# 考虑使用Fluent API

URL: https://deploy-preview-2974--selenium-dev.netlify.app/zh-cn/documentation/test_practices/encouraged/consider_using_a_fluent_api/

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Martin Fowler创造了术语 ["Fluent API"](//www.martinfowler.com/bliki/FluentInterface.html). 
Selenium已经在其 `FluentWait` 类中实现了类似的东西, 这是对标准 <code>Wait</code> 类的替代. 
您可以在页面对象中启用Fluent API设计模式, 然后使用如下代码段查询Google搜索页面:

```java
driver.get("http://www.google.com/webhp?hl=en&tab=ww");
GoogleSearchPage gsp = new GoogleSearchPage(driver);
gsp.setSearchString("cheese").clickSearchButton();
```

Google页面对象类具有这种流畅行为后可能看起来像这样:

```java
abstract class BasePage {
  protected WebDriver driver;

  public BasePage(WebDriver driver) {
    this.driver = driver;
  }
}

class GoogleSearchPage extends BasePage {
  public GoogleSearchPage(WebDriver driver) {
    super(driver);
    // Generally do not assert within pages or components.
    // Effectively throws an exception if the lambda condition is not met.
    new WebDriverWait(driver, Duration.ofSeconds(3)).until(d -> d.findElement(By.id("logo")));
  }

  public GoogleSearchPage setSearchString(String sstr) {
    driver.findElement(By.id("gbqfq")).sendKeys(sstr);
    return this;
  }

  public void clickSearchButton() {
    driver.findElement(By.id("gbqfb")).click();
  }
}
```