(help) TDD. Phpunit + DI

[djsmithme]

Assuming I had something like:

class TestedClass{
public function foo( $value ){
return 'Tested ’ . $value;
}
}

class ToTest{
public function __construct(TestedClass $class)
{
$this->class = $class;
}

public function Baz($value){
    return $this->class->foo($value);
}

}

TestedClass has already been tested. I know that ‘Tested’ is correctly been assigned and returning fine.

Would/Should I be writting unit tests for ToTest() to check that TestedClass::foo() is being called correctly as well?

If so how would you mock up the depancy so you can check that the value is correct I tried:

$TestedClass = $this->getMockBuilder('\TestedClass')
    ->disableOriginalConstructor()
    ->getMock();

$TestedClass->expects($this->once())
    ->method('foo')
    ->will($this->returnValue('return'));

// pass the mock into tested object
$Test = new \ToTest($TestedClass);

// run test
$this->assertEquals($Test->debug('rnd'), 'Testedrnd');

What I want to be able to test is

a) The TestClass::Foo is called when calling ToTest::Baz
b) The value of that based on the parameter set in ToTest::Baz

Any pointers would be much appreciated.

[ahundiak]

Add your test to the mocked method. Something like:

$TestedClass->expects($this->once())
  ->method('foo')
  ->with($this->equalTo($expected))
  ->will($this->returnValue('return'))

The with clause will have the value being passed to foo. And of course you set $expected to whatever you expect the value to be.

Been awhile since I used mockBuilder so I hope I got the syntax right. phpunit has support for a different mock framework call Prophecy which I find to be a bit clearer.

[djsmithme]

@ahundiak

->with()

being the key part, little more reading into the docs and it becomes apparent how to use it. Thank you.