1 files changed, 48 insertions, 0 deletions
diff --git a/impl/src/test/java/io/opencensus/trace/TracingTest.java b/impl/src/test/java/io/opencensus/trace/TracingTest.java
new file mode 100644
index 00000000..5f5fbeee
--- /dev/null
+++ b/impl/src/test/java/io/opencensus/trace/TracingTest.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2017, Google Inc.
+ * 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 io.opencensus.common.MillisClock;
+import io.opencensus.trace.export.ExportComponentImpl;
+import io.opencensus.trace.propagation.PropagationComponent;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Test for accessing the {@link TraceComponent} through the {@link Tracing} class. */
+@RunWith(JUnit4.class)
+public class TracingTest {
+  @Test
+  public void implementationOfTracer() {
+    assertThat(Tracing.getTracer()).isInstanceOf(TracerImpl.class);
+  }
+
+  @Test
+  public void implementationOfBinaryPropagationHandler() {
+    assertThat(Tracing.getPropagationComponent())
+        .isInstanceOf(PropagationComponent.class);
+  }
+
+  @Test
+  public void implementationOfClock() {
+    assertThat(Tracing.getClock()).isInstanceOf(MillisClock.class);
+  }
+
+  @Test
+  public void implementationOfTraceExporter() {
+    assertThat(Tracing.getTraceExporter()).isInstanceOf(ExportComponentImpl.class);
+  }
+}