use Narrowspark\TestingHelper\Traits\AssertArrayTrait;

class ModelTest extends \PHPUnit_Framework_TestCase
{
    use AssertArrayTrait;

    // Now you can do something like this.
    public function testIfArrayContainIrix()
    {
        $haystack = ['Mac', 'NT', 'Irix', 'Linux'];

        self::assertInArray('Irix', $haystack);
    }

    // or
    public function testAssertArraySubsetThrowsExceptionForInvalidSubset(): void
    {
        $this->expectException(ExpectationFailedException::class);

        $this->assertArraySubset([6, 7], [1, 2, 3, 4, 5, 6]);
    }
}