[UITest] Change Query to WaitForElement on 45125 and change GetResult to await for Performance Gallery testing (#7057)

* change query to waitforelement and use async over GetResult

* - ConfigureAwait(false)

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla45125.cs

@@ -256,8 +256,8 @@ namespace Xamarin.Forms.Controls.Issues
 			RunningApp.WaitForElement (q => q.Marked (DisappearingLabelId));
 
 			RunningApp.Screenshot ("There should be appearing and disappearing events for the Groups and Items.");
-			var appearing = int.Parse(RunningApp.Query(q => q.Marked(AppearingLabelId))[0].Text);
-			var disappearing = int.Parse(RunningApp.Query(q=> q.Marked(DisappearingLabelId))[0].Text);
+			var appearing = int.Parse(RunningApp.WaitForElement(AppearingLabelId)[0].ReadText());
+			var disappearing = int.Parse(RunningApp.WaitForElement(DisappearingLabelId)[0].ReadText());
 
 			Assert.IsTrue(appearing > 0, $"Test {_TestNumber}: No appearing events for groups found.");
 			Assert.IsTrue(disappearing > 0, $"Test {_TestNumber}: No disappearing events for groups found.");

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/PerformanceGallery/PerformanceDataManager.cs

@@ -38,7 +38,7 @@ namespace Xamarin.Forms.Controls.Issues
 
 		public static async Task<Dictionary<string, double>> GetScenarioResults(string deviceId)
 		{
-			var response = await _client.GetAsync(GetScenarioResultsRoute + deviceId);
+			var response = await _client.GetAsync(GetScenarioResultsRoute + deviceId).ConfigureAwait(false);
 
 			if (!response.IsSuccessStatusCode)
 				return new Dictionary<string, double>();
@@ -63,12 +63,12 @@ namespace Xamarin.Forms.Controls.Issues
 			};
 			var json = JsonConvert.SerializeObject(data);
 			var content = new StringContent(json, Encoding.UTF8, "application/json");
-			var response = await _client.PostAsync(PostScenarioResultRoute + scenarioName, content);
-			var responseContent = await response.Content.ReadAsStringAsync();
+			var response = await _client.PostAsync(PostScenarioResultRoute + scenarioName, content).ConfigureAwait(false);
+			var responseContent = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
 
 			var scenarioResult = JsonConvert.DeserializeObject<ScenarioResult>(responseContent);
 
-			await PostScenarioResultDetails(scenarioResult.Id, details);
+			await PostScenarioResultDetails(scenarioResult.Id, details).ConfigureAwait(false);
 		}
 
 		static async Task PostScenarioResultDetails(Guid scenarioResultId, Dictionary<string, PerformanceProvider.Statistic> details)
@@ -84,7 +84,7 @@ namespace Xamarin.Forms.Controls.Issues
 					Name = detail.Key
 				};
 				var content = new StringContent(JsonConvert.SerializeObject(data), Encoding.UTF8, "application/json");
-				await _client.PostAsync(PostScenarioResultDetailsRoute + scenarioResultId, content);
+				await _client.PostAsync(PostScenarioResultDetailsRoute + scenarioResultId, content).ConfigureAwait(false);
 			}
 		}
 

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/PerformanceGallery/PerformanceGallery.cs

@@ -41,7 +41,7 @@ namespace Xamarin.Forms.Controls.Issues
 		PerformanceTracker _PerformanceTracker = new PerformanceTracker();
 		List<PerformanceScenario> _TestCases = new List<PerformanceScenario>();
 		int _TestNumber = 0;
-
+		Button nextButton;
 		PerformanceViewModel ViewModel => BindingContext as PerformanceViewModel;
 
 		protected override void Init()
@@ -65,7 +65,7 @@ namespace Xamarin.Forms.Controls.Issues
 
 			_TestCases.AddRange(InflatePerformanceScenarios());
 
-			var nextButton = new Button { Text = Pending, IsEnabled = false, AutomationId = NextButtonId };
+			nextButton = new Button { Text = Pending, IsEnabled = false, AutomationId = NextButtonId };
 			nextButton.Clicked += NextButton_Clicked;
 
 			ViewModel.TestRunReferenceId = Guid.NewGuid();
@@ -82,11 +82,30 @@ namespace Xamarin.Forms.Controls.Issues
 			};
 
 			Content = new StackLayout { Children = { testRunRef, nextButton, _PerformanceTracker } };
+			GetBenchmarkResults();
+		}
 
-			ViewModel.BenchmarkResults = Task.Run(() => PerformanceDataManager.GetScenarioResults(_DeviceIdentifier)).GetAwaiter().GetResult();
+		async void GetBenchmarkResults(int tryCount = 0)
+		{
+			bool success = false;
+			try
+			{
+				ViewModel.BenchmarkResults = await PerformanceDataManager.GetScenarioResults(_DeviceIdentifier);
+				success = true;
+			}
+			catch(Exception exc)
+			{
+				if (tryCount < 3)
+					GetBenchmarkResults(++tryCount);
+				else
+					nextButton.Text = exc.ToString();
+			}
 
-			nextButton.IsEnabled = true;
-			nextButton.Text = Next;
+			if (success)
+			{
+				nextButton.IsEnabled = true;
+				nextButton.Text = Next;
+			}
 		}
 
 		private static string GetBuildNumber()