JUnit測試這個特定的方法

我想爲一個Java方法編寫一些JUnit測試，它接受一個基本的URL和目標URL，並返回相對於給定的基本URL的目標URL。JUnit測試這個特定的方法

我正在使用基於分類的分區來做我的測試集。目前我正在測試檢查以下內容：

檢查兩個輸入的URL是否有相同的協議和主機;
檢查路徑不一致時相對URL調整正確;
檢查基址爲的URL何時比目標URL更長;
檢查目標網址的長度是否比基準網址長 ;
檢查當基準URL和目標URL是相同;

我想知道其他人如何使用JUnit測試此方法？我是否缺少任何標準？

/** 
* This method converts an absolute url to an url relative to a given base-url. 
* The algorithm is somewhat chaotic, but it works (Maybe rewrite it). 
* Be careful, the method is ".mm"-specific. Something like this should be included 
* in the librarys, but I couldn't find it. You can create a new absolute url with 
* "new URL(URL context, URL relative)". 
*/ 
public static String toRelativeURL(URL base, URL target) { 
     // Precondition: If URL is a path to folder, then it must end with '/' character. 
    if((base.getProtocol().equals(target.getProtocol())) && 
     (base.getHost().equals(target.getHost()))) { 

     String baseString = base.getFile(); 
     String targetString = target.getFile(); 
     String result = ""; 

     //remove filename from URL 
     baseString = baseString.substring(0, baseString.lastIndexOf("/")+1); 

     //remove filename from URL 
     targetString = targetString.substring(0, targetString.lastIndexOf("/")+1); 

     StringTokenizer baseTokens = new StringTokenizer(baseString,"/");//Maybe this causes problems under windows 
     StringTokenizer targetTokens = new StringTokenizer(targetString,"/");//Maybe this causes problems under windows 
     String nextBaseToken = "", nextTargetToken = ""; 

     //Algorithm 

     while(baseTokens.hasMoreTokens() && targetTokens.hasMoreTokens()) { 
     nextBaseToken = baseTokens.nextToken(); 
     nextTargetToken = targetTokens.nextToken(); 
     System.out.println("while1"); 
     if (!(nextBaseToken.equals(nextTargetToken))) { 
      System.out.println("if1"); 
      while(true) { 
      result = result.concat("../"); 
      System.out.println(result); 
      if (!baseTokens.hasMoreTokens()) { 
       System.out.println("break1"); 
       break; 
      } 
      System.out.println("break2"); 
      nextBaseToken = baseTokens.nextToken(); 
      } 
      while(true) { 
      result = result.concat(nextTargetToken+"/"); 
      System.out.println(result); 
      if (!targetTokens.hasMoreTokens()) { 
       System.out.println("break3"); 
       break; 
      } 
      System.out.println("break4"); 
      nextTargetToken = targetTokens.nextToken(); 
      } 
      String temp = target.getFile(); 
      result = result.concat(temp.substring(temp.lastIndexOf("/")+1,temp.length())); 
      System.out.println("1"); 
      return result; 
     } 
     } 

     while(baseTokens.hasMoreTokens()) { 
     result = result.concat("../"); 
     baseTokens.nextToken(); 
     } 

     while(targetTokens.hasMoreTokens()) { 
     nextTargetToken = targetTokens.nextToken(); 
     result = result.concat(nextTargetToken + "/"); 
     } 

     String temp = target.getFile(); 
     result = result.concat(temp.substring(temp.lastIndexOf("/")+1,temp.length())); 
     System.out.println("2"); 
     return result; 
    } 
    System.out.println("3"); 
    return target.toString(); 
    } 
}

來源

2011-02-14 Chris Brown

有些事情要試用..現在你知道如何去做。嘗試使用TDD再次寫入方法並重新編寫方法 - 這樣您就不會有未被單元測試覆蓋的代碼了。此外，您可能會提出一個更好的設計，因爲這是爲了第二次）。 – Gishu 2011-02-14 02:35:21

我覺得你的編輯出了問題;）。 – fwielstra 2011-02-14 11:31:11

只是一些想法...

您可能希望測試如果（或兩者）您的網址輸入爲空。 :)
如果目標URL有參數（例如：http://host/app/bla?param1=value&param2=value），生成的相對URL是否包含參數？
如果目標網址只是http://host，它是否會導致IndexOutOfBoundException在targetString.lastIndexOf("/") ......這同樣適用於基本URL。

來源

2011-02-14 01:40:32 limc

JUnit測試這個特定的方法

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