Answer by bdsl for PHPUnit Mock Change the expectations later

Continue building the mock in setUp() but set the expectation separately in each test:

class FooTest extends PHPUnit_Framework_TestCase {  private $myservice;  private $foo;  public function setUp(){    $this->myService = $this->getMockBuilder('myservice')->getMock();    $this->foo = new Foo($this->myService);  }  public function testUniqueThing(){     $this->myservice        ->expects($this->any())        ->method('checkUniqueness')        ->will($this->returnValue(true));     $this->assertEqual('baz', $this->foo->calculateTheThing());  }  public function testNonUniqueThing(){     $this->myservice        ->expects($this->any())        ->method('checkUniqueness')        ->will($this->returnValue(false));     $this->assertEqual('bar', $this->foo->calculateTheThing());  }}

The two expectations will not interfere with each other because PHPUnit instantiates a new instance of FooTest to run each test.