 @@ public async Task<SymbolReference> GetDefinitionOfSymbolAsync(
             // if the definition is not found in a file in the workspace
             // look for it in the builtin commands but only if the symbol
             // we are looking at is possibly a Function.
-            if (foundDefinition == null
+            if (foundDefinition is null
                 && (foundSymbol.SymbolType == SymbolType.Function
                     || foundSymbol.SymbolType == SymbolType.Unknown))
             {

src/PowerShellEditorServices/Services/Symbols/Vistors/AstOperations.cs

@@ -215,11 +215,8 @@ public static SymbolReference FindDefinitionOfSymbol(
             Ast scriptAst,
             SymbolReference symbolReference)
         {
-            FindDeclarationVisitor declarationVisitor =
-                new(
-                    symbolReference);
+            FindDeclarationVisitor declarationVisitor = new(symbolReference);
             scriptAst.Visit(declarationVisitor);
-
             return declarationVisitor.FoundDeclaration;
         }
 

test/PowerShellEditorServices.Test/Language/SymbolsServiceTests.cs

@@ -133,7 +133,7 @@ public async Task FindsFunctionDefinition()
         [Fact]
         public async Task FindsFunctionDefinitionForAlias()
         {
-            // TODO: Eventually we should get the alises through the AST instead of relying on them
+            // TODO: Eventually we should get the aliases through the AST instead of relying on them
             // being defined in the runspace.
             await psesHost.ExecutePSCommandAsync(
                 new PSCommand().AddScript("Set-Alias -Name My-Alias -Value My-Function"),
@@ -184,6 +184,7 @@ public async Task FindsFunctionDefinitionInDotSourceReference()
         public async Task FindsDotSourcedFile()
         {
             SymbolReference definitionResult = await GetDefinition(FindsDotSourcedFileData.SourceDetails).ConfigureAwait(true);
+            Assert.NotNull(definitionResult);
             Assert.True(
                 definitionResult.FilePath.EndsWith(Path.Combine("References", "ReferenceFileE.ps1")),
                 "Unexpected reference file: " + definitionResult.FilePath);