1 files changed, 78 insertions, 0 deletions
diff --git a/api/src/test/java/io/opencensus/common/ServerStatsTest.java b/api/src/test/java/io/opencensus/common/ServerStatsTest.java
new file mode 100644
index 00000000..620bbb4f
--- /dev/null
+++ b/api/src/test/java/io/opencensus/common/ServerStatsTest.java
@@ -0,0 +1,78 @@
+/*
+ * 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.common;
+
+import static com.google.common.truth.Truth.assertThat;
+
+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 ServerStats}. */
+@RunWith(JUnit4.class)
+public class ServerStatsTest {
+
+  @Rule public ExpectedException thrown = ExpectedException.none();
+
+  @Test
+  public void serverStatsCreate() {
+    ServerStats serverStats = null;
+
+    serverStats = ServerStats.create(31, 22, (byte) 0);
+    assertThat(serverStats.getLbLatencyNs()).isEqualTo(31);
+    assertThat(serverStats.getServiceLatencyNs()).isEqualTo(22);
+    assertThat(serverStats.getTraceOption()).isEqualTo((byte) 0);
+
+    serverStats = ServerStats.create(1000011L, 900022L, (byte) 1);
+    assertThat(serverStats.getLbLatencyNs()).isEqualTo(1000011L);
+    assertThat(serverStats.getServiceLatencyNs()).isEqualTo(900022L);
+    assertThat(serverStats.getTraceOption()).isEqualTo((byte) 1);
+
+    serverStats = ServerStats.create(0, 22, (byte) 0);
+    assertThat(serverStats.getLbLatencyNs()).isEqualTo(0);
+    assertThat(serverStats.getServiceLatencyNs()).isEqualTo(22);
+    assertThat(serverStats.getTraceOption()).isEqualTo((byte) 0);
+
+    serverStats = ServerStats.create(1010, 0, (byte) 0);
+    assertThat(serverStats.getLbLatencyNs()).isEqualTo(1010);
+    assertThat(serverStats.getServiceLatencyNs()).isEqualTo(0);
+    assertThat(serverStats.getTraceOption()).isEqualTo((byte) 0);
+  }
+
+  @Test
+  public void create_LbLatencyNegative() {
+    thrown.expect(IllegalArgumentException.class);
+    thrown.expectMessage("'getLbLatencyNs' is less than zero");
+    ServerStats.create(-1L, 100, (byte) 0);
+  }
+
+  @Test
+  public void create_ServerLatencyNegative() {
+    thrown.expect(IllegalArgumentException.class);
+    thrown.expectMessage("'getServiceLatencyNs' is less than zero");
+    ServerStats.create(100L, -1L, (byte) 0);
+  }
+
+  @Test
+  public void create_LbLatencyAndServerLatencyNegative() {
+    thrown.expect(IllegalArgumentException.class);
+    thrown.expectMessage("'getLbLatencyNs' is less than zero");
+    ServerStats.create(-100L, -1L, (byte) 0);
+  }
+}