Get & Assert Response Time Of Request using ResponseOptions

When a request is sent to a server, it responds with a response. The amount of time taken between sending a request to server and retrieving a response back form a server is called Response Time. An API must be faster. As a part of API testing, we must check the response time as well.

• If you just want to retrieve response time in milliseconds or other time units, you need to use time(), getTime(), timeIn(TimeUnit timeunit), getTimeIn( TimeUnit timeunit ) from Response interface. Response interface inherits these methods from ResponseOptions. You can not use Matchers in above methods.
• If you want to use Matchers i.e. assertion like response time is greater than a specific value, you need to use overloaded time() methods from ValidatableResponse which inherits time() method from ValidatableResponseOptions interface.

Interface ResponseOptions contains four methods :-

• getTime() – The response time in milliseconds (or -1 if no response time could be measured)
• getTimeIn(TimeUnit timeunit) – The response time in the given time unit (or -1 if no response time could be measured)
• time() – The response time in milliseconds (or -1 if no response time could be measured)
• timeIn( TimeUnit timeunit ) – The response time in the given time unit (or -1 if no response time could be measured)

// Create a request specification 
		RequestSpecification request= RestAssured.given();
		
		// Setting content type to specify format in which request payload will be sent.
		// ContentType is an ENUM. 
		request.contentType(ContentType.JSON);
		//Adding URI
		request.baseUri("https://hireqa.co.in/register");
		// Adding body as string
		request.body(jsonString);
		
		// Calling POST method on URI. After hitting we get Response
		Response response = request.post();
		
		// By default response time is given in milliseconds
		long responseTime1 = response.getTime();
		System.out.println("Response time in ms using getTime():"+responseTime1);
		
		// we can get response time in other format as well
		long responseTimeInSeconds = response.getTimeIn(TimeUnit.SECONDS);
		System.out.println("Response time in seconds using getTimeIn():"+responseTimeInSeconds);

                // Similar methods 
		long responseTime2 = response.time();
		System.out.println("Response time in ms using time():"+responseTime2);
		
		long responseTimeInSeconds1 = response.timeIn(TimeUnit.SECONDS);
		System.out.println("Response time in seconds using timeIn():"+responseTimeInSecon