PHPUnit:验证该数组是否具有给定值的键 [英] PHPUnit: Verifying that array has a key with given value

问题描述

提供以下课程:

<?php
class Example {
    private $Other;

    public function __construct ($Other)
    {
        $this->Other = $Other;
    }

    public function query ()
    {   
        $params = array(
            'key1' => 'Value 1'
            , 'key2' => 'Value 2'
        );

        $this->Other->post($params);
    }
}

这个测试用例:

<?php
require_once 'Example.php';
require_once 'PHPUnit/Framework.php';

class ExampleTest extends PHPUnit_Framework_TestCase {

    public function test_query_key1_value ()
    {   
        $Mock = $this->getMock('Other', array('post'));

        $Mock->expects($this->once())
              ->method('post')
              ->with(YOUR_IDEA_HERE);

        $Example = new Example($Mock);
        $Example->query();
    }

我如何验证$params(它是一个数组)并传递给$Other->post()包含一个名为'key1'且值为'Value 1'的键?

How do I verify that $params (which is an array) and is passed to $Other->post() contains a key named 'key1' that has a value of 'Value 1'?

我不想验证所有数组-这只是一个示例代码，在实际代码中，传递的数组具有更多的值，我只想验证其中的单个键/值对.

I do not want to verify all of the array - this is just a sample code, in actual code the passed array has a lot more values, I want to verify just a single key/value pair in there.

我可以使用$this->arrayHasKey('keyname')来验证密钥是否存在.

There is $this->arrayHasKey('keyname') that I can use to verify that the key exists.

还有$this->contains('Value 1')，可用于验证数组具有此值.

There is also $this->contains('Value 1'), which can be used to verify that the array has this value.

我什至可以将这两个与$this->logicalAnd结合在一起.但这当然不能得到理想的结果.

I could even combine those two with $this->logicalAnd. But this of course does not give the desired result.

到目前为止，我一直在使用returnCallback，捕获整个$ params，然后对此进行断言，但是也许还有另一种方式可以实现我想要的功能吗?

So far I have been using returnCallback, capturing the whole $params and then doing asserts on that, but is there perhaps another way to do what I want?

推荐答案

我最终基于属性one创建了自己的约束类

I ended up creating my own constraint class, based on the attribute one

<?php
class Test_Constraint_ArrayHas extends PHPUnit_Framework_Constraint
{
    protected $arrayKey;

    protected $constraint;

    protected $value;

    /**
     * @param PHPUnit_Framework_Constraint $constraint
     * @param string                       $arrayKey
     */
    public function __construct(PHPUnit_Framework_Constraint $constraint, $arrayKey)
    {
        $this->constraint  = $constraint;
        $this->arrayKey    = $arrayKey;
    }


    /**
     * Evaluates the constraint for parameter $other. Returns TRUE if the
     * constraint is met, FALSE otherwise.
     *
     * @param mixed $other Value or object to evaluate.
     * @return bool
     */
    public function evaluate($other)
    {
        if (!array_key_exists($this->arrayKey, $other)) {
            return false;
        }

        $this->value = $other[$this->arrayKey];

        return $this->constraint->evaluate($other[$this->arrayKey]);
    }

    /**
     * @param   mixed   $other The value passed to evaluate() which failed the
     *                         constraint check.
     * @param   string  $description A string with extra description of what was
     *                               going on while the evaluation failed.
     * @param   boolean $not Flag to indicate negation.
     * @throws  PHPUnit_Framework_ExpectationFailedException
     */
    public function fail($other, $description, $not = FALSE)
    {
        parent::fail($other[$this->arrayKey], $description, $not);
    }


    /**
     * Returns a string representation of the constraint.
     *
     * @return string
     */
    public function toString ()
    {
        return 'the value of key "' . $this->arrayKey . '"(' . $this->value . ') ' .  $this->constraint->toString();
    }


    /**
     * Counts the number of constraint elements.
     *
     * @return integer
     */
    public function count ()
    {
        return count($this->constraint) + 1;
    }


    protected function customFailureDescription ($other, $description, $not)
    {
        return sprintf('Failed asserting that %s.', $this->toString());
    }

它可以这样使用:

 ... ->with(new Test_Constraint_ArrayHas($this->equalTo($value), $key));

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