数据提供的最佳实践-PHPUnit [英] Best Practices for Data Providing - PHPUnit

问题描述

我目前正在为一个库编写单元测试，在从数据中重构业务逻辑之后，我对现在如何测试逻辑有些困惑！

I'm currently writing units tests for a library, after refactoring business logic from the data, I'm now in a bit of confused state over how to now test the logic!

例如，我有一个相当复杂的过程，要传递一组数据，我将为此使用数据提供程序，以便确保它可以在各种情况下使用.

For example, I have a quite complex process which an array of data get's passed through, I'm going to use a data provider for this so I can make sure it will work for all sorts of cases.

有了要通过数据提供者传递的数据，我是否也应该传递预期的结果?还是应该在测试中计算出来.

With the data that I'm going to be passing in through the data provider, should I also be passing an expected outcome? Or should this be calculated in the test.

如前所述，计算过程是一个非常复杂的过程，而不是$a + $b.

As said, the process for the calculating is quite a complicated process, not quite $a + $b.

推荐答案

对于数据提供程序，我还提供了预期的结果.因为我希望该方法接受输入并返回一个值，所以我不想重复执行计算，因为其中一种实现可能有错误.

With data providers, I also provide the expected result. As I want the method to take the inputs and return a value, I do not want to implement the calculation twice, as 1 of the implementations may have an error.

由于我实际上正在测试有问题的方法/功能，因此我不打算使用模拟程序.

I am not looking to use a mock since I am actually testing the methods/functions in question.

如果我们基于4个参数进行计算，那么我的数据提供者将传递5.第一个参数是预期结果，然后是要传递给方法/函数的参数.

If we are calculating something based on 4 parameters, then my data provider will pass 5. The first parameter is the expected result, followed by the parameters to be passed to the method/function.

由此，我的电话非常简单:

From this, my call is pretty straight forward:

public static function GetRemoteAddressFromWebServerDataProvider()
{
    return array(
        array('127.0.0.1',  NULL,           '127.0.0.1'),
        array('127.0.0.1',  '127.0.0.1',    NULL),
        );
}

/**
 * @dataProvider GetRemoteAddressFromWebServerDataProvider
 */
public function testGetRemoteAddressFromWebServer($Result, $HTTPXSetting, $RemoteAddress)
{
    $_SERVER['HTTP_X_FORWARDED_FOR'] = $HTTPXSetting;
    $_SERVER['REMOTE_ADDR']          = $RemoteAddress;
    $this->assertEquals($Result, GetRemoteAddressFromWebServer());
}

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