Selenium webDriver操作，无需调用build（）

Question

没有build（）的动作：

Actions actions = new Actions(driver);
actions.doubleClick(element).perform();

这似乎很好用，而无需在perform（）之前调用build（）。有什么区别？

Answer 1

从Java绑定中的源代码中，build()和perform()的定义很简单：

/**
   * Generates a composite action containing all actions so far, ready to be performed (and
   * resets the internal builder state, so subsequent calls to {@link #build()} will contain fresh
   * sequences).
   *
   * @return the composite action
   */
  public Action build() {
    Action toReturn = new BuiltAction(driver, new LinkedHashMap<>(sequences), action);
    action = new CompositeAction();
    sequences.clear();
    return toReturn;
  }

  /**
   * A convenience method for performing the actions without calling build() first.
   */
  public void perform() {
    build().perform();
  }

显然，只需执行简单的调用构建，因此使用perform()或build().perform()之间没有功能上的区别