<?php

require_once('PHPUnit/Framework.php');

abstract class MyClass
{
    public function foo()
    {
        return $this->bar();
    }

    protected function bar()
    {
        return 'bar';
    }

    abstract public function test();
}

class MockTest extends PHPUnit_Framework_TestCase
{
    public function testMock()
    {
        $stub = $this->getMockForAbstractClass('MyClass');

        $stub->expects($this->any())
                ->method('bar')
                ->will($this->returnValue('stub'));

        $this->assertEquals('stub', $stub->foo());
        // Returns 'bar'
    }
}