Скачать или смотреть How to Validate Response Status using Rest Assured

@Test
public void validateResponseStatus() {

RestAssured.baseURI = "http://api.weatherapi.com";

RequestSpecification httpResponse = RestAssured.given();

Response response = httpResponse.request(Method.GET,"/v1/current.json?key=6483ec3700b74ecf81585748202811&q=London");

int statusCode = response.getStatusCode();

Assert.assertEquals(statusCode,200, "Correct status code");
}

@Test
public void validateResponseStatus1() {

RestAssured.baseURI = "http://api.weatherapi.com";

RequestSpecification httpResponse = RestAssured.given();

Response response = httpResponse.request(Method.GET,"/v1/current.json?key=6483ec3700b74ecf81585748202811&q=1");

int statusCode = response.getStatusCode();

Assert.assertEquals(statusCode,400, "Correct status code");
}


@Test
public void validateResponseStatus2() {

RestAssured.baseURI = "http://api.weatherapi.com";

RequestSpecification httpResponse = RestAssured.given();

Response response = httpResponse.request(Method.GET,"/v1/current.json?key=6483ec3700b74ecf81585748202811&q=London");

String statusCode = response.getStatusLine();

Assert.assertEquals(statusCode,"HTTP/1.1 200 OK", "Correct status code");
}