loadrunner字符串处理函数

最新推荐文章于 2022-04-14 21:21:53 发布

转载最新推荐文章于 2022-04-14 21:21:53 发布 · 2.1k 阅读

文章标签：

#loadrunner #string #action #search #output #buffer

LoadRunner 专栏收录该内容

41 篇文章

订阅专栏

本文介绍LoadRunner中的字符串处理函数，包括lr_save_datetime、lr_save_int等，并通过实例演示如何使用这些函数来保存和检索字符串数据。

在Loadrunner中提供了C对字符串出了的相关功能函数，如下：

lr_save_datetime	把当前日期和时间保存到一个参数中
lr_save_int	把一个整数保存为参数
lr_save_searched_string	保存一个字符数组相对于字符串出现的部分。
lr_save_string	把一个字符串保存到参数中
lr_save_var	把字符串的一部分内容保存为参数
lr_eval_string	返回参数的实际内容或返回一个包含参数的字符串的实际内容

下面我们将对这些函数作一一说明，并举例实践。

void lr_save_datetime(const char *format, int offset, const char *name);

参数解释：

format	所检索的日期/时间信息的格式
offset	当前日期和时间的偏移量, 采用形式有: DATE_NOW, TIME_NOW, ONE_DAY, ONE_HOUR, ONE_MIN. 例如： TIME_NOW + ONE_HOUR
name	保存的参数名称，用来存储日期/时间信息。

例子：

  
   Action()
{
    lr_save_datetime(
   "
   Tomorrow is %B %d %Y
   "
   , DATE_NOW 
   +
    ONE_DAY, 
   "
   next
   "
   ); 

    lr_output_message(lr_eval_string(
   "
   {next}
   "
   )); 

    
   return
    
   0
   ;
}

运行结果为：

Running Vuser...
Starting iteration 1.
Starting action Action.
Action.c(5): Tomorrow is 七月 06 2011
Ending action Action.
Ending iteration 1.
Ending Vuser...

int lr_save_int ( int value, const char *param_name);

参数解释：

value	将要保存到参数得整数值
param_name	保存的参数名称

例子：

  
   Action()
{
    
   int
    num;
    num 
   =
    
   5
   ;
    lr_save_int(num 
   *
    
   2
   , 
   "
   param1
   "
   ); 
    lr_output_message(lr_eval_string(
   "
   {param1}
   "
   )); 
    
   return
    
   0
   ;
}

运行结果为：

Running Vuser...
Starting iteration 1.
Starting action Action.
Action.c(6): 10
Ending action Action.
Ending iteration 1.
Ending Vuser...

int lr_save_searched_string (const char *buffer, long buf_size, unsigned int occurrence, const char *search_string, int offset, unsigned int string_len, const char *parm_name );

参数解释：

buffer	The STRING or CARRAY buffer, part of whose contents you want to save.
buf_size	The buffer size.
occurrence	The occurrence number of the search_string (0-based count). For example, if the search_string occurs three times, and you want the second occurrence, set occurrence to 1.
search_string	The string to search for in the buffer.
offset	The number of characters to skip after the end of the search string occurrence.
string_len	The number of characters to save.
parm_name	Parameter name to be used in subsequent lr statements to refer to the saved information. Name is enclosed in double-quotes.

例子：

  
   Action()
{
    
   char
    cBuff[] 
   =
    
   "
   abc Emma Woodhouse abc Elizabeth Bennet abc William Price
   "
   ;
    lr_save_searched_string(cBuff, strlen(cBuff),
                            
   2
   , 
   "
   abc
   "
   , 
   //
    Search for third occurrence of "abc"
   

                               
   1
   ,        
   //
    Skip the space after "abc" 
   

                               
   4
   ,           
   //
    Put the next four characters... 
   

                               
   "
   Fannys_brother
   "
   ); 
   //
    ... in parameter Fannys_brother. 
   

       lr_output_message(
   "
   %s
   "
   ,lr_eval_string(
   "
   Fannys_brother={Fannys_brother}
   "
   ));

    
   return
    
   0
   ;
}

运行结果为：

Running Vuser...
Starting iteration 1.
Starting action Action.
Action.c(9): Fannys_brother=Will
Ending action Action.
Ending iteration 1.
Ending Vuser...

int lr_save_string (const char *param_value, const char *param_name);

int lr_save_var (const char *param_value, unsigned long const value_len, unsigned long const options, const char *param_name);

char *lr_eval_string (const char *instring );

以上三个函数我们经常会用在一起。例如：

例子：

  
   Action() 

{
    lr_save_string(
   "
   testaaaab
   "
   , 
   "
   InName
   "
   );
    lr_output_message(
   "
   %d
   "
   ,strlen(
   "
   {InName}
   "
   ));
    lr_output_message(
   "
   %d
   "
   ,strlen(
   "
   {InName}
   "
   )
   -
   1
   );
    lr_save_var( lr_eval_string(
   "
   {InName}
   "
   ),
                 strlen(
   "
   {InName}
   "
   )
   -
   1
   , 
   0
   , 
   "
   ShortName
   "
   );
    lr_output_message(
   "
   %s
   "
   ,lr_eval_string(
   "
   ShortName={ShortName}
   "
   ));
    lr_output_message(
   "
   ShortName=%s
   "
   ,lr_eval_string(
   "
   {ShortName}
   "
   ));

    
   return
    
   0
   ; 

}

Starting iteration 1.
Starting action Action.
Action.c(5): 8
Action.c(6): 7
Action.c(9): ShortName=testaaa
Action.c(10): ShortName=testaaa
Ending action Action.
Ending iteration 1.

*****注：在loadrunner中，字符串处理函数用的比较多，其用法也比较简单。多加以练习操作，在项目实践中可以很快的做到得心应手。*****