Attempt fix Angular template flaky test (#17279)

* Attempt fix Angular template flaky test

* Increase timeout

src/ProjectTemplates/test/Helpers/ProcessEx.cs

@@ -164,7 +164,7 @@ namespace Templates.Test.Helpers
         {
             if (!_process.HasExited)
             {
-                throw new InvalidOperationException("Process has not finished running.");
+                throw new InvalidOperationException($"Process {_process.ProcessName} with pid: {_process.Id} has not finished running.");
             }
 
             return $"Process exited with code {_process.ExitCode}\nStdErr: {Error}\nStdOut: {Output}";
@@ -174,12 +174,16 @@ namespace Templates.Test.Helpers
         {
             if(!timeSpan.HasValue)
             {
-                timeSpan = TimeSpan.FromSeconds(480);
+                timeSpan = TimeSpan.FromSeconds(600);
             }
 
-            Exited.Wait(timeSpan.Value);
-
-            if (assertSuccess && _process.ExitCode != 0)
+            var exited = Exited.Wait(timeSpan.Value);
+            if (!exited)
+            {
+                _output.WriteLine($"The process didn't exit within the allotted time ({timeSpan.Value.TotalSeconds} seconds).");
+                _process.Dispose();
+            }
+            else if (assertSuccess && _process.ExitCode != 0)
             {
                 throw new Exception($"Process exited with code {_process.ExitCode}\nStdErr: {Error}\nStdOut: {Output}");
             }

src/ProjectTemplates/test/Helpers/Project.cs

@@ -242,7 +242,7 @@ namespace Templates.Test.Helpers
             do
             {
                 restoreResult = await RestoreAsync(output, workingDirectory);
-                if (restoreResult.ExitCode == 0)
+                if (restoreResult.HasExited && restoreResult.ExitCode == 0)
                 {
                     return restoreResult;
                 }

src/ProjectTemplates/test/SpaTemplateTest/SpaTemplateTestBase.cs

@@ -212,7 +212,7 @@ namespace Templates.Test.SpaTemplateTest
                 catch (HttpRequestException ex) when (ex.Message.StartsWith("The SSL connection could not be established"))
                 {
                 }
-                await Task.Delay(TimeSpan.FromSeconds(5 * attempt));
+                await Task.Delay(TimeSpan.FromSeconds(10 * attempt));
             } while (attempt < maxAttempts);
         }
 
@@ -306,10 +306,12 @@ namespace Templates.Test.SpaTemplateTest
                 var entries = logs.GetLog(logKind);
                 var badEntries = entries.Where(e => new LogLevel[] { LogLevel.Warning, LogLevel.Severe }.Contains(e.Level));
 
+                // Based on https://github.com/webpack/webpack-dev-server/issues/2134
                 badEntries = badEntries.Where(e =>
                     !e.Message.Contains("failed: WebSocket is closed before the connection is established.")
                     && !e.Message.Contains("[WDS] Disconnected!")
-                    && !e.Message.Contains("Timed out connecting to Chrome, retrying"));
+                    && !e.Message.Contains("Timed out connecting to Chrome, retrying")
+                    && !(e.Message.Contains("jsonp?c=") && e.Message.Contains("Uncaught TypeError:") && e.Message.Contains("is not a function")));
 
                 Assert.True(badEntries.Count() == 0, "There were Warnings or Errors from the browser." + Environment.NewLine + string.Join(Environment.NewLine, badEntries));
             }