CODEWITHSUNDEEP
phpphpunit
Mihkel Viilveer
Mihkel Viilveer

Reputation: 432

How to test function where return data is taken from another function?

I'm new to PHP Unit and now I have a dilemma.

Function structure is something like this:

function myfunc($arg) {
  $data = $anotherobject->myfunc2($arg);
  $diffdata = $anotherobject->myfunc3($arg);
  return $data. " ".arg. " ". $diffdata;
}

How can I verifiy that the output is what it should be?

Upvotes: 0

Views: 70

Answers (2)

qrazi
qrazi

Reputation: 1391

Edit: Jasir is of course also right. The point of unittesting is to test a unit as small as possible. So you would also make tests to cover myfunc2() and myfunc3().

End of edit

Using a stub, you can set myfunc2() and myfunc3() to return a known value. You can then assert the return of myfunc as you would normally do.

Something along the lines of:

<?php
require_once 'SomeClass.php';

class StubTest extends PHPUnit_Framework_TestCase
{
    public function testStub()
    {
           // Create a stub for the SomeClass class.
           $stub = $this->getMock('SomeClass');

           // Configure the stub.
           $stub->expects($this->any())
               ->method('myfunc2')
               ->will($this->returnValue('foo'));

           $stub->expects($this->any())
               ->method('myfunc3')
               ->will($this->returnValue('bar'));

            // Calling $stub->doSomething() will now return
            // 'foo'.
            $this->assertEquals('foo somearg bar', $stub->myfunc('somearg'));
        }
    }
?>

Upvotes: 2

jasir
jasir

Reputation: 1471

You should test myfunc() output only. If you need to test myfunc2(), myfunct3(), make separate tests for them.

function test_myfunc() {
   ...
}

function test_myfunc2() {
   ...
}

function test_myfunc3() {
   ...
}

Upvotes: 1

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