class EntityReferenceSelectionUnitTest

class EntityReferenceSelectionUnitTest extends UnitTestCase {
    
    /**
     * Tests invalid default configuration.
     *
     * @covers ::defaultConfiguration
     * @covers ::resolveBackwardCompatibilityConfiguration
     */
    public function testInvalidDefaultConfiguration() {
        $this->expectException(\InvalidArgumentException::class);
        $this->expectExceptionMessage("TestSelectionWithInvalidDefaultConfiguration::defaultConfiguration() should not contain a 'handler_settings' key. All settings should be placed in the root level.");
        new TestSelectionWithInvalidDefaultConfiguration([], 'test_selector', [
            'class' => 'TestSelectionWithInvalidDefaultConfiguration',
        ]);
    }
    
    /**
     * Tests the selection handler with malformed 'handler_settings' value.
     *
     * @covers ::setConfiguration
     * @covers ::resolveBackwardCompatibilityConfiguration
     */
    public function testMalformedHandlerSettingsValue() {
        $this->expectException(\InvalidArgumentException::class);
        $this->expectExceptionMessage("The setting 'handler_settings' is reserved and cannot be used.");
        new TestSelection([
            'handler_settings' => FALSE,
        ], 'test_selector', [
            'class' => 'TestSelectionWithInvalidDefaultConfiguration',
        ]);
    }
    
    /**
     * Provides test data for ::testSetConfiguration()
     *
     * @return array
     *
     * @see \Drupal\Tests\Core\EntityReferenceSelection\testSetConfiguration
     */
    public function providerTestSetConfiguration() {
        return [
            [
                [
                    'setting1' => 'foo',
                    'setting2' => [
                        'bar' => 'bar value',
                        'baz' => 'baz value',
                    ],
                ],
            ],
            [
                [
                    'handler_settings' => [
                        'setting1' => 'foo',
                        'setting2' => [
                            'bar' => 'bar value',
                            'baz' => 'baz value',
                        ],
                    ],
                ],
            ],
            [
                [
                    'setting1' => 'foo',
                    'handler_settings' => [
                        'setting2' => [
                            'bar' => 'bar value',
                            'baz' => 'baz value',
                        ],
                    ],
                ],
            ],
            [
                [
                    'setting1' => 'foo',
                    'setting2' => [
                        'bar' => 'bar value',
                        'baz' => 'baz value',
                    ],
                    'handler_settings' => [
                        // Same setting from root level takes precedence.
'setting2' => 'this will be overwritten',
                    ],
                ],
            ],
        ];
    }
    
    /**
     * Tests selection handler plugin configuration set.
     *
     * @dataProvider providerTestSetConfiguration
     * @covers ::setConfiguration
     * @covers ::resolveBackwardCompatibilityConfiguration
     * @covers ::ensureBackwardCompatibilityConfiguration
     *
     * @param array $options
     *   The configuration passed to the plugin.
     */
    public function testSetConfiguration($options) {
        $selection = new TestSelection($options, 'test_selector', []);
        $expected = [
            'target_type' => NULL,
            'handler' => 'test_selector',
            'entity' => NULL,
            'setting1' => 'foo',
            'setting2' => [
                'qux' => 'qux value',
                'bar' => 'bar value',
                'baz' => 'baz value',
            ],
            'setting3' => 'foobar',
            'handler_settings' => [
                'setting1' => 'foo',
                'setting2' => [
                    'qux' => 'qux value',
                    'bar' => 'bar value',
                    'baz' => 'baz value',
                ],
                'setting3' => 'foobar',
            ],
        ];
        $this->assertArrayEquals($expected, $selection->getConfiguration());
    }
    
    /**
     * Tests the selection handler plugin BC structure.
     *
     * @covers ::setConfiguration
     * @covers ::resolveBackwardCompatibilityConfiguration
     * @covers ::ensureBackwardCompatibilityConfiguration
     */
    public function testSetConfigurationBcLevel() {
        $config = [
            'target_type' => 'some_entity_type_id',
            'handler' => 'test_selector',
            'setting1' => 'foo',
        ];
        $selection = new TestSelection($config, 'test_selector', []);
        $expected = [
            'target_type' => 'some_entity_type_id',
            'handler' => 'test_selector',
            'entity' => NULL,
            'setting1' => 'foo',
            'setting2' => [
                'qux' => 'qux value',
            ],
            'setting3' => 'foobar',
            'handler_settings' => [
                'setting1' => 'foo',
                'setting2' => [
                    'qux' => 'qux value',
                ],
                'setting3' => 'foobar',
            ],
        ];
        $this->assertArrayEquals($expected, $selection->getConfiguration());
        // Read the stored values and override a setting.
        $config = $selection->getConfiguration();
        $config['setting1'] = 'bar';
        $selection->setConfiguration($config);
        $expected['setting1'] = 'bar';
        $expected['handler_settings']['setting1'] = 'bar';
        $this->assertArrayEquals($expected, $selection->getConfiguration());
    }
    
    /**
     * Tests deprecation error triggering.
     *
     * @covers ::setConfiguration
     * @covers ::resolveBackwardCompatibilityConfiguration
     * @expectedDeprecation Providing settings under 'handler_settings' is deprecated in drupal:8.4.0 support for 'handler_settings' is removed from drupal:9.0.0. Move the settings in the root of the configuration array. See https://www.drupal.org/node/2870971
     */
    public function testDeprecationErrorTriggering() {
        // Configuration with BC level.
        $config = [
            'handler_settings' => [
                'setting1' => TRUE,
            ],
        ];
        new TestSelection($config, 'test_selector', []);
        // Ensure at least one assertion.
        $this->assertTrue(TRUE);
    }

}