atk4\data\tests\PersistentArrayTest::testSaveAndUnload PHP Method

    public function testSaveAndUnload()
    {
        $a = ['user' => [1 => ['name' => 'John', 'surname' => 'Smith', 'gender' => 'M'], 2 => ['name' => 'Sarah', 'surname' => 'Jones', 'gender' => 'F']]];
        $p = new Persistence_Array($a);
        $m = new Model_Male($p, 'user');
        $m->load(1);
        $this->assertTrue($m->loaded());
        $m['gender'] = 'F';
        $m->saveAndUnload();
        $this->assertFalse($m->loaded());
        $m = new Model_Female($p, 'user');
        $m->load(1);
        $this->assertTrue($m->loaded());
        $this->assertEquals(['user' => [1 => ['name' => 'John', 'surname' => 'Smith', 'gender' => 'F'], 2 => ['name' => 'Sarah', 'surname' => 'Jones', 'gender' => 'F']]], $a);
    }