NullCoalesceTest.php

<?php

namespace Drupal\Tests\migrate\Unit\process;

use Drupal\migrate\MigrateException;
use Drupal\migrate\Plugin\migrate\process\NullCoalesce;

/**
 * Tests the null_coalesce process plugin.
 *
 * @group migrate
 *
 * @coversDefaultClass \Drupal\migrate\Plugin\migrate\process\NullCoalesce
 */
class NullCoalesceTest extends MigrateProcessTestCase {
    
    /**
     * Tests that an exception is thrown for a non-array value.
     *
     * @covers ::transform
     */
    public function testExceptionOnInvalidValue() {
        $this->expectException(MigrateException::class);
        (new NullCoalesce([], 'null_coalesce', []))->transform('invalid', $this->migrateExecutable, $this->row, 'destination_property');
    }
    
    /**
     * Tests null_coalesce.
     *
     * @param array $source
     *   The source value.
     * @param mixed $expected_result
     *   The expected result.
     *
     * @covers ::transform
     *
     * @dataProvider transformDataProvider
     *
     * @throws \Drupal\migrate\MigrateException
     */
    public function testTransform(array $source, $expected_result) {
        $plugin = new NullCoalesce([], 'null_coalesce', []);
        $result = $plugin->transform($source, $this->migrateExecutable, $this->row, 'destination_property');
        $this->assertSame($expected_result, $result);
    }
    
    /**
     * Provides Data for ::testTransform.
     */
    public function transformDataProvider() {
        return [
            'all null' => [
                'source' => [
                    NULL,
                    NULL,
                    NULL,
                ],
                'expected_result' => NULL,
            ],
            'false first' => [
                'source' => [
                    FALSE,
                    NULL,
                    NULL,
                ],
                'expected_result' => FALSE,
            ],
            'no null' => [
                'source' => [
                    'test',
                    'test2',
                ],
                'expected_result' => 'test',
            ],
            'string first' => [
                'source' => [
                    'test',
                    NULL,
                    'test2',
                ],
                'expected_result' => 'test',
            ],
            'empty string' => [
                'source' => [
                    NULL,
                    '',
                    NULL,
                ],
                'expected_result' => '',
            ],
            'array' => [
                'source' => [
                    NULL,
                    NULL,
                    [
                        1,
                        2,
                        3,
                    ],
                ],
                'expected_result' => [
                    1,
                    2,
                    3,
                ],
            ],
        ];
    }
    
    /**
     * Tests null_coalesce with default value.
     *
     * @covers ::transform
     */
    public function testTransformWithDefault() {
        $plugin = new NullCoalesce([
            'default_value' => 'default',
        ], 'null_coalesce', []);
        $result = $plugin->transform([
            NULL,
            NULL,
            'Test',
            'Test 2',
        ], $this->migrateExecutable, $this->row, 'destination_property');
        $this->assertSame('Test', $result);
        $this->assertSame('default', $plugin->transform([
            NULL,
            NULL,
        ], $this->migrateExecutable, $this->row, 'destination_property'));
    }

}