function ProtectedPrivatesTest::testPrivateAdd

Test ProtectedPrivate::privateAdd().

We want to test a private method on a class. This is problematic because, by design, we don't have access to this method. However, we do have a tool available to help us out with this problem: We can override the accessibility of a method using reflection.

@dataProvider addDataProvider

File

phpunit_example/tests/src/Unit/ProtectedPrivatesTest.php, line 72

Class

ProtectedPrivatesTest

ProtectedPrivates unit testing of restricted methods.

Namespace

Code

public function testPrivateAdd($expected, $a, $b) {
    // Get a reflected, accessible version of the privateAdd() method.
    $private_method = $this->getAccessibleMethod('Drupal\\phpunit_example\\ProtectedPrivates', 'privateAdd');
    // Create a new ProtectedPrivates object.
    $pp = new ProtectedPrivates();
    // Use the reflection to invoke on the object.
    $sum = $private_method->invokeArgs($pp, [
        $a,
        $b,
    ]);
    // Make an assertion.
    $this->assertEquals($expected, $sum);
}