try { /* Setting the paper to null should throw an exception. *Thebugwastheexceptionwasnotbeingthrown.
*/ new PageFormat().setPaper(null);
settingNullWorked = true;
/* If the test succeeds we'll end up here, so write *tostandardout.
*/
} catch (NullPointerException e) {
pass();
/* The test failed if we end up here because an exception *otherthantheonewewereexpectingwasthrown.
*/
} catch (Exception e) {
fail("Instead of the expected NullPointerException, '" + e + "' was thrown.");
}
if (settingNullWorked) {
fail("The expected NullPointerException was not thrown");
}
publicstaticvoid main( String args[] ) throws InterruptedException
{
mainThread = Thread.currentThread(); try
{
init();
} catch( TestPassedException e )
{ //The test passed, so just return from main and harness will // interepret this return as a pass return;
} //At this point, neither test passed nor test failed has been // called -- either would have thrown an exception and ended the // test, so we know we have multiple threads.
//Test involves other threads, so sleep and wait for them to // called pass() or fail() try
{ Thread.sleep( sleepTime ); //Timed out, so fail the test thrownew RuntimeException( "Timed out after " + sleepTime/1000 + " seconds" );
} catch (InterruptedException e)
{ if( ! testGeneratedInterrupt ) throw e;
//reset flag in case hit this code more than once for some reason (just safety)
testGeneratedInterrupt = false; if ( theTestPassed == false )
{ thrownew RuntimeException( failureMessage );
}
}
publicstaticsynchronizedvoid pass()
{
System.out.println( "The test passed." );
System.out.println( "The test is over, hit Ctl-C to stop Java VM" ); //first check if this is executing in main thread if ( mainThread == Thread.currentThread() )
{ //Still in the main thread, so set the flag just for kicks, // and throw a test passed exception which will be caught // and end the test.
theTestPassed = true; thrownew TestPassedException();
} //pass was called from a different thread, so set the flag and interrupt // the main thead.
theTestPassed = true;
testGeneratedInterrupt = true;
mainThread.interrupt();
}//pass()
publicstaticsynchronizedvoid fail()
{ //test writer didn't specify why test failed, so give generic
fail( "it just plain failed! :-)" );
}
publicstaticsynchronizedvoid fail( String whyFailed )
{
System.out.println( "The test failed: " + whyFailed );
System.out.println( "The test is over, hit Ctl-C to stop Java VM" ); //check if this called from main thread if ( mainThread == Thread.currentThread() )
{ //If main thread, fail now 'cause not sleeping thrownew RuntimeException( whyFailed );
}
theTestPassed = false;
testGeneratedInterrupt = true;
failureMessage = whyFailed;
mainThread.interrupt();
}//fail()
}// class NullPaper
//This exception is used to exit from any level of call nesting // when it's determined that the test has passed, and immediately // end the test. class TestPassedException extends RuntimeException
{
}
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