Understanding Restassured BDD Method- Given, When,Then

Given

Sets up the preconditions for the request — base URI, headers, query parameters, or request body.

When

Specifies the actual action to perform — the HTTP method and endpoint, such as .get("/users") or .post("/login").

Then

Defines the expected outcome — assertions on status code, headers, or response body content.

given().header("Content-Type", "application/json")
.when().post("/login")
.then().statusCode(200).body("token", notNullValue());