API Automation

Dependencies used:

RestAssured api - for invoking webservices and validate responses

Apachi POI api - for data driven testing

Json simple api - for parsing the json responses

TestNG - to execute tests

To invoke a REST service with Java:

1. Set the baseURI property of the RESTASSURED static class
   Example:
   RestAssured.baseURI = "http://restapi.demoqa.com/utilities/weather/city";
2. Create the RequestSpecification object and assign it with RestAssured.Given() method.
   Example:
   RequestSpecification httpRequest = ResetAssured.Given();
3. Create the Response object and assign it with requestSpecificationObject.request() method
   Example:
   Response response = httpRequest.Request(METHOD.GET, "/Hyderabad");
   Note: "/Hyderabad" is the parameter passed in GET request
4. The Response of the request invoked can be accessed using the response object
   Example:
   System.out.println(response.getResponseBody());

Notes:

For POST requests, we need to add the payload and header as below:

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JSONObject requestPayload = new JSONObject();
requestPayload.put("FirstName", firstName);
requestPayload.put("LastName", lastName);
requestPayload.put("UserName", userName);
requestPayload.put("Password", password);
requestPayload.put("Email", emailId);

httpRequest.header("Content-Type", "application/json");
httpRequest.body(requestPayload.toJSONString());

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