vendor/topthink/think-helper/tests/ArrTest.php

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<?php

namespace Tests;

use stdClass;
use think\Collection;
use think\helper\Arr;

class ArrTest extends TestCase
{
    public function testAdd()
    {
        $array = Arr::add(['name' => 'ThinkPHP'], 'price', 100);
        $this->assertSame(['name' => 'ThinkPHP', 'price' => 100], $array);
    }

    public function testCrossJoin()
    {
        // Single dimension
        $this->assertSame(
            [[1, 'a'], [1, 'b'], [1, 'c']],
            Arr::crossJoin([1], ['a', 'b', 'c'])
        );
        // Square matrix
        $this->assertSame(
            [[1, 'a'], [1, 'b'], [2, 'a'], [2, 'b']],
            Arr::crossJoin([1, 2], ['a', 'b'])
        );
        // Rectangular matrix
        $this->assertSame(
            [[1, 'a'], [1, 'b'], [1, 'c'], [2, 'a'], [2, 'b'], [2, 'c']],
            Arr::crossJoin([1, 2], ['a', 'b', 'c'])
        );
        // 3D matrix
        $this->assertSame(
            [
                [1, 'a', 'I'], [1, 'a', 'II'], [1, 'a', 'III'],
                [1, 'b', 'I'], [1, 'b', 'II'], [1, 'b', 'III'],
                [2, 'a', 'I'], [2, 'a', 'II'], [2, 'a', 'III'],
                [2, 'b', 'I'], [2, 'b', 'II'], [2, 'b', 'III'],
            ],
            Arr::crossJoin([1, 2], ['a', 'b'], ['I', 'II', 'III'])
        );
        // With 1 empty dimension
        $this->assertSame([], Arr::crossJoin([], ['a', 'b'], ['I', 'II', 'III']));
        $this->assertSame([], Arr::crossJoin([1, 2], [], ['I', 'II', 'III']));
        $this->assertSame([], Arr::crossJoin([1, 2], ['a', 'b'], []));
        // With empty arrays
        $this->assertSame([], Arr::crossJoin([], [], []));
        $this->assertSame([], Arr::crossJoin([], []));
        $this->assertSame([], Arr::crossJoin([]));
        // Not really a proper usage, still, test for preserving BC
        $this->assertSame([[]], Arr::crossJoin());
    }

    public function testDivide()
    {
        list($keys, $values) = Arr::divide(['name' => 'ThinkPHP']);
        $this->assertSame(['name'], $keys);
        $this->assertSame(['ThinkPHP'], $values);