CODEWITHSUNDEEP
mockingphpunit
Melchior
Melchior

Reputation: 175

Fake method of class under test

for example I have a class

class Foo {

  protected $settingUsedInloadSettings;
  protected $settings;

  public function __construct($param) {
    $this->$settingUsedInloadSettings = $param;
    $this->loadSettings();
    //do other initial stuff
  }

  protected function loadSettings() {
    $this->settings['settingToFake'] = 'some data using' 
      . $this->$settingUsedInloadSettings
      . 'and stuff from database and/or filesystem';
  }

  public function functionUnderTest() {
    //do api-calls with $this->settings['settingToFake']
  }

}

and a working test with valid data in $this->settings['settingToFake']

class FooTest extends TestCase {

  public function testFunctionToTest(){

    $classUnderTest = new Foo('settingUsedInloadSettings');

    $actual = $classUnderTest->functionUnderTest();
    $expected = ['expectedValue'];
    $this->assertEquals($expected, $actual);
  }

}

now I want loadSettings() to set Invalid data to $this->settings['settingToFake'] in a second test, to get another response from the api called in functionUnderTest()

public function testFunctionToTest(){

  //fake / mock / stub loadSettings() some how

  $classUnderTest = new Foo('settingUsedInloadSettings');

  $actual = $classUnderTest->functionUnderTest();
  $expected = ['expectedValue'];
  $this->assertEquals($expected, $actual);
}

How can I do this?

Upvotes: 0

Views: 39

Answers (1)

Philip Weinke
Philip Weinke

Reputation: 1844

You can achieve that by overriding the loadSettings method in an anonymous class in your test:

public function testFunctionToTest()
{
    $classUnderTest = new class('settingUsedInloadSettings') extends Foo {
        protected function loadSettings()
        {
           $this->settings['settingToFake'] = 'invalid value';
        }
    };

    // ...
}

Upvotes: 1

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