php - 什么会导致 PHPUnit 不打印非常大的错误消息？

Question

这似乎只发生在我的系统上。没有其他人可以复制它。如果错误消息太大(在我的例子中大约 65k 字节)，屏幕上不会打印任何内容。我在 Windows 7 上使用 PHP 7.1.3，默认的 php.ini(内存限制设置为 8gb)和默认的 PHPUnit 6.0.13 配置。该错误不会出现在提示符和 powershell 中。

<?php

use PHPUnit\Framework\Constraint\Constraint;
use PHPUnit\Framework\TestCase;

class MyConstraint extends Constraint
{
    protected $expected;

    function __construct($expected){
        parent::__construct();
        $this->expected = $expected;
    }

    protected function matches($actual){
        return false;
    }

    function failureDescription($other): string{
        return "desc";
    }

    function toString(){
        return "description";
    }

    function additionalFailureDescription($other): string{
        return str_repeat("x", 100000);
        // If set to a smaller dump, error will appear
        // some people I asked to try could dump one million
        // bytes without problems, while I can't print more
        // than about 50k
    }
}

class SomeTest extends TestCase
{
    function testBigDump(){
        TestCase::assertThat("irrelevant", new MyConstraint("irrelevant"));
    }
}

?>

这是我在屏幕上看到的:

PHPUnit 6.0.13 by Sebastian Bergmann and contributors.

Runtime: PHPDBG 7.1.3 Configuration: ..............

F 1 / 1 (100%)

Time: 361 ms, Memory: 6.00MB

There was 1 failure:

1) SomeTest::testBigDump

                             <------- Notice no error description here

FAILURES! Tests: 1, Assertions: 1, Failures: 1.

您知道是什么原因造成的吗？提前谢谢你。

Answer 1

您的配置中的某些东西正在通过 phpdbg 运行 phpunit 测试

我重现了这个问题，尝试使用 Windows 7 VM 尽可能多地复制环境。

线索是转储中的 Runtime: PHPDBG 行。显然，关于 phpdbg 运行时的一些事情会阻止大缓冲区正常工作。请参阅下面的输出，包括通过 phpdbg.exe 运行时的初始输出(缺少测试描述)以及通过 php.exe 运行时的初始输出(显然被截断了):

C:\project>phpdbg -r phpunit-6.1.0.phar -v test.php
[Welcome to phpdbg, the interactive PHP debugger, v0.5.0]
To get help using phpdbg type "help" and press enter
[Please report bugs to <http://bugs.php.net/report.php>]
PHPUnit 6.1.0 by Sebastian Bergmann and contributors.

Runtime:       PHPDBG 7.1.4

F                                                                   1 / 1 (100%)


Time: 99 ms, Memory: 22.00MB

There was 1 failure:

1) SomeTest::testBigDump

FAILURES!
Tests: 1, Assertions: 1, Failures: 1.
[Script ended normally]

C:\project>php phpunit-6.1.0.phar test.php
PHPUnit 6.1.0 by Sebastian Bergmann and contributors.

F                                                                   1 / 1 (100%)


Time: 109 ms, Memory: 8.00MB

There was 1 failure:

1) SomeTest::testBigDump
Failed asserting that desc.
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----- Snip -----