[NUnit] Do not clear test results when active config changed.

Fixed bug #31272 - Test results disappear randomly after running a
test.
https://bugzilla.xamarin.com/show_bug.cgi?id=31272

Only clear the results in the Test Results window when a workspace
item is closed or a new test run is started. Previously the Test
Results window would be cleared when the active configuration
changed. The active configuration can be changed manually or if the
SolutionItem's OnExecutionTargetsChanged method is called and the
project does not use Debug as its default target. The Unit Tests
window is still refreshed when the active configuration is changed.

1 files changed, 17 insertions, 7 deletions

diff --git a/main/src/addins/NUnit/Gui/TestResultsPad.cs b/main/src/addins/NUnit/Gui/TestResultsPad.cs
index fc1c178df9..7758886781 100644
--- a/main/src/addins/NUnit/Gui/TestResultsPad.cs
+++ b/main/src/addins/NUnit/Gui/TestResultsPad.cs
@@ -105,6 +105,7 @@ namespace MonoDevelop.NUnit
 		public TestResultsPad ()
 		{
 			testService.TestSuiteChanged += new EventHandler (OnTestSuiteChanged);
+			IdeApp.Workspace.WorkspaceItemClosed += OnWorkspaceItemClosed;
 			
 			panel = new VBox ();
 			
@@ -259,14 +260,28 @@ namespace MonoDevelop.NUnit
 		
 		public void OnTestSuiteChanged (object sender, EventArgs e)
 		{
+			if (rootTest != null) {
+				rootTest = testService.SearchTest (rootTest.FullName);
+				if (rootTest == null)
+					buttonRun.Sensitive = false;
+			}
+		}
+
+		void OnWorkspaceItemClosed (object sender, EventArgs e)
+		{
+			ClearResults ();
+		}
+
+		void ClearResults ()
+		{
 			if (failuresTreeView.IsRealized)
 				failuresTreeView.ScrollToPoint (0, 0);
 
 			results.Clear ();
-			
+
 			error = null;
 			errorMessage = null;
-			
+
 			failuresStore.Clear ();
 			outputView.Buffer.Clear ();
 			outIters.Clear ();
@@ -276,11 +291,6 @@ namespace MonoDevelop.NUnit
 			resultSummary = new UnitTestResult ();
 			resultLabel.Markup = GetResultsMarkup ();
 			UpdateCounters ();
-			if (rootTest != null) {
-				rootTest = testService.SearchTest (rootTest.FullName);
-				if (rootTest == null)
-					buttonRun.Sensitive = false;
-			}
 		}
 		
 		bool Running {