需要一些幫助來理解這個Selenium測試腳本示例

Question

我在回顧這個例子並試圖理解它是如何工作的。該示例取自http://www.tutorialspoint.com/selenium/selenium_page_object_model.htm。

第一步：

package PageObject; 

import org.openqa.selenium.*; 

public class PageObjectsPercCalc 
{ 
    private static WebElement element = null; 

    // Math Calc Link 
    public static webElement lnk_math_calc(WebDriver driver) 
    { 
     element = driver.findElement(By.xpath(".//*[@id='menu']/div[3]/a")); 
     return element; 
    } 

    //Percentage Calc Link 
    public static webElement lnk_percent_calc(WebDriver driver) 
    { 
     element = driver.findElement(By.xpath(".//*@id='menu']/div[4]/div[3]/a")); 
     return element; 
    } 

    //Number 1 Text Box 
    public static webElement txt_num_1(WebDriver driver) 
    { 
     element = driver.findElement(By.id("cpar1")); 
     return element; 
    } 

    //Number 2 Text Box 
    public static webElement txt_num_2(WebDriver driver) 
    { 
     element = driver.findElement(By.id("cpar2")); 
     return element; 
    } 

    //Calculate Button 
    public static webElement btn_calc(WebDriver driver) 
    { 
     element = driver.findElement(By.xpath(".//*[@id='content']/table/tbody/tr/td[2]/input")); 
     return element; 
    }  

    // Result  
    public static webElement web_result(WebDriver driver) 
    { 
     element = driver.findElement(By.xpath(".//*[@id='content']/p[2]/span/font/b")); 
     return element; 
    }  
} 

第2步：使用對象庫上面創建以下測試：

package PageObject; 

import java.util.concurrent.TimeUnit; 

import org.openqa.selenium.WebDriver; 
import org.openqa.selenium.firefox.FirefoxDriver; 

public class PercentCalculator { 

    private static WebDriver driver = null; 

    public static void main(String[] args) { 

     driver = new FirefoxDriver(); 
     driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS); 
     driver.get("http://www.calculator.net"); 

     //Use page Object library now 
     page_objects_perc_calc.lnk_math_calc(driver).click();  
     page_objects_perc_calc.lnk_percent_calc(driver).click(); 

     page_objects_perc_calc.txt_num_1(driver).clear(); 
     page_objects_perc_calc.txt_num_1(driver).sendKeys("10");  

     page_objects_perc_calc.txt_num_2(driver).clear(); 
     page_objects_perc_calc.txt_num_2(driver).sendKeys("50"); 

     page_objects_perc_calc.btn_calc(driver).click(); 
     String result = page_objects_perc_calc.web_result(driver).getText(); 

     if(result.equals("5")){  
     System.out.println(" The Result is Pass"); 
     } 
     else { 
     System.out.println(" The Result is Fail"); 

     } 
     driver.close(); 
     } 
    } 

現在我的問題是如何「page_objects_perc_calc」對象調用庫方法沒有宣佈它作爲第二步中的PageObjectsPercCalc？現在，如果我把它聲明如下：

PageObjectsPercCalc page_objects_perc_calc = new PageObjectsPercCalc(); 

我得到這樣的警告

「從類型 PageObjectsPercCalc應以靜態的方式來訪問靜態方法lnk_math_calc（webdriver的）」;

這是正確的，但我不知道如何定義PageObjectsPercCalc對象爲靜態。請幫忙。

謝謝。

Answer 1

可以直接在類上調用靜態方法，而無需實例化類的對象。

PageObjectsPercCalc.lnk_math_calc(driver).click();