您可以将setOutputCallback设置为不执行操作"功能.效果是抑制测试或测试类中打印的任何输出.

You can set the setOutputCallback to a do nothing function. The effect is to suppress any output printed in the test or in the tested class.

例如:

namespace Acme\DemoBundle\Tests;


class NoOutputTest extends \PHPUnit_Framework_TestCase {

    public function testSuppressedOutput()
    {
        // Suppress  output to console
        $this->setOutputCallback(function() {});
        print '*';
        $this->assertFalse(false, "Don't see the *");
    }

}

您可以在文档中找到一些参考.

You can find some reference in the doc

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