1 files changed, 356 insertions, 0 deletions
diff --git a/impl_core/src/test/java/io/opencensus/implcore/metrics/MetricRegistryImplTest.java b/impl_core/src/test/java/io/opencensus/implcore/metrics/MetricRegistryImplTest.java
new file mode 100644
index 00000000..68bfda31
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+++ b/impl_core/src/test/java/io/opencensus/implcore/metrics/MetricRegistryImplTest.java
@@ -0,0 +1,356 @@
+/*
+ * Copyright 2018, OpenCensus Authors
+ *
+ * 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 io.opencensus.implcore.metrics;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import io.opencensus.common.Timestamp;
+import io.opencensus.common.ToDoubleFunction;
+import io.opencensus.common.ToLongFunction;
+import io.opencensus.metrics.DerivedDoubleGauge;
+import io.opencensus.metrics.DerivedLongGauge;
+import io.opencensus.metrics.DoubleGauge;
+import io.opencensus.metrics.DoubleGauge.DoublePoint;
+import io.opencensus.metrics.LabelKey;
+import io.opencensus.metrics.LabelValue;
+import io.opencensus.metrics.LongGauge;
+import io.opencensus.metrics.LongGauge.LongPoint;
+import io.opencensus.metrics.export.Metric;
+import io.opencensus.metrics.export.MetricDescriptor;
+import io.opencensus.metrics.export.MetricDescriptor.Type;
+import io.opencensus.metrics.export.Point;
+import io.opencensus.metrics.export.TimeSeries;
+import io.opencensus.metrics.export.Value;
+import io.opencensus.testing.common.TestClock;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit tests for {@link MetricRegistryImpl}. */
+@RunWith(JUnit4.class)
+public class MetricRegistryImplTest {
+  @Rule public ExpectedException thrown = ExpectedException.none();
+
+  private static final String NAME = "name";
+  private static final String NAME_2 = "name2";
+  private static final String NAME_3 = "name3";
+  private static final String NAME_4 = "name4";
+  private static final String DESCRIPTION = "description";
+  private static final String UNIT = "1";
+  private static final List<LabelKey> LABEL_KEY =
+      Collections.singletonList(LabelKey.create("key", "key description"));
+  private static final List<LabelValue> LABEL_VALUES =
+      Collections.singletonList(LabelValue.create("value"));
+
+  private static final Timestamp TEST_TIME = Timestamp.create(1234, 123);
+  private final TestClock testClock = TestClock.create(TEST_TIME);
+  private final MetricRegistryImpl metricRegistry = new MetricRegistryImpl(testClock);
+
+  private static final MetricDescriptor LONG_METRIC_DESCRIPTOR =
+      MetricDescriptor.create(NAME, DESCRIPTION, UNIT, Type.GAUGE_INT64, LABEL_KEY);
+  private static final MetricDescriptor DOUBLE_METRIC_DESCRIPTOR =
+      MetricDescriptor.create(NAME_2, DESCRIPTION, UNIT, Type.GAUGE_DOUBLE, LABEL_KEY);
+  private static final MetricDescriptor DERIVED_LONG_METRIC_DESCRIPTOR =
+      MetricDescriptor.create(NAME_3, DESCRIPTION, UNIT, Type.GAUGE_INT64, LABEL_KEY);
+  private static final MetricDescriptor DERIVED_DOUBLE_METRIC_DESCRIPTOR =
+      MetricDescriptor.create(NAME_4, DESCRIPTION, UNIT, Type.GAUGE_DOUBLE, LABEL_KEY);
+
+  private static final ToLongFunction<Object> longFunction =
+      new ToLongFunction<Object>() {
+        @Override
+        public long applyAsLong(Object value) {
+          return 5;
+        }
+      };
+  private static final ToDoubleFunction<Object> doubleFunction =
+      new ToDoubleFunction<Object>() {
+        @Override
+        public double applyAsDouble(Object value) {
+          return 5.0;
+        }
+      };
+
+  @Test
+  public void addLongGauge_NullName() {
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("name");
+    metricRegistry.addLongGauge(null, DESCRIPTION, UNIT, LABEL_KEY);
+  }
+
+  @Test
+  public void addLongGauge_NullDescription() {
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("description");
+    metricRegistry.addLongGauge(NAME, null, UNIT, LABEL_KEY);
+  }
+
+  @Test
+  public void addLongGauge_NullUnit() {
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("unit");
+    metricRegistry.addLongGauge(NAME, DESCRIPTION, null, LABEL_KEY);
+  }
+
+  @Test
+  public void addLongGauge_NullLabels() {
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("labelKeys");
+    metricRegistry.addLongGauge(NAME, DESCRIPTION, UNIT, null);
+  }
+
+  @Test
+  public void addLongGauge_WithNullElement() {
+    List<LabelKey> labelKeys = Collections.singletonList(null);
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("labelKey element should not be null.");
+    metricRegistry.addLongGauge(NAME, DESCRIPTION, UNIT, labelKeys);
+  }
+
+  @Test
+  public void addDoubleGauge_NullName() {
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("name");
+    metricRegistry.addDoubleGauge(null, DESCRIPTION, UNIT, LABEL_KEY);
+  }
+
+  @Test
+  public void addDoubleGauge_NullDescription() {
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("description");
+    metricRegistry.addDoubleGauge(NAME_2, null, UNIT, LABEL_KEY);
+  }
+
+  @Test
+  public void addDoubleGauge_NullUnit() {
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("unit");
+    metricRegistry.addDoubleGauge(NAME_2, DESCRIPTION, null, LABEL_KEY);
+  }
+
+  @Test
+  public void addDoubleGauge_NullLabels() {
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("labelKeys");
+    metricRegistry.addDoubleGauge(NAME_2, DESCRIPTION, UNIT, null);
+  }
+
+  @Test
+  public void addDoubleGauge_WithNullElement() {
+    List<LabelKey> labelKeys = Collections.singletonList(null);
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("labelKey element should not be null.");
+    metricRegistry.addDoubleGauge(NAME_2, DESCRIPTION, UNIT, labelKeys);
+  }
+
+  @Test
+  public void addDerivedLongGauge_NullName() {
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("name");
+    metricRegistry.addDerivedLongGauge(null, DESCRIPTION, UNIT, LABEL_KEY);
+  }
+
+  @Test
+  public void addDerivedLongGauge_NullDescription() {
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("description");
+    metricRegistry.addDerivedLongGauge(NAME_3, null, UNIT, LABEL_KEY);
+  }
+
+  @Test
+  public void addDerivedLongGauge_NullUnit() {
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("unit");
+    metricRegistry.addDerivedLongGauge(NAME_3, DESCRIPTION, null, LABEL_KEY);
+  }
+
+  @Test
+  public void addDerivedLongGauge_NullLabels() {
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("labelKeys");
+    metricRegistry.addDerivedLongGauge(NAME_3, DESCRIPTION, UNIT, null);
+  }
+
+  @Test
+  public void addDerivedLongGauge_WithNullElement() {
+    List<LabelKey> labelKeys = Collections.singletonList(null);
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("labelKey element should not be null.");
+    metricRegistry.addDerivedLongGauge(NAME_3, DESCRIPTION, UNIT, labelKeys);
+  }
+
+  @Test
+  public void addDerivedDoubleGauge_NullName() {
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("name");
+    metricRegistry.addDerivedDoubleGauge(null, DESCRIPTION, UNIT, LABEL_KEY);
+  }
+
+  @Test
+  public void addDerivedDoubleGauge_NullDescription() {
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("description");
+    metricRegistry.addDerivedDoubleGauge(NAME_4, null, UNIT, LABEL_KEY);
+  }
+
+  @Test
+  public void addDerivedDoubleGauge_NullUnit() {
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("unit");
+    metricRegistry.addDerivedDoubleGauge(NAME_4, DESCRIPTION, null, LABEL_KEY);
+  }
+
+  @Test
+  public void addDerivedDoubleGauge_NullLabels() {
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("labelKeys");
+    metricRegistry.addDerivedDoubleGauge(NAME_4, DESCRIPTION, UNIT, null);
+  }
+
+  @Test
+  public void addDerivedDoubleGauge_WithNullElement() {
+    List<LabelKey> labelKeys = Collections.singletonList(null);
+    thrown.expect(NullPointerException.class);
+    thrown.expectMessage("labelKey element should not be null.");
+    metricRegistry.addDerivedDoubleGauge(NAME_4, DESCRIPTION, UNIT, labelKeys);
+  }
+
+  @Test
+  public void addLongGauge_GetMetrics() {
+    LongGauge longGauge = metricRegistry.addLongGauge(NAME, DESCRIPTION, UNIT, LABEL_KEY);
+    longGauge.getOrCreateTimeSeries(LABEL_VALUES);
+
+    Collection<Metric> metricCollections = metricRegistry.getMetricProducer().getMetrics();
+    assertThat(metricCollections.size()).isEqualTo(1);
+    assertThat(metricCollections)
+        .containsExactly(
+            Metric.createWithOneTimeSeries(
+                LONG_METRIC_DESCRIPTOR,
+                TimeSeries.createWithOnePoint(
+                    LABEL_VALUES, Point.create(Value.longValue(0), TEST_TIME), null)));
+  }
+
+  @Test
+  public void addDoubleGauge_GetMetrics() {
+    DoubleGauge doubleGauge = metricRegistry.addDoubleGauge(NAME_2, DESCRIPTION, UNIT, LABEL_KEY);
+    doubleGauge.getOrCreateTimeSeries(LABEL_VALUES);
+    Collection<Metric> metricCollections = metricRegistry.getMetricProducer().getMetrics();
+    assertThat(metricCollections.size()).isEqualTo(1);
+    assertThat(metricCollections)
+        .containsExactly(
+            Metric.createWithOneTimeSeries(
+                DOUBLE_METRIC_DESCRIPTOR,
+                TimeSeries.createWithOnePoint(
+                    LABEL_VALUES, Point.create(Value.doubleValue(0.0), TEST_TIME), null)));
+  }
+
+  @Test
+  public void addDerivedLongGauge_GetMetrics() {
+    DerivedLongGauge derivedLongGauge =
+        metricRegistry.addDerivedLongGauge(NAME_3, DESCRIPTION, UNIT, LABEL_KEY);
+    derivedLongGauge.createTimeSeries(LABEL_VALUES, null, longFunction);
+    Collection<Metric> metricCollections = metricRegistry.getMetricProducer().getMetrics();
+    assertThat(metricCollections.size()).isEqualTo(1);
+    assertThat(metricCollections)
+        .containsExactly(
+            Metric.createWithOneTimeSeries(
+                DERIVED_LONG_METRIC_DESCRIPTOR,
+                TimeSeries.createWithOnePoint(
+                    LABEL_VALUES, Point.create(Value.longValue(5), TEST_TIME), null)));
+  }
+
+  @Test
+  public void addDerivedDoubleGauge_GetMetrics() {
+    DerivedDoubleGauge derivedDoubleGauge =
+        metricRegistry.addDerivedDoubleGauge(NAME_4, DESCRIPTION, UNIT, LABEL_KEY);
+    derivedDoubleGauge.createTimeSeries(LABEL_VALUES, null, doubleFunction);
+    Collection<Metric> metricCollections = metricRegistry.getMetricProducer().getMetrics();
+    assertThat(metricCollections.size()).isEqualTo(1);
+    assertThat(metricCollections)
+        .containsExactly(
+            Metric.createWithOneTimeSeries(
+                DERIVED_DOUBLE_METRIC_DESCRIPTOR,
+                TimeSeries.createWithOnePoint(
+                    LABEL_VALUES, Point.create(Value.doubleValue(5.0), TEST_TIME), null)));
+  }
+
+  @Test
+  public void empty_GetMetrics() {
+    assertThat(metricRegistry.getMetricProducer().getMetrics()).isEmpty();
+  }
+
+  @Test
+  public void checkInstanceOf() {
+    assertThat(metricRegistry.addLongGauge(NAME, DESCRIPTION, UNIT, LABEL_KEY))
+        .isInstanceOf(LongGaugeImpl.class);
+    assertThat(metricRegistry.addDoubleGauge(NAME_2, DESCRIPTION, UNIT, LABEL_KEY))
+        .isInstanceOf(DoubleGaugeImpl.class);
+    assertThat(metricRegistry.addDerivedLongGauge(NAME_3, DESCRIPTION, UNIT, LABEL_KEY))
+        .isInstanceOf(DerivedLongGaugeImpl.class);
+    assertThat(metricRegistry.addDerivedDoubleGauge(NAME_4, DESCRIPTION, UNIT, LABEL_KEY))
+        .isInstanceOf(DerivedDoubleGaugeImpl.class);
+  }
+
+  @Test
+  public void getMetrics() {
+    LongGauge longGauge = metricRegistry.addLongGauge(NAME, DESCRIPTION, UNIT, LABEL_KEY);
+    LongPoint longPoint = longGauge.getOrCreateTimeSeries(LABEL_VALUES);
+    longPoint.set(200);
+    DoubleGauge doubleGauge = metricRegistry.addDoubleGauge(NAME_2, DESCRIPTION, UNIT, LABEL_KEY);
+    DoublePoint doublePoint = doubleGauge.getOrCreateTimeSeries(LABEL_VALUES);
+    doublePoint.set(-300.13);
+    DerivedLongGauge derivedLongGauge =
+        metricRegistry.addDerivedLongGauge(NAME_3, DESCRIPTION, UNIT, LABEL_KEY);
+    derivedLongGauge.createTimeSeries(LABEL_VALUES, null, longFunction);
+    DerivedDoubleGauge derivedDoubleGauge =
+        metricRegistry.addDerivedDoubleGauge(NAME_4, DESCRIPTION, UNIT, LABEL_KEY);
+    derivedDoubleGauge.createTimeSeries(LABEL_VALUES, null, doubleFunction);
+
+    Collection<Metric> metricCollections = metricRegistry.getMetricProducer().getMetrics();
+    assertThat(metricCollections.size()).isEqualTo(4);
+    assertThat(metricCollections)
+        .containsExactly(
+            Metric.createWithOneTimeSeries(
+                LONG_METRIC_DESCRIPTOR,
+                TimeSeries.createWithOnePoint(
+                    LABEL_VALUES, Point.create(Value.longValue(200), TEST_TIME), null)),
+            Metric.createWithOneTimeSeries(
+                DOUBLE_METRIC_DESCRIPTOR,
+                TimeSeries.createWithOnePoint(
+                    LABEL_VALUES, Point.create(Value.doubleValue(-300.13), TEST_TIME), null)),
+            Metric.createWithOneTimeSeries(
+                DERIVED_LONG_METRIC_DESCRIPTOR,
+                TimeSeries.createWithOnePoint(
+                    LABEL_VALUES, Point.create(Value.longValue(5), TEST_TIME), null)),
+            Metric.createWithOneTimeSeries(
+                DERIVED_DOUBLE_METRIC_DESCRIPTOR,
+                TimeSeries.createWithOnePoint(
+                    LABEL_VALUES, Point.create(Value.doubleValue(5.0), TEST_TIME), null)));
+  }
+
+  @Test
+  public void registerDifferentMetricSameName() {
+    metricRegistry.addLongGauge(NAME, DESCRIPTION, UNIT, LABEL_KEY);
+    thrown.expect(IllegalArgumentException.class);
+    thrown.expectMessage("A different metric with the same name already registered.");
+    metricRegistry.addDoubleGauge(NAME, DESCRIPTION, UNIT, LABEL_KEY);
+  }
+}