引用链接:http://watirmelon.com/2011/01/24/composition-or-inheritance-for-delegating-page-methods/ Composition or inheritance for delegating page methods? Posted on January 24, 2011 The thing I like to do when creating a page object pattern for automated…

https://stackoverflow.com/questions/49002/prefer-composition-over-inheritance 解答1 Prefer composition over inheritance as it is more malleable / easy to modify later, but do not use a compose-always approach. With composition, it's easy to change beha…

Inheritance disadvantage Unlike method invocation, inheritance violates encapsulation. Since you don't know the super class implementation which may involve some unpredictable calling between different methods of super class. And it is difficult to m…

React的组合   composition: props有个特殊属性,children,组件可以通过props.children拿到所有包含在内的子元素, 当组件内有子元素时,组件属性上的children属性不生效,当组件无子元素时,属性中的children生效 function FancyBorder(props) { return ( <div className={'FancyBorder FancyBorder-' + props.color}> {props.children} &…

  I have a general test class in my nosetests suit and some sub-classes, inheriting from it. The config is likewise: class CGeneral_Test(object):: """This class defines the general testcase""" def __init__ (self): do_some_ini…

Page Object Model (POM) & Page Factory in Selenium: Ultimate Guide 来源:http://www.guru99.com/page-object-model-pom-page-factory-in-selenium-ultimate-guide.html   Before we learn about Page Object Model, lets understand - Why POM ? Starting a UI Automa…

<Item 36> Never redefine an inherited non-virtual function 1.如下代码通过不同指针调用同一个对象的同一个函数会产生不同的行为The reason for this two-faced behavior is that non-virtual functions like B::mf and D::mf are statically bound (see Item 37). That means that because pB is d…

Visual inheritance http://devnet.kentico.com/docs/7_0/devguide/index.html?visual_inheritance.htm The content of sub-pages is displayed using Page placeholder web parts. The result of this approach is that the sub-page content is "nested" inside…

Containers in Depth Full container taxonomy You can usually ignore any class that begins with "Abstract." Filling containers This fill( ) just duplicates a single object reference throughout the container. In addition, it only works for List obj…

我之前已经介绍过关于构建者模式(Builder Pattern)的一些内容,它是一种很有用的模式用于实例化包含几个属性(可选的)的类,带来的好处是更容易读.写及维护客户端代码.今天,我将继续介绍对象创建技术. 在我看来,下面这个类是非常有用的例子.有一个RandomIntGenerator 类,产生随机的int类型的整数.如下所示: public class RandomIntGenerator { private final int min; private final int max; pu…