dependency-injection-as-a-tool-for-testing-mock.php

<?php

class FooTest extends PHPUnit_Framework_Testcase
{
    public function testDoSomethingEditsDataAndReturnsArray()
    {
        $foo = new Foo;

        $user = [
            'name' => 'Phil',
            'email' => 'hello@example.com'
        ];

        $mockBar = $this->getMock('Bar');

        $mockBar->expects($this->once())
                ->method('editAndReturnUser')
                ->with($this->equalTo(1), $this->equalTo('Phil'), $this->equalTo('hello@example.com'))
                ->will($this->returnValue($user));

        $foo->doSomething($mockBar, 1, 'Phil', 'hello@example.com');

        $this->assertInternalType('array', $user, 'The return of (doSomething) was not an array');
        $this->assertSame($user['name'], 'Phil', 'The returned user name was not as expected');
        $this->assertSame($user['email'], 'hello@example.com', 'The returned user email was not as expected');
    }
}