MyClassTest.php

<?php

class MyClassTest extends PHPUnit_Framework_TestCase
{
    public function setup()
    {
        $this->dependency = Phake::mock('Dependency');
        $this->myClass = new MyClassOne($this->dependency);
    }

    public function testAddNumberSendsAddNumberMessageToDependency()
    {
        $this->myClass->addNumber('one');
        Phake::verify($this->dependency)->addNumber('one');
    }

    public function testGetNumbersReturnsDependencyGetListOfNumbers()
    {
        $expected = array('one', 'two');
        Phake::when($this->dependency)->getListOfNumbers()->thenReturn($expected);

        $this->assertEquals($expected, $this->myClass->getNumbers());
    }
}