1 files changed, 53 insertions, 0 deletions
diff --git a/impl_core/src/test/java/io/opencensus/implcore/trace/config/TraceConfigImplTest.java b/impl_core/src/test/java/io/opencensus/implcore/trace/config/TraceConfigImplTest.java
new file mode 100644
index 00000000..ecaeda6d
--- /dev/null
+++ b/impl_core/src/test/java/io/opencensus/implcore/trace/config/TraceConfigImplTest.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2017, 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.trace.config;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import io.opencensus.trace.config.TraceParams;
+import io.opencensus.trace.samplers.Samplers;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit tests for {@link TraceConfigImpl}. */
+@RunWith(JUnit4.class)
+public class TraceConfigImplTest {
+  private final TraceConfigImpl traceConfig = new TraceConfigImpl();
+
+  @Test
+  public void defaultActiveTraceParams() {
+    assertThat(traceConfig.getActiveTraceParams()).isEqualTo(TraceParams.DEFAULT);
+  }
+
+  @Test
+  public void updateTraceParams() {
+    TraceParams traceParams =
+        TraceParams.DEFAULT
+            .toBuilder()
+            .setSampler(Samplers.alwaysSample())
+            .setMaxNumberOfAttributes(8)
+            .setMaxNumberOfAnnotations(9)
+            .setMaxNumberOfNetworkEvents(10)
+            .setMaxNumberOfLinks(11)
+            .build();
+    traceConfig.updateActiveTraceParams(traceParams);
+    assertThat(traceConfig.getActiveTraceParams()).isEqualTo(traceParams);
+    traceConfig.updateActiveTraceParams(TraceParams.DEFAULT);
+    assertThat(traceConfig.getActiveTraceParams()).isEqualTo(TraceParams.DEFAULT);
+  }
+}