PHPUnit断言是否引发了异常？

class ExceptionTest extends PHPUnit_framework_TestCase{    public function testException()    {        $this->expectException(InvalidArgumentException::class);        // or for PHPUnit < 5.2        // $this->setExpectedException(InvalidArgumentException::class);        //...and then add your test pre that generates the exception         exampleMethod($anInvalidArgument);    }}