有什么办法在 PHPUnit 测试中 期望"输出到 error_log?

本教程将介绍有没有办法在 PHPUnit 测试中“期望"输出到 error_log?的处理方法,这篇教程是从别的地方看到的,然后加了一些国外程序员的疑问与解答,希望能对你有所帮助,好了,下面开始学习吧。

有什么办法在 PHPUnit 测试中 期望"输出到 error_log? 教程 第1张

问题描述

Is there any way to run a test on output created from a call to 'error_log("Message")' when doing unit tests with phpunit?

Example code, one of my functions tests a credit card with a luhn algorithm:

if($checkLuhn && ($this->_luhn_check($cardNumber) == false)) {
 error_log(__METHOD__ . " cardNumber failed luhn algorithm check.");
 return false;
}

$checkLuhn is a boolean passed in to tell it whether to do the check, the _luhn_check() returns true if the $cardNumber passes. Problem is, I have more than one test in this function that can return false. I can use assertEquals on the return value, but also want to check why the error was thrown.

Can you override error_log or otherwise grab syslog output in a unit test somehow?

解决方案

There are a few different ways to direct where error_log() sends data.

First is to just as error_log() to send it some where else. An example would be:

error_log( 'This is a message from error_log()', 3, '/dev/stdout' );

That uses the destination option for error_log().

Another approach is to override the error_log ini setting in PHP. That would look something like:

$cur_error_log = ini_get( 'error_log' );
ini_set( 'error_log', '/dev/stdout' );
error_log( 'This is a message from error_log()' );
ini_set( 'error_log', $cur_error_log );

Of the two options I generally prefer using the destination option in error_log() when possible.

From there you could use expectOutputString() from PHPUnit to look for the data sent from error_log().

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