Mock

mockery.php

<?php

$mock = \Mockery::mock('FQCN');
$mock
    ->shouldReceive('foo')
    ->with(\Mockery::mustBe('bar'))
    ->andReturn('bar')
    ->once();

phpunit.php

<?php

$mock = $this->getMock('FQCN');
$mock
    ->expects($this->once())
    ->with($this->equalTo('foo'))
    ->will($this->returnValue('bar'));

prophecy.php

<?php

$mock = $prophet->prophesize('FQCN');
$mock
    ->foo(Argument::exact('bar'))
    ->willReturn('bar')
    ->shouldBeCalled();