Bug with assertArraySubset()

[KartaviK]

Q	A
PHPUnit version	7.3.5
PHP version	7.2
Installation Method	Composer

I use Yii2 framework.
I try to assert array with rules for model but i catch an unhandled situation.
I have an abstract class and another class that extends it. I merged rules from abstract class and extended

This is how functions look like:

...
    public function rules(): array
    {
        return [
            [
                ['token', 'input',],
                'required',
            ],
            [
                ['token', 'input', 'language'],
                'string',
            ],
            ['language', 'string', 'length' => 2,],
            [
                'language',
                'default',
                'value' => function (): string {
                    return \Yii::$app->language;
                },
            ],
        ];
    }
...

...
   //
    public function rules(): array
    {
        return array_merge(parent::rules(), [
            [
                ['type', 'city',],
                'string'
            ],
            ['type', 'filter', 'filter' => 'preg_quote'],
        ]);
    }
...

And how tests look like:

...
    /** @var Model */
    protected $fakeModel;

    protected function setUp(): void
    {
        $this->fakeModel = Model::instance();
    }

    public function testRulesArray(): void
    {
        $expectRules = [
            [
                ['token', 'input',],
                'required',
            ],
            [
                ['token', 'input', 'language'],
                'string',
            ],
            ['language', 'string', 'length' => 2,],
            [
                'language',
                'default',
                'value' => function (): string {
                    return \Yii::$app->language;
                },
            ],
            [
                ['type', 'city',],
                'string'
            ],
            ['type', 'filter', 'filter' => 'preg_quote'],
        ];

        $this->assertArraySubset($expectRules, $this->fakeModel->rules());
    }
...

And finally here is exception:

Phpunit say me that asserting subset arrays is failing:

Failed asserting that an array has the subset Array &0 (
    0 => Array &1 (
        0 => Array &2 (
            0 => 'token'
            1 => 'input'
        )
        1 => 'required'
    )
    1 => Array &3 (
        0 => Array &4 (
            0 => 'token'
            1 => 'input'
            2 => 'language'
        )
        1 => 'string'
    )
    2 => Array &5 (
        0 => 'language'
        1 => 'string'
        'length' => 2
    )
    3 => Array &6 (
        0 => 'language'
        1 => 'default'
        'value' => Closure Object &00000000615f6b9e000000004dec992d (
            0 => Closure Object &00000000615f6b9e000000004dec992d
        )
    )
    4 => Array &7 (
        0 => Array &8 (
            0 => 'type'
            1 => 'city'
        )
        1 => 'string'
    )
    5 => Array &9 (
        0 => 'type'
        1 => 'filter'
        'filter' => 'preg_quote'
    )
). <Click to see difference>

But! When i click "see difference" phpstorm say that arrays is equal

excepted:

array (
  0 => 
  array (
    0 => 
    array (
      0 => 'token',
      1 => 'input',
    ),
    1 => 'required',
  ),
  1 => 
  array (
    0 => 
    array (
      0 => 'token',
      1 => 'input',
      2 => 'language',
    ),
    1 => 'string',
  ),
  2 => 
  array (
    0 => 'language',
    1 => 'string',
    'length' => 2,
  ),
  3 => 
  array (
    0 => 'language',
    1 => 'default',
    'value' => 
    Closure::__set_state(array(
    )),
  ),
  4 => 
  array (
    0 => 
    array (
      0 => 'type',
      1 => 'city',
    ),
    1 => 'string',
  ),
  5 => 
  array (
    0 => 'type',
    1 => 'filter',
    'filter' => 'preg_quote',
  ),
)

actual:

array (
  0 => 
  array (
    0 => 
    array (
      0 => 'token',
      1 => 'input',
    ),
    1 => 'required',
  ),
  1 => 
  array (
    0 => 
    array (
      0 => 'token',
      1 => 'input',
      2 => 'language',
    ),
    1 => 'string',
  ),
  2 => 
  array (
    0 => 'language',
    1 => 'string',
    'length' => 2,
  ),
  3 => 
  array (
    0 => 'language',
    1 => 'default',
    'value' => 
    Closure::__set_state(array(
    )),
  ),
  4 => 
  array (
    0 => 
    array (
      0 => 'type',
      1 => 'city',
    ),
    1 => 'string',
  ),
  5 => 
  array (
    0 => 'type',
    1 => 'filter',
    'filter' => 'preg_quote',
  ),
)

And finally, if i use assertEquals(...) test will be passed:

    public function testRulesArray(): void
    {
        $expectRules = [
            [
                ['token', 'input',],
                'required',
            ],
            [
                ['token', 'input', 'language'],
                'string',
            ],
            ['language', 'string', 'length' => 2,],
            [
                'language',
                'default',
                'value' => function (): string {
                    return \Yii::$app->language;
                },
            ],
            [
                ['type', 'city',],
                'string'
            ],
            ['type', 'filter', 'filter' => 'preg_quote'],
        ];

        $this->assertArraySubset($expectRules, $this->fakeStreetsPanel->rules());
    }

console output:

Testing started at 12:01 ...
/usr/bin/php /home/kartavik/projects/yii2-google-autocomplete/vendor/phpunit/phpunit/phpunit --configuration /home/kartavik/projects/yii2-google-autocomplete/phpunit.xml --filter "/(::testRulesArray)( .*)?$/" Wearesho\GoogleAutocomplete\Yii\Tests\Unit\Panels\StreetsPanelTest /home/kartavik/projects/yii2-google-autocomplete/tests/Unit/Panels/StreetsPanelTest.php --teamcity
PHPUnit 7.3.5 by Sebastian Bergmann and contributors.

[KartaviK]

This issue is no longer relevant