1 files changed, 119 insertions, 0 deletions
diff --git a/api/src/test/java/io/opencensus/trace/SpanTest.java b/api/src/test/java/io/opencensus/trace/SpanTest.java
new file mode 100644
index 00000000..f7546ca4
--- /dev/null
+++ b/api/src/test/java/io/opencensus/trace/SpanTest.java
@@ -0,0 +1,119 @@
+/*
+ * 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;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.Matchers.eq;
+import static org.mockito.Matchers.same;
+import static org.mockito.Mockito.verify;
+
+import java.util.Collections;
+import java.util.EnumSet;
+import java.util.Random;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+import org.mockito.Mockito;
+
+/** Unit tests for {@link Span}. */
+@RunWith(JUnit4.class)
+public class SpanTest {
+  private Random random;
+  private SpanContext spanContext;
+  private SpanContext notSampledSpanContext;
+  private EnumSet<Span.Options> spanOptions;
+
+  @Before
+  public void setUp() {
+    random = new Random(1234);
+    spanContext =
+        SpanContext.create(
+            TraceId.generateRandomId(random),
+            SpanId.generateRandomId(random),
+            TraceOptions.builder().setIsSampled(true).build());
+    notSampledSpanContext =
+        SpanContext.create(
+            TraceId.generateRandomId(random),
+            SpanId.generateRandomId(random),
+            TraceOptions.DEFAULT);
+    spanOptions = EnumSet.of(Span.Options.RECORD_EVENTS);
+  }
+
+  @Test(expected = NullPointerException.class)
+  public void newSpan_WithNullContext() {
+    new NoopSpan(null, null);
+  }
+
+  @Test(expected = IllegalArgumentException.class)
+  public void newSpan_SampledContextAndNullOptions() {
+    new NoopSpan(spanContext, null);
+  }
+
+  @Test(expected = IllegalArgumentException.class)
+  public void newSpan_SampledContextAndEmptyOptions() {
+    new NoopSpan(spanContext, EnumSet.noneOf(Span.Options.class));
+  }
+
+  @Test
+  public void getOptions_WhenNullOptions() {
+    Span span = new NoopSpan(notSampledSpanContext, null);
+    assertThat(span.getOptions()).isEmpty();
+  }
+
+  @Test
+  public void getContextAndOptions() {
+    Span span = new NoopSpan(spanContext, spanOptions);
+    assertThat(span.getContext()).isEqualTo(spanContext);
+    assertThat(span.getOptions()).isEqualTo(spanOptions);
+  }
+
+  @Test
+  public void putAttributeCallsAddAttributesByDefault() {
+    Span span = Mockito.spy(new NoopSpan(spanContext, spanOptions));
+    span.putAttribute("MyKey", AttributeValue.booleanAttributeValue(true));
+    span.end();
+    verify(span)
+        .putAttributes(
+            eq(Collections.singletonMap("MyKey", AttributeValue.booleanAttributeValue(true))));
+  }
+
+  @Test
+  public void endCallsEndWithDefaultOptions() {
+    Span span = Mockito.spy(new NoopSpan(spanContext, spanOptions));
+    span.end();
+    verify(span).end(same(EndSpanOptions.DEFAULT));
+  }
+
+  @Test
+  public void addMessageEventDefaultImplementation() {
+    Span mockSpan = Mockito.mock(Span.class);
+    MessageEvent messageEvent =
+        MessageEvent.builder(MessageEvent.Type.SENT, 123)
+            .setUncompressedMessageSize(456)
+            .setCompressedMessageSize(789)
+            .build();
+    NetworkEvent networkEvent =
+        NetworkEvent.builder(NetworkEvent.Type.SENT, 123)
+            .setUncompressedMessageSize(456)
+            .setCompressedMessageSize(789)
+            .build();
+    Mockito.doCallRealMethod().when(mockSpan).addMessageEvent(messageEvent);
+    mockSpan.addMessageEvent(messageEvent);
+    verify(mockSpan).addNetworkEvent(eq(networkEvent));
+  }
+}