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Allow mocking otherwise unmockable functions with PHPUnit
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README.md

PHPUnit function mocker extension

Allows mocking otherwise untestable PHP functions through the use of namespaces.

Gitter Build Status Dependency Status Average time to resolve an issue Percentage of issues still open

<?php
namespace MyNamespace;

class Tool
{
    public function isString($string)
    {
        return strlen($string) > 0 && ctype_alpha($string);
    }
}
<?php

require_once 'PHPUnit/Extension/FunctionMocker.php';

class MyTestCase extends PHPUnit_Framework_TestCase
{
    public function setUp()
    {
        $this->php = PHPUnit_Extension_FunctionMocker::start($this, 'MyNamespace')
            ->mockFunction('strlen')
            ->mockFunction('ctype_alpha')
            ->getMock();
    }

    /** @runInSeparateProcess */
    public function testIsStringUsesStrlenAndCtypeAlpha()
    {
        $this->php
            ->expects($this->once())
            ->method('strlen')
            ->with('foo')
            ->will($this->returnValue(3))
        ;
        $this->php
            ->expects($this->once())
            ->method('ctype_alpha')
            ->with('foo')
            ->will($this->returnValue(false))
        ;

        $tool = new MyNamespace\Tool();
        $this->assertFalse($tool->isString('foo'));
    }
}

NOTE

Use @runInSeparateProcess annotation to make sure that the mocking is reliably working in PHP >=5.4

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