1 files changed, 129 insertions, 0 deletions
diff --git a/api/src/test/java/io/opencensus/stats/MeasureTest.java b/api/src/test/java/io/opencensus/stats/MeasureTest.java
new file mode 100644
index 00000000..a9302425
--- /dev/null
+++ b/api/src/test/java/io/opencensus/stats/MeasureTest.java
@@ -0,0 +1,129 @@
+/*
+ * Copyright 2016-17, 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.stats;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.common.collect.Lists;
+import com.google.common.testing.EqualsTester;
+import io.opencensus.common.Function;
+import io.opencensus.common.Functions;
+import io.opencensus.stats.Measure.MeasureDouble;
+import io.opencensus.stats.Measure.MeasureLong;
+import java.util.Arrays;
+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;
+
+/** Tests for {@link Measure}. */
+@RunWith(JUnit4.class)
+public final class MeasureTest {
+
+  @Rule public final ExpectedException thrown = ExpectedException.none();
+
+  @Test
+  public void testConstants() {
+    assertThat(Measure.NAME_MAX_LENGTH).isEqualTo(255);
+  }
+
+  @Test
+  public void preventTooLongMeasureName() {
+    char[] chars = new char[Measure.NAME_MAX_LENGTH + 1];
+    Arrays.fill(chars, 'a');
+    String longName = String.valueOf(chars);
+    thrown.expect(IllegalArgumentException.class);
+    Measure.MeasureDouble.create(longName, "description", "1");
+  }
+
+  @Test
+  public void preventNonPrintableMeasureName() {
+    thrown.expect(IllegalArgumentException.class);
+    Measure.MeasureDouble.create("\2", "description", "1");
+  }
+
+  @Test
+  public void testMeasureDoubleComponents() {
+    Measure measurement = Measure.MeasureDouble.create("Foo", "The description of Foo", "Mbit/s");
+    assertThat(measurement.getName()).isEqualTo("Foo");
+    assertThat(measurement.getDescription()).isEqualTo("The description of Foo");
+    assertThat(measurement.getUnit()).isEqualTo("Mbit/s");
+  }
+
+  @Test
+  public void testMeasureLongComponents() {
+    Measure measurement = Measure.MeasureLong.create("Bar", "The description of Bar", "1");
+    assertThat(measurement.getName()).isEqualTo("Bar");
+    assertThat(measurement.getDescription()).isEqualTo("The description of Bar");
+    assertThat(measurement.getUnit()).isEqualTo("1");
+  }
+
+  @Test
+  public void testMeasureDoubleEquals() {
+    new EqualsTester()
+        .addEqualityGroup(
+            Measure.MeasureDouble.create("name", "description", "bit/s"),
+            Measure.MeasureDouble.create("name", "description", "bit/s"))
+        .addEqualityGroup(Measure.MeasureDouble.create("name", "description 2", "bit/s"))
+        .testEquals();
+  }
+
+  @Test
+  public void testMeasureLongEquals() {
+    new EqualsTester()
+        .addEqualityGroup(
+            Measure.MeasureLong.create("name", "description", "bit/s"),
+            Measure.MeasureLong.create("name", "description", "bit/s"))
+        .addEqualityGroup(Measure.MeasureLong.create("name", "description 2", "bit/s"))
+        .testEquals();
+  }
+
+  @Test
+  public void testMatch() {
+    List<Measure> measures =
+        Arrays.asList(
+            MeasureDouble.create("measure1", "description", "1"),
+            MeasureLong.create("measure2", "description", "1"));
+    List<String> outputs = Lists.newArrayList();
+    for (Measure measure : measures) {
+      outputs.add(
+          measure.match(
+              new Function<MeasureDouble, String>() {
+                @Override
+                public String apply(MeasureDouble arg) {
+                  return "double";
+                }
+              },
+              new Function<MeasureLong, String>() {
+                @Override
+                public String apply(MeasureLong arg) {
+                  return "long";
+                }
+              },
+              Functions.<String>throwAssertionError()));
+    }
+    assertThat(outputs).containsExactly("double", "long").inOrder();
+  }
+
+  @Test
+  public void testMeasureDoubleIsNotEqualToMeasureLong() {
+    assertThat(Measure.MeasureDouble.create("name", "description", "bit/s"))
+        .isNotEqualTo(Measure.MeasureLong.create("name", "description", "bit/s"));
+  }
+}