Add NoopRunningSpanStore and NoopSampledSpanStore.

5 files changed, 165 insertions, 10 deletions

diff --git a/api/src/test/java/io/opencensus/trace/TraceComponentTest.java b/api/src/test/java/io/opencensus/trace/TraceComponentTest.java
index a086efe3..1c3f07d5 100644
--- a/api/src/test/java/io/opencensus/trace/TraceComponentTest.java
+++ b/api/src/test/java/io/opencensus/trace/TraceComponentTest.java
@@ -31,29 +31,29 @@ import org.junit.runners.JUnit4;
 public class TraceComponentTest {
   @Test
   public void defaultTracer() {
-    assertThat(TraceComponent.getNoopTraceComponent().getTracer()).isSameAs(Tracer.getNoopTracer());
+    assertThat(TraceComponent.newNoopTraceComponent().getTracer()).isSameAs(Tracer.getNoopTracer());
   }
 
   @Test
   public void defaultBinaryPropagationHandler() {
-    assertThat(TraceComponent.getNoopTraceComponent().getPropagationComponent())
+    assertThat(TraceComponent.newNoopTraceComponent().getPropagationComponent())
         .isSameAs(PropagationComponent.getNoopPropagationComponent());
   }
 
   @Test
   public void defaultClock() {
-    assertThat(TraceComponent.getNoopTraceComponent().getClock()).isInstanceOf(ZeroTimeClock.class);
+    assertThat(TraceComponent.newNoopTraceComponent().getClock()).isInstanceOf(ZeroTimeClock.class);
   }
 
   @Test
   public void defaultTraceExporter() {
-    assertThat(TraceComponent.getNoopTraceComponent().getExportComponent())
-        .isSameAs(ExportComponent.getNoopExportComponent());
+    assertThat(TraceComponent.newNoopTraceComponent().getExportComponent())
+        .isInstanceOf(ExportComponent.newNoopExportComponent().getClass());
   }
 
   @Test
   public void defaultTraceConfig() {
-    assertThat(TraceComponent.getNoopTraceComponent().getTraceConfig())
+    assertThat(TraceComponent.newNoopTraceComponent().getTraceConfig())
         .isSameAs(TraceConfig.getNoopTraceConfig());
   }
 }
diff --git a/api/src/test/java/io/opencensus/trace/TracingTest.java b/api/src/test/java/io/opencensus/trace/TracingTest.java
index a4245e6f..e7c93a95 100644
--- a/api/src/test/java/io/opencensus/trace/TracingTest.java
+++ b/api/src/test/java/io/opencensus/trace/TracingTest.java
@@ -72,7 +72,8 @@ public class TracingTest {
 
   @Test
   public void defaultTraceExporter() {
-    assertThat(Tracing.getExportComponent()).isSameAs(ExportComponent.getNoopExportComponent());
+    assertThat(Tracing.getExportComponent())
+        .isInstanceOf(ExportComponent.newNoopExportComponent().getClass());
   }
 
   @Test
diff --git a/api/src/test/java/io/opencensus/trace/export/ExportComponentTest.java b/api/src/test/java/io/opencensus/trace/export/ExportComponentTest.java
index 01c1a086..d7f385d0 100644
--- a/api/src/test/java/io/opencensus/trace/export/ExportComponentTest.java
+++ b/api/src/test/java/io/opencensus/trace/export/ExportComponentTest.java
@@ -25,7 +25,7 @@ import org.junit.runners.JUnit4;
 /** Unit tests for {@link ExportComponent}. */
 @RunWith(JUnit4.class)
 public class ExportComponentTest {
-  private final ExportComponent exportComponent = ExportComponent.getNoopExportComponent();
+  private final ExportComponent exportComponent = ExportComponent.newNoopExportComponent();
 
   @Test
   public void implementationOfSpanExporter() {
@@ -34,11 +34,13 @@ public class ExportComponentTest {
 
   @Test
   public void implementationOfActiveSpans() {
-    assertThat(exportComponent.getRunningSpanStore()).isNull();
+    assertThat(exportComponent.getRunningSpanStore())
+        .isEqualTo(RunningSpanStore.getNoopRunningSpanStore());
   }
 
   @Test
   public void implementationOfSampledSpanStore() {
-    assertThat(exportComponent.getSampledSpanStore()).isNull();
+    assertThat(exportComponent.getSampledSpanStore())
+        .isInstanceOf(SampledSpanStore.newNoopSampledSpanStore().getClass());
   }
 }
diff --git a/api/src/test/java/io/opencensus/trace/export/NoopRunningSpanStoreTest.java b/api/src/test/java/io/opencensus/trace/export/NoopRunningSpanStoreTest.java
new file mode 100644
index 00000000..960da27c
--- /dev/null
+++ b/api/src/test/java/io/opencensus/trace/export/NoopRunningSpanStoreTest.java
@@ -0,0 +1,55 @@
+/*
+ * 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 java.util.Collection;
+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 NoopRunningSpanStore}. */
+@RunWith(JUnit4.class)
+public final class NoopRunningSpanStoreTest {
+
+  private final RunningSpanStore runningSpanStore =
+      ExportComponent.newNoopExportComponent().getRunningSpanStore();
+
+  @Rule public final ExpectedException thrown = ExpectedException.none();
+
+  @Test
+  public void noopRunningSpanStore_GetSummary() {
+    RunningSpanStore.Summary summary = runningSpanStore.getSummary();
+    assertThat(summary.getPerSpanNameSummary()).isEmpty();
+  }
+
+  @Test
+  public void noopRunningSpanStore_GetRunningSpans_DisallowsNull() {
+    thrown.expect(NullPointerException.class);
+    runningSpanStore.getRunningSpans(null);
+  }
+
+  @Test
+  public void noopRunningSpanStore_GetRunningSpans() {
+    Collection<SpanData> runningSpans =
+        runningSpanStore.getRunningSpans(RunningSpanStore.Filter.create("TestSpan", 0));
+    assertThat(runningSpans).isEmpty();
+  }
+}
diff --git a/api/src/test/java/io/opencensus/trace/export/NoopSampledSpanStoreTest.java b/api/src/test/java/io/opencensus/trace/export/NoopSampledSpanStoreTest.java
new file mode 100644
index 00000000..97bc6ea9
--- /dev/null
+++ b/api/src/test/java/io/opencensus/trace/export/NoopSampledSpanStoreTest.java
@@ -0,0 +1,97 @@
+/*
+ * 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.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit tests for {@link NoopSampledSpanStore}. */
+@RunWith(JUnit4.class)
+public final class NoopSampledSpanStoreTest {
+
+  @Rule public final ExpectedException thrown = ExpectedException.none();
+  private final SampledSpanStore.PerSpanNameSummary emptyPerSpanNameSummary =
+      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", emptyPerSpanNameSummary,
+            "TestSpan2", emptyPerSpanNameSummary,
+            "TestSpan3", emptyPerSpanNameSummary);
+
+    // should unregister specific spanNames
+    sampledSpanStore.unregisterSpanNamesForCollection(
+        Collections.unmodifiableList(Lists.newArrayList("TestSpan1", "TestSpan3")));
+    summary = sampledSpanStore.getSummary();
+    assertThat(summary.getPerSpanNameSummary())
+        .containsExactly("TestSpan2", emptyPerSpanNameSummary);
+  }
+
+  @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");
+  }
+}