How to Write JUnit Test Cases for Post API in Spring Boot
Writing JUnit test cases for a Post API in Spring Boot is an important part of ensuring that your application is functioning correctly. By writing tests, you can ensure that the API is working as expected and that any changes made to the code do not break existing functionality. In this article, we will discuss how to write JUnit test cases for a Post API in Spring Boot.
Step 1: Create a MockMvc Object
The first step in writing JUnit test cases for a Post API in Spring Boot is to create a MockMvc object. This object will be used to simulate HTTP requests and responses. To create the MockMvc object, you will need to use the @AutoConfigureMockMvc annotation on your test class. This annotation will automatically configure the MockMvc object with the necessary configuration.
Step 2: Create a RequestBuilder Object
The next step is to create a RequestBuilder object. This object will be used to construct an HTTP request that can be sent to the Post API. The RequestBuilder class provides several methods that can be used to construct an HTTP request such as setMethod(), setUri(), and addHeader(). Once you have constructed the request, you can then use the MockMvc object created in Step 1 to send it.
Step 3: Create an Assertion
Once you have sent the request, you will need to create an assertion that verifies that the response from the Post API is correct. You can use the assertThat() method provided by JUnit to verify that the response contains the expected data. For example, if you are expecting a certain status code or response body, you can use assertThat() to verify that they match what was expected.
Step 4: Run Your Test Case
Finally, once you have written your test case, you can run it using JUnit. If all of your assertions pass, then your test case has been successful and your Post API is functioning correctly.