class DisplayVariantTest

class DisplayVariantTest extends UnitTestCase {
    
    /**
     * Sets up a display variant plugin for testing.
     *
     * @param array $configuration
     *   An array of plugin configuration.
     * @param array $definition
     *   The plugin definition array.
     *
     * @return \Drupal\Core\Display\VariantBase|\PHPUnit\Framework\MockObject\MockObject
     *   A mocked display variant plugin.
     */
    public function setUpDisplayVariant($configuration = [], $definition = []) {
        return $this->getMockBuilder('Drupal\\Core\\Display\\VariantBase')
            ->setConstructorArgs([
            $configuration,
            'test',
            $definition,
        ])
            ->onlyMethods([
            'build',
        ])
            ->getMock();
    }
    
    /**
     * Tests the label() method.
     *
     * @covers ::label
     */
    public function testLabel() {
        $display_variant = $this->setUpDisplayVariant([
            'label' => 'foo',
        ]);
        $this->assertSame('foo', $display_variant->label());
    }
    
    /**
     * Tests the label() method using a default value.
     *
     * @covers ::label
     */
    public function testLabelDefault() {
        $display_variant = $this->setUpDisplayVariant();
        $this->assertSame('', $display_variant->label());
    }
    
    /**
     * Tests the getWeight() method.
     *
     * @covers ::getWeight
     */
    public function testGetWeight() {
        $display_variant = $this->setUpDisplayVariant([
            'weight' => 5,
        ]);
        $this->assertSame(5, $display_variant->getWeight());
    }
    
    /**
     * Tests the getWeight() method using a default value.
     *
     * @covers ::getWeight
     */
    public function testGetWeightDefault() {
        $display_variant = $this->setUpDisplayVariant();
        $this->assertSame(0, $display_variant->getWeight());
    }
    
    /**
     * Tests the getConfiguration() method.
     *
     * @covers ::getConfiguration
     *
     * @dataProvider providerTestGetConfiguration
     */
    public function testGetConfiguration($configuration, $expected) {
        $display_variant = $this->setUpDisplayVariant($configuration);
        $this->assertSame($expected, $display_variant->getConfiguration());
    }
    
    /**
     * Provides test data for testGetConfiguration().
     */
    public function providerTestGetConfiguration() {
        $data = [];
        $data[] = [
            [],
            [
                'id' => 'test',
                'label' => '',
                'uuid' => '',
                'weight' => 0,
            ],
        ];
        $data[] = [
            [
                'label' => 'Test',
            ],
            [
                'id' => 'test',
                'label' => 'Test',
                'uuid' => '',
                'weight' => 0,
            ],
        ];
        $data[] = [
            [
                'id' => 'foo',
            ],
            [
                'id' => 'test',
                'label' => '',
                'uuid' => '',
                'weight' => 0,
            ],
        ];
        return $data;
    }
    
    /**
     * Tests the access() method.
     *
     * @covers ::access
     */
    public function testAccess() {
        $display_variant = $this->setUpDisplayVariant();
        $this->assertTrue($display_variant->access());
    }
    
    /**
     * Tests the submitConfigurationForm() method.
     *
     * @covers ::submitConfigurationForm
     */
    public function testSubmitConfigurationForm() {
        $display_variant = $this->setUpDisplayVariant();
        $this->assertSame('', $display_variant->label());
        $form = [];
        $label = $this->randomMachineName();
        $form_state = new FormState();
        $form_state->setValue('label', $label);
        $display_variant->submitConfigurationForm($form, $form_state);
        $this->assertSame($label, $display_variant->label());
    }

}