Minor cleanups.

substratevm/src/com.oracle.svm.test/src/com/oracle/svm/test/jfr/TestGCHeapSummaryEvent.java

@@ -25,17 +25,18 @@
 
 package com.oracle.svm.test.jfr;
 
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
 import java.util.List;
 
-import jdk.jfr.consumer.RecordedObject;
 import org.junit.Test;
 
 import com.oracle.svm.core.jfr.JfrEvent;
 
 import jdk.jfr.Recording;
 import jdk.jfr.consumer.RecordedEvent;
+import jdk.jfr.consumer.RecordedObject;
 
 public class TestGCHeapSummaryEvent extends JfrRecordingTest {
     @Test
@@ -52,11 +53,13 @@ private static void validateEvents(List<RecordedEvent> events) {
         assertTrue(events.size() > 0);
         for (RecordedEvent event : events) {
             RecordedObject heapSpace = event.getValue("heapSpace");
-            assertTrue(heapSpace.getLong("start") == -1);
-            assertTrue(heapSpace.getLong("committedEnd") == -1);
-            assertTrue(heapSpace.getLong("reservedEnd") == -1);
-            assertTrue(heapSpace.getLong("committedSize") > 0);
-            assertTrue(heapSpace.getLong("reservedSize") >= heapSpace.getLong("committedSize"));
+            assertEquals(-1, heapSpace.getLong("start"));
+            assertEquals(-1, heapSpace.getLong("committedEnd"));
+            assertEquals(-1, heapSpace.getLong("reservedEnd"));
+
+            long committedSize = heapSpace.getLong("committedSize");
+            assertTrue(committedSize > 0);
+            assertTrue(heapSpace.getLong("reservedSize") >= committedSize);
             assertTrue(event.getLong("gcId") >= 0);
             assertTrue(event.getString("when").equals("Before GC") || event.getString("when").equals("After GC"));
             assertTrue(event.getLong("heapUsed") > 0);