Baseline tests should check for all possible extensions of not expected files (#62752)

Author: ilonatommy

src/ProjectTemplates/test/Templates.Tests/BaselineTest.cs

@@ -88,15 +88,7 @@ public async Task Template_Produces_The_Right_Set_Of_FilesAsync(string arguments
         foreach (var file in filesInFolder)
         {
             var relativePath = file.Replace(Project.TemplateOutputDir, "").Replace("\\", "/").Trim('/');
-            if (relativePath.EndsWith(".csproj", StringComparison.Ordinal) ||
-                relativePath.EndsWith(".fsproj", StringComparison.Ordinal) ||
-                relativePath.EndsWith(".props", StringComparison.Ordinal) ||
-                relativePath.EndsWith(".sln", StringComparison.Ordinal) ||
-                relativePath.EndsWith(".targets", StringComparison.Ordinal) ||
-                relativePath.StartsWith("bin/", StringComparison.Ordinal) ||
-                relativePath.StartsWith("obj/", StringComparison.Ordinal) ||
-                relativePath.Contains("/bin/", StringComparison.Ordinal) ||
-                relativePath.Contains("/obj/", StringComparison.Ordinal))
+            if (IsIgnoredPath(relativePath))
             {
                 continue;
             }
@@ -118,6 +110,12 @@ public async Task Template_Produces_The_Right_Set_Of_FilesAsync(string arguments
         }
     }
 
+    private static bool IsIgnoredPath(string relativePath) =>
+        relativePath.StartsWith("bin/", StringComparison.Ordinal) ||
+        relativePath.StartsWith("obj/", StringComparison.Ordinal) ||
+        relativePath.Contains("/bin/", StringComparison.Ordinal) ||
+        relativePath.Contains("/obj/", StringComparison.Ordinal);
+
     private void AssertFileExists(string basePath, string path, bool shouldExist)
     {
         var fullPath = Path.Combine(basePath, path);