Check SpanData.latencyNanos in unit test.

open-telemetry · Dec 17, 2019 · b7114f0 · b7114f0
1 parent bef90b7
commit b7114f0
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/sdk/src/test/java/io/opentelemetry/sdk/trace/RecordEventsReadableSpanTest.java b/sdk/src/test/java/io/opentelemetry/sdk/trace/RecordEventsReadableSpanTest.java
@@ -108,6 +108,7 @@ public void nothingChangedAfterEnd() {
         startEpochNanos,
         Status.OK,
         /*hasEnded:*/ true);
+    assertThat(spanData.getLatencyNanos()).isEqualTo(0);
   }
 
   @Test
@@ -132,6 +133,7 @@ public void toSpanData_ActiveSpan() {
               startEpochNanos + NANOS_PER_SECOND,
               "event2",
               Collections.<String, AttributeValue>emptyMap());
+      long prevLatencyNanos = span.getLatencyNanos();
       verifySpanData(
           spanData,
           expectedAttributes,
@@ -142,6 +144,8 @@ public void toSpanData_ActiveSpan() {
           0,
           Status.OK,
           /*hasEnded:*/ false);
+      assertThat(spanData.getLatencyNanos()).isAtLeast(prevLatencyNanos);
+      assertThat(spanData.getLatencyNanos()).isAtMost(span.getLatencyNanos());
       assertThat(span.hasEnded()).isFalse();
     } finally {
       span.end();
@@ -174,7 +178,7 @@ public void toSpanData_EndedSpan() {
         testClock.now(),
         Status.CANCELLED,
         /*hasEnded:*/ true);
-
+    assertThat(spanData.getLatencyNanos()).isEqualTo(testClock.now() - startEpochNanos);
   }
 
   @Test