function NestedArrayTest::testMergeImplicitKeys

Tests that arrays with implicit keys are appended, not merged.

@covers ::mergeDeepArray

File

core/tests/Drupal/Tests/Component/Utility/NestedArrayTest.php, line 179

Class

NestedArrayTest

@coversDefaultClass \Drupal\Component\Utility\NestedArray @group Utility

Namespace

Code

public function testMergeImplicitKeys() : void {
    $a = [
        'subkey' => [
            'X',
            'Y',
        ],
    ];
    $b = [
        'subkey' => [
            'X',
        ],
    ];
    // Drupal core behavior.
    $expected = [
        'subkey' => [
            'X',
            'Y',
            'X',
        ],
    ];
    $actual = NestedArray::mergeDeepArray([
        $a,
        $b,
    ]);
    $this->assertSame($expected, $actual, 'drupal_array_merge_deep() creates new numeric keys in the implicit sequence.');
}