dependency-injection-as-a-tool-for-testing-inject-bar-test.php

<?php

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

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

        $this->assertInternalType('array', $user, 'The return of (doSomething) was not an array');
        // .. assert that Bar has changed the state of the database
    }
}