main方法的测试

首先main方法测试的主要原理参见下面的链接

http://www.cnblogs.com/ITEagle/archive/2010/07/10/1774888.html

1、callMainFailure

    

代码

   
     

    
      
    
      /**
    
      
 * <p>
 * Tests the main method. <code>System.exit</code> is expected.
 * </p>
 *
 * 
    
      @param
    
       args
 * the arguments.
 
    
      */
    
      
 
    
      private
    
       
    
      static
    
       
    
      void
    
       callMainFailure(String[] args) {
 
    
      try
    
       {
 PriceConversionUtility.main(args);

 fail(
    
      "
    
      System.exit is expected.
    
      "
    
      );
 } 
    
      catch
    
       (SecurityException e) {
 
    
      //
    
       Good
    
      

    
       }
 }
   
     

不论main方法正常结束还是异常结束都要System.exit因此这个函数在准确性测试和异常测试中都可以用的到

2、MockSecurityManager

    一个测试的帮助类

   

代码

   
     

    
      
    
      import
    
       java.security.Permission;


    
      public
    
       
    
      final
    
       
    
      class
    
       MockSecurityManager 
    
      extends
    
       SecurityManager {
 
    
      /**
    
      
 * <p>
 * This method throws exception for testing if the status is 1 or 0.
 * </p>
 * 
 * 
    
      @param
    
       status
 * The exit status code.
 * 
 * 
    
      @throws
    
       SecurityException
 * Always.
 
    
      */
    
      
 
    
      public
    
       
    
      void
    
       checkExit(
    
      int
    
       status) {
 
    
      super
    
      .checkExit(status);
 
    
      if
    
       (status 
    
      ==
    
       
    
      1
    
       
    
      ||
    
       status 
    
      ==
    
       
    
      0
    
       
    
      ||
    
       status 
    
      ==
    
       
    
      -
    
      1
    
      ) {
 
    
      throw
    
       
    
      new
    
       SecurityException(
    
      "
    
      Halt for testing.
    
      "
    
      );
 }
 }

 
    
      /**
    
      
 * <p>
 * This method does nothing.
 * </p>
 * 
 * 
    
      @param
    
       perm
 * Ignored.
 
    
      */
    
      
 
    
      public
    
       
    
      void
    
       checkPermission(Permission perm) {
 }
}