Add more tests to external code repo

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=131406104

javatests/google/registry/monitoring/metrics/CounterTest.java

@@ -0,0 +1,187 @@
+// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package google.registry.monitoring.metrics;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.junit.Assert.fail;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import org.joda.time.Instant;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.runners.MockitoJUnitRunner;
+
+/** Unit tests for {@link Counter}. */
+@RunWith(MockitoJUnitRunner.class)
+public class CounterTest {
+
+  @Test
+  public void testGetCardinality_reflectsCurrentCardinality() {
+    Counter counter =
+        new Counter(
+            "/metric",
+            "description",
+            "vdn",
+            ImmutableSet.of(LabelDescriptor.create("label1", "bar")));
+    assertThat(counter.getCardinality()).isEqualTo(0);
+
+    counter.increment("foo");
+    assertThat(counter.getCardinality()).isEqualTo(1);
+    counter.increment("bar");
+    assertThat(counter.getCardinality()).isEqualTo(2);
+    counter.increment("foo");
+    assertThat(counter.getCardinality()).isEqualTo(2);
+  }
+
+  @Test
+  public void testIncrementBy_wrongLabelValueCount_throwsException() {
+    Counter counter =
+        new Counter(
+            "/metric",
+            "description",
+            "vdn",
+            ImmutableSet.of(
+                LabelDescriptor.create("label1", "bar"), LabelDescriptor.create("label2", "bar")));
+
+    try {
+      counter.increment("blah");
+      fail("expected IllegalArgumentException");
+    } catch (IllegalArgumentException expected) {
+    }
+  }
+
+  @Test
+  public void testIncrement_incrementsValues() {
+    Counter counter =
+        new Counter(
+            "/metric",
+            "description",
+            "vdn",
+            ImmutableSet.of(LabelDescriptor.create("label1", "bar")));
+
+    assertThat(counter.getTimestampedValues()).isEmpty();
+
+    // use package-private incrementBy once to set the start timestamp predictably.
+    counter.incrementBy(1, new Instant(1337), ImmutableList.of("test_value1"));
+    assertThat(counter.getTimestampedValues(new Instant(1337)))
+        .containsExactly(
+            MetricPoint.create(counter, ImmutableList.of("test_value1"), new Instant(1337), 1L));
+
+    counter.increment("test_value1");
+    assertThat(counter.getTimestampedValues(new Instant(1337)))
+        .containsExactly(
+            MetricPoint.create(counter, ImmutableList.of("test_value1"), new Instant(1337), 2L));
+  }
+
+  @Test
+  public void testIncrementBy_incrementsValues() {
+    Counter counter =
+        new Counter(
+            "/metric",
+            "description",
+            "vdn",
+            ImmutableSet.of(LabelDescriptor.create("label1", "bar")));
+
+    assertThat(counter.getTimestampedValues()).isEmpty();
+
+    counter.incrementBy(1, new Instant(1337), ImmutableList.of("test_value1"));
+    assertThat(counter.getTimestampedValues(new Instant(1337)))
+        .containsExactly(
+            MetricPoint.create(counter, ImmutableList.of("test_value1"), new Instant(1337), 1L));
+
+    counter.set(-10L, new Instant(1337), ImmutableList.of("test_value2"));
+    counter.incrementBy(5, new Instant(1337), ImmutableList.of("test_value2"));
+    assertThat(counter.getTimestampedValues(new Instant(1337)))
+        .containsExactly(
+            MetricPoint.create(counter, ImmutableList.of("test_value1"), new Instant(1337), 1L),
+            MetricPoint.create(counter, ImmutableList.of("test_value2"), new Instant(1337), -5L));
+  }
+
+  @Test
+  public void testIncrementBy_negativeOffset_throwsException() {
+    Counter counter =
+        new Counter(
+            "/metric",
+            "description",
+            "vdn",
+            ImmutableSet.of(LabelDescriptor.create("label1", "bar")));
+
+    try {
+      counter.incrementBy(-1L, "foo");
+      fail("Test should not allow non-negative offsets");
+    } catch (IllegalArgumentException expected) {
+      assertThat(expected).hasMessage("The offset provided must be non-negative");
+    }
+  }
+
+  @Test
+  public void testResetAll_resetsAllValuesAndStartTimestamps() {
+    Counter counter =
+        new Counter(
+            "/metric",
+            "description",
+            "vdn",
+            ImmutableSet.of(LabelDescriptor.create("label1", "bar")));
+
+    counter.incrementBy(3, new Instant(1337), ImmutableList.of("foo"));
+    counter.incrementBy(5, new Instant(1338), ImmutableList.of("moo"));
+
+    assertThat(counter.getTimestampedValues(new Instant(1400)))
+        .containsExactly(
+            MetricPoint.create(
+                counter, ImmutableList.of("foo"), new Instant(1337), new Instant(1400), 3L),
+            MetricPoint.create(
+                counter, ImmutableList.of("moo"), new Instant(1338), new Instant(1400), 5L));
+
+    counter.reset(new Instant(1339));
+
+    assertThat(counter.getTimestampedValues(new Instant(1400)))
+        .containsExactly(
+            MetricPoint.create(
+                counter, ImmutableList.of("foo"), new Instant(1339), new Instant(1400), 0L),
+            MetricPoint.create(
+                counter, ImmutableList.of("moo"), new Instant(1339), new Instant(1400), 0L));
+  }
+
+  @Test
+  public void testReset_resetsValuesAndStartTimestamps() {
+    Counter counter =
+        new Counter(
+            "/metric",
+            "description",
+            "vdn",
+            ImmutableSet.of(LabelDescriptor.create("label1", "bar")));
+
+    counter.incrementBy(3, new Instant(1337), ImmutableList.of("foo"));
+    counter.incrementBy(5, new Instant(1338), ImmutableList.of("moo"));
+
+    assertThat(counter.getTimestampedValues(new Instant(1400)))
+        .containsExactly(
+            MetricPoint.create(
+                counter, ImmutableList.of("foo"), new Instant(1337), new Instant(1400), 3L),
+            MetricPoint.create(
+                counter, ImmutableList.of("moo"), new Instant(1338), new Instant(1400), 5L));
+
+    counter.reset(new Instant(1339), ImmutableList.of("foo"));
+
+    assertThat(counter.getTimestampedValues(new Instant(1400)))
+        .containsExactly(
+            MetricPoint.create(
+                counter, ImmutableList.of("foo"), new Instant(1339), new Instant(1400), 0L),
+            MetricPoint.create(
+                counter, ImmutableList.of("moo"), new Instant(1338), new Instant(1400), 5L));
+  }
+}