--- jsr166/src/test/tck/TimeUnitTest.java	2019/08/11 22:29:27	1.33
+++ jsr166/src/test/tck/TimeUnitTest.java	2019/09/04 22:18:03	1.34
@@ -581,7 +581,7 @@ public class TimeUnitTest extends JSR166
     }
 
     /**
-     * timedSleep throws InterruptedException when interrupted
+     * timeUnit.sleep throws InterruptedException when interrupted
      */
     public void testTimedSleep_Interruptible() {
         final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
@@ -613,6 +613,19 @@ public class TimeUnitTest extends JSR166
     }
 
     /**
+     * timeUnit.sleep(x) for x <= 0 does not sleep at all.
+     */
+    public void testTimedSleep_nonPositive() throws InterruptedException {
+	long startTime = System.nanoTime();
+	boolean interrupt = randomBoolean();
+	if (interrupt) Thread.currentThread().interrupt();
+	randomTimeUnit().sleep(0L);
+	randomTimeUnit().sleep(-1L);
+	randomTimeUnit().sleep(Long.MIN_VALUE);
+	if (interrupt) assertTrue(Thread.interrupted());
+    }
+
+    /**
      * a deserialized/reserialized unit is the same instance
      */
     public void testSerialization() throws Exception {