在某些情况下，可以使用类似的东西向控制台输出一些内容

class yourTests extends PHPUnit_Framework_TestCase
{
    /* Add Warnings */
    protected function addWarning($msg, Exception $previous = null)
    {
        $add_warning = $this->getTestResultObject();
        $msg = new PHPUnit_Framework_Warning($msg, 0, $previous);
        $add_warning->addWarning($this, $msg, time());
        $this->setTestResultObject($add_warning);
    }

    /* Add errors */
    protected function addError($msg, Exception $previous = null)
    {
        $add_error = $this->getTestResultObject();
        $msg = new PHPUnit_Framework_AssertionFailedError($msg, 0, $previous);
        $add_error->addError($this, $msg, time());
        $this->setTestResultObject($add_error);
    }

    /* Add failures */
    protected function addFailure($msg, Exception $previous = null)
    {
        $add_failure = $this->getTestResultObject();
        $msg = new PHPUnit_Framework_AssertionFailedError($msg, 0, $previous);
        $add_failure->addFailure($this, $msg, time());
        $this->setTestResultObject($add_failure);
    }

    public function test_messages()
    {
        $this->addWarning("Your warning message!");
        $this->addError("Your error message!");
        $this->addFailure("Your Failure message");
    }

    /* Or just mark test states! */
    public function test_testMarking()
    {
        $this->markTestIncomplete();
        $this->markTestSkipped();
    }
}

这是从PHPUnit文档关于装置。

这应该允许您在phpunit测试生命周期的任何时候转储信息。

只需将下面代码中的__METHOD__替换为您想要输出的任何内容

例4.2:显示所有可用模板方法的示例

<?php
class TemplateMethodsTest extends PHPUnit_Framework_TestCase
{
    public static function setUpBeforeClass()
    {
        fwrite(STDOUT, __METHOD__ . "\n");
    }

    protected function setUp()
    {
        fwrite(STDOUT, __METHOD__ . "\n");
    }

    protected function assertPreConditions()
    {
        fwrite(STDOUT, __METHOD__ . "\n");
    }

    public function testOne()
    {
        fwrite(STDOUT, __METHOD__ . "\n");
        $this->assertTrue(TRUE);
    }

    public function testTwo()
    {
        fwrite(STDOUT, __METHOD__ . "\n");
        $this->assertTrue(FALSE);
    }

    protected function assertPostConditions()
    {
        fwrite(STDOUT, __METHOD__ . "\n");
    }

    protected function tearDown()
    {
        fwrite(STDOUT, __METHOD__ . "\n");
    }

    public static function tearDownAfterClass()
    {
        fwrite(STDOUT, __METHOD__ . "\n");
    }

    protected function onNotSuccessfulTest(Exception $e)
    {
        fwrite(STDOUT, __METHOD__ . "\n");
        throw $e;
    }
}
?>

可以使用Symfony\Component\Console\Output\TrimmedBufferOutput，然后像这样测试缓冲的输出字符串:

use Symfony\Component\Console\Output\TrimmedBufferOutput;

//...
public function testSomething()
{
   $output = new TrimmedBufferOutput(999);
   $output->writeln('Do something in your code with the output class...');
   
   //test the output:
   $this->assertStringContainsString('expected string...', $output->fetch());   
}

这不是漏洞，而是故意的。最好的方法是写入某种类型的日志文件，并跟踪日志以观察输出。

如果您正在尝试测试输出，请检查这个。

另外:

注意:请注意PHPUnit吞掉所有发出的输出 在测试执行期间。在严格模式下，发射的测试 输出将失败。

我必须修改这段代码的源代码才能工作，所以你需要为这个fork repos添加URL到composer，这样才能工作

class TestCase extends \PHPUnit_Framework_TestCase
{
    /**
     *  Save last response
     * @var Response|null A Response instance
     */
    static $lastResponse;
    /**
     *  Modify to save response
     *
     * @param  string $method
     * @param  string $uri
     * @param  array $parameters
     * @param  array $files
     * @param  array $server
     * @param  string $content
     * @param  bool $changeHistory
     * @return \Illuminate\Http\Response
     */
    final public function call(
        $method,
        $uri,
        $parameters = [],
        $files = [],
        $server = [],
        $content = null,
        $changeHistory = true
    ) {

        $response = parent::call($method, $uri, $parameters, $files, $server, $content, $changeHistory);
        static::$lastResponse = $this->client->getResponse();
        return $response;
    }


    /**
     * Modify message to add response text
     *
     * @param mixed $value
     * @param PHPUnit_Framework_Constraint $constraint
     * @param string $message
     * @since  Method available since Release 3.0.0
     */
    final public static function assertThat($value, PHPUnit_Framework_Constraint $constraint, $message = '')
    {
        $message .= PHP_EOL . static::$lastResponse . PHP_EOL;
        parent::assertThat($value, $constraint, $message);
    }
}

PHPUnit用ob_start()隐藏输出。我们可以暂时关闭它。

    public function log($something = null)
    {
        ob_end_clean();
        var_dump($something);
        ob_start();
    }