atk4\data\tests\FieldTest::testEnum2 PHP Method

    public function testEnum2()
    {
        $m = new Model();
        $m->addField('foo', ['enum' => [1, 'bar']]);
        $m['foo'] = 1;
        $this->assertSame(1, $m['foo']);
        $m['foo'] = 'bar';
        $this->assertSame('bar', $m['foo']);
    }