--- jsr166/src/test/tck/JSR166TestCase.java	2017/05/14 03:12:05	1.227
+++ jsr166/src/test/tck/JSR166TestCase.java	2017/05/15 17:02:46	1.231
@@ -1066,8 +1066,8 @@ public class JSR166TestCase extends Test
      * Checks that thread eventually enters the expected blocked thread state.
      */
     void assertThreadBlocks(Thread thread, Thread.State expected) {
-        // always sleep at least 1 ms, avoiding transitional states
-        // with high probability
+        // always sleep at least 1 ms, with high probability avoiding
+        // transitory states
         for (long retries = LONG_DELAY_MS * 3 / 4; retries-->0; ) {
             try { delay(1); }
             catch (InterruptedException fail) {
@@ -1085,6 +1085,7 @@ public class JSR166TestCase extends Test
     /**
      * Checks that thread does not terminate within the default
      * millisecond delay of {@code timeoutMillis()}.
+     * TODO: REMOVEME
      */
     void assertThreadStaysAlive(Thread thread) {
         assertThreadStaysAlive(thread, timeoutMillis());
@@ -1092,6 +1093,7 @@ public class JSR166TestCase extends Test
 
     /**
      * Checks that thread does not terminate within the given millisecond delay.
+     * TODO: REMOVEME
      */
     void assertThreadStaysAlive(Thread thread, long millis) {
         try {
@@ -1101,6 +1103,30 @@ public class JSR166TestCase extends Test
         } catch (InterruptedException fail) {
             threadFail("Unexpected InterruptedException");
         }
+    }
+
+    /**
+     * Checks that the threads do not terminate within the default
+     * millisecond delay of {@code timeoutMillis()}.
+     * TODO: REMOVEME
+     */
+    void assertThreadsStayAlive(Thread... threads) {
+        assertThreadsStayAlive(timeoutMillis(), threads);
+    }
+
+    /**
+     * Checks that the threads do not terminate within the given millisecond delay.
+     * TODO: REMOVEME
+     */
+    void assertThreadsStayAlive(long millis, Thread... threads) {
+        try {
+            // No need to optimize the failing case via Thread.join.
+            delay(millis);
+            for (Thread thread : threads)
+                assertTrue(thread.isAlive());
+        } catch (InterruptedException fail) {
+            threadFail("Unexpected InterruptedException");
+        }
     }
 
     /**