public function testClosure()
 {
     $model = new Product();
     $model->setAttributes(['name' => '12']);
     $this->assertFalse($model->isValid());
     $this->assertTrue($model->hasErrors());
     $this->assertTrue($model->hasErrors('name'));
     $this->assertEquals(['name' => ['Minimal length < 3']], $model->getErrors());
     $this->assertEquals(['Minimal length < 3'], $model->getErrors('name'));
     $model->clearErrors('name');
     $this->assertEquals([], $model->getErrors());
 }