#1672 - ENH: Add ebean.dumpMetricsOnShutdown=true ... for dumping metrics

src/test/java/io/ebeaninternal/server/profile/SortMetricTest.java

@@ -0,0 +1,67 @@
+package io.ebeaninternal.server.profile;
+
+import io.ebean.meta.MetaTimedMetric;
+import io.ebean.meta.MetricType;
+import io.ebean.meta.SortMetric;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import static org.junit.Assert.assertEquals;
+
+public class SortMetricTest {
+
+  private Comparator<MetaTimedMetric> sortMetric = SortMetric.NAME;
+
+  @Test
+  public void compare_list() {
+
+    List<DTimeMetricStats> list = new ArrayList<>();
+    list.add(create("d"));
+    list.add(create("b"));
+    list.add(create("c"));
+    list.add(create(null));
+    list.add(create("a"));
+    list.sort(sortMetric);
+
+    String names = list.stream().map(DTimeMetricStats::getName).collect(Collectors.joining());
+
+    assertEquals("nullabcd", names);
+  }
+
+  @Test
+  public void compare_when_same() {
+
+    assertEquals(0, sortMetric.compare(create("foo"), create("foo")));
+    assertEquals(0, sortMetric.compare(create(null), create(null)));
+  }
+
+  @Test
+  public void compare_when_less() {
+
+    assertEquals(-1, sortMetric.compare(create("a"), create("b")));
+    assertEquals(-1, sortMetric.compare(create("foo"), create("goo")));
+  }
+
+  @Test
+  public void compare_when_more() {
+
+    assertEquals(1, sortMetric.compare(create("b"), create("a")));
+    assertEquals(1, sortMetric.compare(create("goo"), create("foo")));
+  }
+
+  @Test
+  public void compare_when_nulls() {
+
+    assertEquals(0, sortMetric.compare(create(null), create(null)));
+    assertEquals(1, sortMetric.compare(create("foo"), create(null)));
+    assertEquals(-1, sortMetric.compare(create(null), create("foo")));
+  }
+
+  private DTimeMetricStats create(String name) {
+    return new DTimeMetricStats(MetricType.L2, name, 0, 0, 0, 0, 0);
+  }
+}