1 files changed, 84 insertions, 0 deletions
diff --git a/api/src/test/java/io/opencensus/trace/MessageEventTest.java b/api/src/test/java/io/opencensus/trace/MessageEventTest.java
new file mode 100644
index 00000000..fde32fe6
--- /dev/null
+++ b/api/src/test/java/io/opencensus/trace/MessageEventTest.java
@@ -0,0 +1,84 @@
+/*
+ * 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.trace;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit tests for {@link MessageEvent}. */
+@RunWith(JUnit4.class)
+public class MessageEventTest {
+  @Test(expected = NullPointerException.class)
+  public void buildMessageEvent_NullType() {
+    MessageEvent.builder(null, 1L).build();
+  }
+
+  @Test
+  public void buildMessageEvent_WithRequiredFields() {
+    MessageEvent messageEvent = MessageEvent.builder(MessageEvent.Type.SENT, 1L).build();
+    assertThat(messageEvent.getType()).isEqualTo(MessageEvent.Type.SENT);
+    assertThat(messageEvent.getMessageId()).isEqualTo(1L);
+    assertThat(messageEvent.getUncompressedMessageSize()).isEqualTo(0L);
+  }
+
+  @Test
+  public void buildMessageEvent_WithUncompressedMessageSize() {
+    MessageEvent messageEvent =
+        MessageEvent.builder(MessageEvent.Type.SENT, 1L).setUncompressedMessageSize(123L).build();
+    assertThat(messageEvent.getType()).isEqualTo(MessageEvent.Type.SENT);
+    assertThat(messageEvent.getMessageId()).isEqualTo(1L);
+    assertThat(messageEvent.getUncompressedMessageSize()).isEqualTo(123L);
+  }
+
+  @Test
+  public void buildMessageEvent_WithCompressedMessageSize() {
+    MessageEvent messageEvent =
+        MessageEvent.builder(MessageEvent.Type.SENT, 1L).setCompressedMessageSize(123L).build();
+    assertThat(messageEvent.getType()).isEqualTo(MessageEvent.Type.SENT);
+    assertThat(messageEvent.getMessageId()).isEqualTo(1L);
+    assertThat(messageEvent.getCompressedMessageSize()).isEqualTo(123L);
+  }
+
+  @Test
+  public void buildMessageEvent_WithAllValues() {
+    MessageEvent messageEvent =
+        MessageEvent.builder(MessageEvent.Type.RECEIVED, 1L)
+            .setUncompressedMessageSize(123L)
+            .setCompressedMessageSize(63L)
+            .build();
+    assertThat(messageEvent.getType()).isEqualTo(MessageEvent.Type.RECEIVED);
+    assertThat(messageEvent.getMessageId()).isEqualTo(1L);
+    assertThat(messageEvent.getUncompressedMessageSize()).isEqualTo(123L);
+    assertThat(messageEvent.getCompressedMessageSize()).isEqualTo(63L);
+  }
+
+  @Test
+  public void messageEvent_ToString() {
+    MessageEvent messageEvent =
+        MessageEvent.builder(MessageEvent.Type.SENT, 1L)
+            .setUncompressedMessageSize(123L)
+            .setCompressedMessageSize(63L)
+            .build();
+    assertThat(messageEvent.toString()).contains("type=SENT");
+    assertThat(messageEvent.toString()).contains("messageId=1");
+    assertThat(messageEvent.toString()).contains("compressedMessageSize=63");
+    assertThat(messageEvent.toString()).contains("uncompressedMessageSize=123");
+  }
+}