Any guidelines to write JUnit for path based sling servlets with POST method?

[hrai]

hello expert,

Could you please share any sample or guide which outlines how to write JUnit test case for following:

- a path based sling servlet

- which takes 2 input parameter an xml file and an xdp template

- using OutputService one can generate the PDF

- JUnit config and how to write the test case?

thanks. 

[Pulkit_Jain_]

@hrai 

Don't have a reference implementation for this use case, but you can refer to this help doc https://experienceleague.adobe.com/docs/experience-manager-learn/getting-started-wknd-tutorial-devel... 

[Mayank_Gandhi]

@hrai replied to you other post.

Mock it like any aem servlet nothing special in this case. 

https://taylor.callsen.me/unit-testing-aem-sling-models-and-servlets/

https://sourcedcode.com/blog/aem/aem-sling-servlet-osgi-r7-by-resource-type-unit-test-junit-4-with-e...

[keehwan1 · Accepted solution]

Here are some general guidelines for writing JUnit tests for path-based Sling Servlets with a POST method:

1. Set up the Servlet: Create a Sling Servlet and annotate it with the @SlingServlet annotation. The paths property in the annotation should specify the URL patterns that will trigger the servlet. The methods property should be set to "POST" to indicate that the servlet only accepts POST requests.

2. Create the JUnit Test Class: Create a JUnit test class and annotate it with @RunWith(SlingContextTest.class). The SlingContextTest class is provided by the org.apache.sling.testing.sling.junit.SlingContext module and is used to set up a test environment for Sling Servlets.

3. Inject the Servlet: In the JUnit test class, use the @SlingServletResource annotation to inject an instance of the Servlet under test.

4. Create a Sling HTTP POST Request: Create a Sling HTTP POST request and set the request path to match the URL pattern of the Servlet. You can use the MockSlingHttpServletRequest class provided by the org.apache.sling.testing.mock.sling.servlet package to create the request.

5. Set Request Parameters: Set the request parameters as needed for the test. You can use the setParameter method of the MockSlingHttpServletRequest class to set request parameters.

6. Invoke the Servlet: Use the service method of the Servlet instance to invoke it with the POST request.

7. Verify the Response: Verify the response generated by the Servlet. You can use the getOutputAsString method of the MockSlingHttpServletResponse class to retrieve the response.

@RunWith(SlingContextTest.class)
public class MyServletTest {

@SlingServletResource
private SlingHttpServletRequest request;

@SlingServletResource
private SlingHttpServletResponse response;

@inject
private MyServlet servlet;

@test
public void testServlet() throws ServletException, IOException {
   request.setMethod("POST");
   request.setResource(ResourceResolver.RESOURCE_TYPE_NON_EXISTING);
   request.setParameter("param1", "value1");
   servlet.service(request, response);
   assertEquals("Expected response", response.getOutputAsString());
   }
}