@Test
public void testIsBlocked() {
StoptableThread thread = new TestThread2();
thread.setMaxHeartbeatInterval(2);
assertThat(thread.isBlocked()).isFalse();
thread.start();
assertThat(thread.isBlocked()).isFalse();
ThreadUtils.sleep(1);
assertThat(thread.isBlocked()).isFalse();
ThreadUtils.sleep(1.5);
assertThat(thread.isBlocked()).isTrue();
}
