This article expains about how to test API’s using web_rest
function and also how to modify JSON resonses
1. Web_rest()
function will be used for creating GET/POST/DELETE/PUT/etc… , so insert this
function and add end points including headers and body
Example:
web_rest("OneEmployeeDetails",
"URL=http://dummy.restapiexample.com/api/v1/employee/1",
"Method=GET",
"Snapshot=t20084.inf",
LAST);
"URL=http://dummy.restapiexample.com/api/v1/employee/1",
"Method=GET",
"Snapshot=t20084.inf",
LAST);
2. Get
the response from the result of web_rest and play with response based on your
needs , some of the useful examples are given below
3. Before
checking the scripts , few online tools needed to making JSON path and also beatification
http://jsonpathfinder.com/ -- This helps to make JSON path , which can
be used directly in QueryString in lr_json_XXXX functions.
https://jsonpath.com/ -- This helps to check the json expression is
correctly retrieving the outputs so that that expression can be used in functions
Action()
{
// This script helps for handling JSON data in HP Load runner
// Get, Insert, delete , Post , etc ...
// Web_rest is the function we use for testing REST API's / Micro services / web services
// Example1:
int i=0;
web_reg_save_param_ex(
"ParamName=Output",
"LB=",
"RB=",
SEARCH_FILTERS,
"Scope=Body",
LAST);
web_rest("OneEmployeeDetails",
"URL=http://dummy.restapiexample.com/api/v1/employee/1",
"Method=GET",
"Snapshot=t20084.inf",
LAST);
lr_eval_json ("Buffer={Output}", "JsonObject=JSON_Param");
//indented
lr_json_stringify("JsonObject=JSON_Param","Format=indented","OutputParam=Result",LAST );
lr_output_message("Indented JSON is : %s", lr_eval_string("{Result}"));
//lr_output_message("OUTPUT is::::: %s",lr_eval_string("{Output}"));
// Load JSON
lr_eval_json("Buffer={Output}","JsonObject=json_obj",LAST);
// Get values from the json
lr_json_get_values("JsonObject=json_obj",
"ValueParam=sal_BeforeUpdate",
"QueryString=$.employee_salary",
//"SelectAll=Yes",
LAST);
lr_json_stringify("JsonObject=json_obj","Format=indented","OutputParam=Result",LAST );
lr_output_message("Indented JSON is : %s", lr_eval_string("{Result}"));
// Print the output of QueryString
//lr_output_message("Employee Sal :::: %s",lr_eval_string("{sal_BeforeUpdate}"));
lr_save_string("\"isbn\": \"0-048-08048-9\"", "i_new_isbn");
lr_eval_json("Buffer={i_new_isbn}",
"JsonObject=i_json_obj2", LAST);
i = lr_json_insert("JsonObject=json_obj",
"JsonNode=i_json_obj2",
"QueryString=$.*",
LAST);
// Json Insert Operation
// // 1 match
// i = lr_json_insert("JsonObject=json_obj",
// "Value=",
// "QueryString=$.",
// LAST);
if (i != 1)
lr_error_message("lr_json_insert should return %d, but returns %d", 1, i);
else
lr_error_message("lr_json_insert should return %d, it returns correctly %d", 1, i);
lr_json_get_values("JsonObject=json_obj",
"ValueParam=store_val_afterJAYA",
"QueryString=$.*",
//"SelectAll=Yes",
LAST);
lr_output_message("Store List After Jaya krishna insert:::: %s",lr_eval_string("{store_val_afterJAYA}"));
Example2:
int i=0,a=0;
char* json_input = "{\n \"store\": {\n \"book\": [\n {\n \"category\": \"reference\",\n \"author\": \"Nigel Rees\",\n \"title\": \"Sayings of the Century\",\n \"price\": 8.95\n },\n {\n \"category\": \"fiction\",\n \"author\": \"Evelyn Waugh\",\n \"title\": \"Sword of Honour\",\n \"price\": 12.99\n },\n {\n \"category\": \"fiction\",\n \"author\": \"Herman Melville\",\n \"title\": \"Moby **bleep**\",\n \"isbn\": \"0-553-21311-3\",\n \"price\": 8.99\n },\n {\n \"category\": \"fiction\",\n \"author\": \"J. R. R. Tolkien\",\n \"title\": \"The Lord of the Rings\",\n \"isbn\": \"0-395-19395-8\",\n \"price\": 22.99\n }\n ],\n \"bicycle\": {\n \"color\": \"red\",\n \"price\": 19.95\n }\n }\n}";
//char* json_output;
lr_save_string(json_input, "JSON_Input_Param");
lr_output_message("some text is: %s",json_input);
// Load JSON
lr_eval_json("Buffer={JSON_Input_Param}","JsonObject=json_obj",LAST);
lr_json_get_values("JsonObject=json_obj",
"ValueParam=store_val_Before",
"QueryString=$.store",
//"SelectAll=Yes",
LAST);
lr_output_message("Store List Before:::: %s",lr_eval_string("{store_val_Before}"));
// Save result in parameter "title"
lr_json_get_values("JsonObject=json_obj",
"ValueParam=title_val",
"QueryString=$.store.book[0].title",
//"SelectAll=Yes",
LAST);
// lr_save_string(json_output, "title_val");
lr_output_message("Output of JsonExperssions %s",lr_eval_string("{title_val}"));
lr_json_delete("JsonObject=json_obj",
"QueryString=$.store.bicycle",
LAST);
lr_json_get_values("JsonObject=json_obj",
"ValueParam=store_val_after",
"QueryString=$.store",
//"SelectAll=Yes",
LAST);
lr_output_message("Store List After:::: %s",lr_eval_string("{store_val_after}"));
// 1 match
i = lr_json_insert("JsonObject=json_obj",
"Value={\"owner\":\"Mr Black\"}",
"QueryString=$.store",
LAST);
if (i != 1)
lr_error_message("lr_json_insert should return %d, but returns %d", 1, i);
else
lr_error_message("lr_json_insert should return %d, it returns correctly %d", 1, i);
lr_json_get_values("JsonObject=json_obj",
"ValueParam=store_val_afterJAYA",
"QueryString=$.store",
//"SelectAll=Yes",
LAST);
lr_output_message("Store List After Jaya krishna insert:::: %s",lr_eval_string("{store_val_afterJAYA}"));
// 2 match with ValueParam and SelectAll=Yes
lr_save_string("{\"discount\":\"20 percent\"}", "i_new_discount");
a = lr_json_insert("JsonObject=json_obj",
"ValueParam=i_new_discount",
"QueryString=$.store.book[?(@.price > 10)]",
"SelectAll=Yes",
LAST);
lr_json_get_values("JsonObject=json_obj",
"ValueParam=store_val_afterJAYA1",
"QueryString=$.store",
//"SelectAll=Yes",
LAST);
lr_output_message("Store List After Jaya krishna insert:::: %s",lr_eval_string("{store_val_afterJAYA1}"));
return 0;
}
