--- /dev/null	2018-06-17 23:18:20.806999507 +0800
+++ new/test/jdk/jfr/event/gc/collection/GCGarbageCollectionUtil.java	2019-01-29 11:02:38.670336773 +0800
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2013, 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.jfr.event.gc.collection;
+
+import static jdk.testlibrary.Asserts.assertGreaterThan;
+import static jdk.testlibrary.Asserts.assertTrue;
+
+import java.io.File;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import jdk.jfr.consumer.RecordedEvent;
+import jdk.jfr.consumer.RecordingFile;
+import jdk.testlibrary.jfr.AppExecutorHelper;
+import jdk.testlibrary.jfr.Events;
+import jdk.testlibrary.OutputAnalyzer;
+
+
+/**
+ * Class to verify GarbageCollection event.
+ * It starts the application provoking GCGarbageCollection with enabled JFR,
+ * collects events and verify the 'name' and 'cause' fields to be expected.
+ * It's supposed to be invoked from tests.
+ */
+public class GCGarbageCollectionUtil {
+    private final static String EVENT_SETTINGS_FILE =
+            System.getProperty("test.src", ".") + File.separator + "gc-testsettings.jfc";
+
+    /**
+     * Verifies the 'name' and 'cause' fields of received events to be expected.
+     * @param testID - a string to identify test
+     * @param testFlags - VM flags including GC to start the app
+     * @param gcNames - expected values for the 'name' field
+     * @param gcCauses - expected values for the 'cause' field
+     * @throws Exception in case of any failure
+     */
+    public static void test(String testID, String[] testFlags,
+            String[] gcNames, String... gcCauses) throws Exception {
+
+        String jfrFile = testID + ".jfr";
+
+        List<String> summaryFlags = new ArrayList<>();
+        Collections.addAll(summaryFlags, testFlags);
+        summaryFlags.add("-Xmx100m");
+        summaryFlags.add("-XX:+UnlockExperimentalVMOptions");
+        summaryFlags.add("-XX:-UseFastUnorderedTimeStamps");
+        summaryFlags.add("-verbose:gc");
+
+
+        String args[] = {};
+        OutputAnalyzer analyzer = AppExecutorHelper.executeAndRecord(EVENT_SETTINGS_FILE, jfrFile,
+                (String[])summaryFlags.toArray(new String[0]), AppGCProvoker.class.getName(), args);
+        analyzer.shouldHaveExitValue(0);
+
+        Set<String> gcValidNames = new HashSet<>();
+        for (String n: gcNames) {
+            gcValidNames.add(n);
+        }
+        Set<String> gcValidCauses = new HashSet<>();
+        for (String n: gcCauses) {
+            gcValidCauses.add(n);
+        }
+
+        int total = 0;
+        for (RecordedEvent event : RecordingFile.readAllEvents(Paths.get(jfrFile))) {
+            total++;
+            System.out.println("Event: " + event);
+
+            final String name = Events.assertField(event, "name").notEmpty().getValue();
+            assertTrue(gcValidNames.contains(name), "GC name '" + name + "' not in the valid list" + gcValidNames);
+
+            final String cause = Events.assertField(event, "cause").notEmpty().getValue();
+            assertTrue(gcValidCauses.contains(cause), "GC cause '" + cause + "' not in the valid causes" + gcValidCauses);
+        }
+        assertGreaterThan(total, 0, "Expected at least one event");
+    }
+}