12.3 Testing reactive controllers

When it comes to testing reactive controllers, Spring hasn’t left us in the lurch. Indeed, Spring has introduced WebTestClient, a new test utility that makes it easy to write tests for reactive controllers written with Spring WebFlux. To see how to write tests with WebTestClient, let’s start by using it to test the recentTacos() method from the TacoController that you wrote in section 12.1.2.