Wait for auto-refresh at ClasspathTests.tearDown()

Fixes: eclipse-jdt#4903

Author: trancexpress

org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/AbstractJavaModelTests.java

@@ -4108,6 +4108,15 @@ public void waitForManualRefresh() {
 		} while (wasInterrupted);
 	}
 
+	public static void waitForAutoRefresh() throws CoreException {
+		try {
+			Job.getJobManager().wakeUp(ResourcesPlugin.FAMILY_AUTO_REFRESH);
+			Job.getJobManager().join(ResourcesPlugin.FAMILY_AUTO_REFRESH, null);
+		} catch (OperationCanceledException | InterruptedException e) {
+			throw new CoreException(Status.error("Waiting on auto-refresh interrupted", e));
+		}
+	}
+
 	public static boolean isTouchJobRunning() {
 		Job[] jobs = Job.getJobManager().find(JavaModelManager.class);
 		for (Job job : jobs) {

org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/ClasspathTests.java

@@ -96,6 +96,7 @@ public void setUpSuite() throws Exception {
 @Override
 protected void tearDown() throws Exception {
 	try {
+		waitForAutoRefresh();
 		waitForAutoBuild();
 	} finally {
 		super.tearDown();