class LinkAccessConstraintValidatorTest

class LinkAccessConstraintValidatorTest extends UnitTestCase {
    
    /**
     * Tests the access validation constraint for links.
     *
     * @param \Drupal\link\LinkItemInterface $value
     *   The link item.
     * @param \Drupal\Core\Session\AccountProxyInterface $user
     *   The user account.
     * @param bool $valid
     *   A boolean indicating if the combination is expected to be valid.
     *
     * @covers ::validate
     * @dataProvider providerValidate
     */
    public function testValidate($value, $user, $valid) {
        $context = $this->createMock(ExecutionContextInterface::class);
        if ($valid) {
            $context->expects($this->never())
                ->method('addViolation');
        }
        else {
            $context->expects($this->once())
                ->method('addViolation');
        }
        $constraint = new LinkAccessConstraint();
        $validate = new LinkAccessConstraintValidator($user);
        $validate->initialize($context);
        $validate->validate($value, $constraint);
    }
    
    /**
     * Data provider for LinkAccessConstraintValidator::validate().
     *
     * @return array
     *   An array of tests, matching the parameter inputs for testValidate.
     *
     * @see \Drupal\Tests\link\LinkAccessConstraintValidatorTest::validate()
     */
    public function providerValidate() {
        $data = [];
        $cases = [
            [
                'may_link_any_page' => TRUE,
                'url_access' => TRUE,
                'valid' => TRUE,
            ],
            [
                'may_link_any_page' => TRUE,
                'url_access' => FALSE,
                'valid' => TRUE,
            ],
            [
                'may_link_any_page' => FALSE,
                'url_access' => TRUE,
                'valid' => TRUE,
            ],
            [
                'may_link_any_page' => FALSE,
                'url_access' => FALSE,
                'valid' => FALSE,
            ],
        ];
        foreach ($cases as $case) {
            // Mock a Url object that returns a boolean indicating user access.
            $url = $this->getMockBuilder('Drupal\\Core\\Url')
                ->disableOriginalConstructor()
                ->getMock();
            $url->expects($this->once())
                ->method('access')
                ->willReturn($case['url_access']);
            // Mock a link object that returns the URL object.
            $link = $this->createMock('Drupal\\link\\LinkItemInterface');
            $link->expects($this->any())
                ->method('getUrl')
                ->willReturn($url);
            // Mock a user object that returns a boolean indicating user access to all
            // links.
            $user = $this->createMock('Drupal\\Core\\Session\\AccountProxyInterface');
            $user->expects($this->any())
                ->method('hasPermission')
                ->with($this->equalTo('link to any page'))
                ->willReturn($case['may_link_any_page']);
            $data[] = [
                $link,
                $user,
                $case['valid'],
            ];
        }
        return $data;
    }

}