Fix Random Failing UIEditWorkingSetWizardAuto.testEditPage eclipse-pl…

…atform#275

In my experiments, the test failed in roughly 2% of runs.

The test didn't close all processes and editors before deleting the
files it contained.
This PR Makes the Job-Manager join all jobs before finally deleting the
project-root.

eclipse-platform#275

tests/org.eclipse.ui.tests/Eclipse UI Tests/org/eclipse/ui/tests/dialogs/UIWorkingSetWizardsAuto.java

@@ -21,6 +21,8 @@
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.OperationCanceledException;
+import org.eclipse.core.runtime.jobs.Job;
 import org.eclipse.jface.wizard.IWizard;
 import org.eclipse.jface.wizard.IWizardPage;
 import org.eclipse.jface.wizard.WizardDialog;
@@ -135,10 +137,18 @@ private void removeAllWorkingSets() {
 
 	private void cleanupWorkspace() {
 		try {
+			PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().closeAllEditors(false);
+			Job.getJobManager().join(ResourcesPlugin.FAMILY_AUTO_BUILD, null);
 			ResourcesPlugin.getWorkspace().getRoot().delete(true, null);
 		} catch (CoreException e) {
 			TestPlugin.getDefault().getLog().log(e.getStatus());
 			throw createAssertionError(e);
+		} catch (OperationCanceledException e) {
+			e.printStackTrace();
+			throw new AssertionError(e.getMessage(), e);
+		} catch (InterruptedException e) {
+			e.printStackTrace();
+			throw new AssertionError(e.getMessage(), e);
 		} finally {
 			project1 = null;
 			project2 = null;