Fixing broken tests

Author: lcavadas

micrometer-core/src/main/java/io/micrometer/core/aop/TimedAspect.java

@@ -258,9 +258,12 @@ private Timer.Builder recordBuilder(ProceedingJoinPoint pjp, Timed timed, String
             .tags(EXCEPTION_TAG, exceptionClass)
             .tags(tagsBasedOnJoinPoint.apply(pjp))
             .publishPercentileHistogram(timed.histogram())
-            .serviceLevelObjectives((Duration[]) Arrays.stream(timed.serviceLevelObjectives())
-                .mapToObj(s -> Duration.ofNanos((long) TimeUtils.secondsToUnit(s, TimeUnit.NANOSECONDS)))
-                .toArray());
+            .serviceLevelObjectives(timed.serviceLevelObjectives().length > 0 ?
+                (Duration[]) Arrays.stream(timed.serviceLevelObjectives())
+                    .mapToObj(s -> Duration.ofNanos((long) TimeUtils.secondsToUnit(s, TimeUnit.NANOSECONDS)))
+                    .toArray()
+                : null
+            );
 
         if (meterTagAnnotationHandler != null) {
             meterTagAnnotationHandler.addAnnotatedParameters(builder, pjp);

micrometer-core/src/main/java/io/micrometer/core/instrument/Timer.java

@@ -102,9 +102,12 @@ static Builder builder(Timed timed, String defaultName) {
             .description(timed.description().isEmpty() ? null : timed.description())
             .publishPercentileHistogram(timed.histogram())
             .publishPercentiles(timed.percentiles().length > 0 ? timed.percentiles() : null)
-            .serviceLevelObjectives((Duration[]) Arrays.stream(timed.serviceLevelObjectives())
-                .mapToObj(s -> Duration.ofNanos((long) TimeUtils.secondsToUnit(s, TimeUnit.NANOSECONDS)))
-                .toArray());
+            .serviceLevelObjectives(timed.serviceLevelObjectives().length > 0 ?
+                (Duration[]) Arrays.stream(timed.serviceLevelObjectives())
+                    .mapToObj(s -> Duration.ofNanos((long) TimeUtils.secondsToUnit(s, TimeUnit.NANOSECONDS)))
+                    .toArray()
+                : null
+            );
     }
 
     /**