1 files changed, 94 insertions, 0 deletions
diff --git a/api/src/test/java/io/opencensus/trace/export/NoopSampledSpanStoreTest.java b/api/src/test/java/io/opencensus/trace/export/NoopSampledSpanStoreTest.java
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+++ b/api/src/test/java/io/opencensus/trace/export/NoopSampledSpanStoreTest.java
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+/*
+ * 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.trace.export;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.common.collect.Lists;
+import io.opencensus.trace.Status.CanonicalCode;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Set;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit tests for {@link NoopSampledSpanStore}. */
+@RunWith(JUnit4.class)
+public final class NoopSampledSpanStoreTest {
+
+  private static final SampledSpanStore.PerSpanNameSummary EMPTY_PER_SPAN_NAME_SUMMARY =
+      SampledSpanStore.PerSpanNameSummary.create(
+          Collections.<SampledSpanStore.LatencyBucketBoundaries, Integer>emptyMap(),
+          Collections.<CanonicalCode, Integer>emptyMap());
+
+  @Test
+  public void noopSampledSpanStore_RegisterUnregisterAndGetSummary() {
+    // should return empty before register
+    SampledSpanStore sampledSpanStore =
+        ExportComponent.newNoopExportComponent().getSampledSpanStore();
+    SampledSpanStore.Summary summary = sampledSpanStore.getSummary();
+    assertThat(summary.getPerSpanNameSummary()).isEmpty();
+
+    // should return non-empty summaries with zero latency/error sampled spans after register
+    sampledSpanStore.registerSpanNamesForCollection(
+        Collections.unmodifiableList(Lists.newArrayList("TestSpan1", "TestSpan2", "TestSpan3")));
+    summary = sampledSpanStore.getSummary();
+    assertThat(summary.getPerSpanNameSummary())
+        .containsExactly(
+            "TestSpan1", EMPTY_PER_SPAN_NAME_SUMMARY,
+            "TestSpan2", EMPTY_PER_SPAN_NAME_SUMMARY,
+            "TestSpan3", EMPTY_PER_SPAN_NAME_SUMMARY);
+
+    // should unregister specific spanNames
+    sampledSpanStore.unregisterSpanNamesForCollection(
+        Collections.unmodifiableList(Lists.newArrayList("TestSpan1", "TestSpan3")));
+    summary = sampledSpanStore.getSummary();
+    assertThat(summary.getPerSpanNameSummary())
+        .containsExactly("TestSpan2", EMPTY_PER_SPAN_NAME_SUMMARY);
+  }
+
+  @Test
+  public void noopSampledSpanStore_GetLatencySampledSpans() {
+    SampledSpanStore sampledSpanStore =
+        ExportComponent.newNoopExportComponent().getSampledSpanStore();
+    Collection<SpanData> latencySampledSpans =
+        sampledSpanStore.getLatencySampledSpans(
+            SampledSpanStore.LatencyFilter.create("TestLatencyFilter", 0, 0, 0));
+    assertThat(latencySampledSpans).isEmpty();
+  }
+
+  @Test
+  public void noopSampledSpanStore_GetErrorSampledSpans() {
+    SampledSpanStore sampledSpanStore =
+        ExportComponent.newNoopExportComponent().getSampledSpanStore();
+    Collection<SpanData> errorSampledSpans =
+        sampledSpanStore.getErrorSampledSpans(
+            SampledSpanStore.ErrorFilter.create("TestErrorFilter", null, 0));
+    assertThat(errorSampledSpans).isEmpty();
+  }
+
+  @Test
+  public void noopSampledSpanStore_GetRegisteredSpanNamesForCollection() {
+    SampledSpanStore sampledSpanStore =
+        ExportComponent.newNoopExportComponent().getSampledSpanStore();
+    sampledSpanStore.registerSpanNamesForCollection(
+        Collections.unmodifiableList(Lists.newArrayList("TestSpan3", "TestSpan4")));
+    Set<String> registeredSpanNames = sampledSpanStore.getRegisteredSpanNamesForCollection();
+    assertThat(registeredSpanNames).containsExactly("TestSpan3", "TestSpan4");
+  }
+}