Work on issue junit-team#1365, cleared interrupt status flag in runLe…

…af method of parent runner

src/main/java/org/junit/runners/ParentRunner.java

@@ -353,6 +353,7 @@ protected final void runLeaf(Statement statement, Description description,
             eachNotifier.addFailure(e);
         } finally {
             eachNotifier.fireTestFinished();
+            Thread.interrupted(); // clear the interrupt status flag for test isolation
         }
     }
 

src/test/java/org/junit/tests/running/classes/ThreadsTest.java

@@ -0,0 +1,43 @@
+package org.junit.tests.running.classes;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+
+import org.junit.Test;
+import org.junit.runner.Description;
+import org.junit.runner.JUnitCore;
+import org.junit.runner.Result;
+import org.junit.runner.notification.RunListener;
+
+public class ThreadsTest {
+
+  public static class TestWithInterrupt {
+
+    @Test
+    public void interruptCurrentThread() {
+      assertFalse(Thread.interrupted());
+
+      Thread.currentThread().interrupt();
+    }
+
+    @Test
+    public void otherTestCase() {
+      assertFalse(Thread.interrupted());
+
+      Thread.currentThread().interrupt();
+    }
+  }
+
+  @Test
+  public void interruptStatusIsClearedAfterTestExecution() {
+    JUnitCore jUnitCore = new JUnitCore();
+    jUnitCore.addListener(new RunListener() {
+      @Override
+      public void testStarted(Description description) {
+        System.out.println(description.getMethodName());
+      }
+    });
+
+    Result result = jUnitCore.run(TestWithInterrupt.class);
+    assertEquals(0, result.getFailureCount());
+  }
+}