PHP Reflection Testing private/protected methods
Example
Sometimes it's useful to test private & protected methods as well as public ones.
class Car
{
/**
* @param mixed $argument
*
* @return mixed
*/
protected function drive($argument)
{
return $argument;
}
/**
* @return bool
*/
private static function stop()
{
return true;
}
}
Easiest way to test drive method is using reflection
class DriveTest
{
/**
* @test
*/
public function testDrive()
{
// prepare
$argument = 1;
$expected = $argument;
$car = new \Car();
$reflection = new ReflectionClass(\Car::class);
$method = $reflection->getMethod('drive');
$method->setAccessible(true);
// invoke logic
$result = $method->invokeArgs($car, [$argument]);
// test
$this->assertEquals($expected, $result);
}
}
If the method is static you pass null in the place of the class instance
class StopTest
{
/**
* @test
*/
public function testStop()
{
// prepare
$expected = true;
$reflection = new ReflectionClass(\Car::class);
$method = $reflection->getMethod('stop');
$method->setAccessible(true);
// invoke logic
$result = $method->invoke(null);
// test
$this->assertEquals($expected, $result);
}
}
