Solution: Understand the requirement clearly and have a proper set of test data. Here are a few of them: Lack of end-user experience While performing API tests, you may encounter challenges. You can use the following tools for functional testing: Prepare test data and test cases in advance so you don’t miss any functional use cases. To perform this test, you should have a solid understanding of the acceptance and functionality of the API. You validate whether the payload, status codes, and header content are working as expected. Tools you can use for integration testing include:įunctional testing is performed to validate the functional aspects of each API. This way you can observe and test the application. Then test them again after switching both on simultaneously. So you should test each API independently and then test them again after merging.Īfter merging the APIs, try to test them after switching one API off and switching another on. Some APIs are dependent on each other and if one fails to function properly, it can affect the others. Validate the data flow and whether the API is functioning as expected after integration. You can perform integration testing once APIs are integrated. You can write unit tests using these tools: After a developer writes or adds a block of code, they need to run unit test cases to make sure the code is working. In most companies, the developer writes unit tests, but in some cases, due to time limitations, a tester is also involved. Each API is tested separately as an individual entity. ![]() These tests are written to run automatically with each new build run. Unit testing is performed in the development stage. You can also track how much time an API is taking to load and give the response. ![]() If an operation is completed successfully but takes an unreasonable amount of time, it fails the test. This is optional and applies mainly to manual testing, or when a UI or other interface can be easily inspected. In headers, one can validate the content-type, server, and content-encoding. HTTP server headers have implications for both security and performance. You can use an assertion to test the attributes if you are using SoapUI or any other automation tool. When working with REST API, verify that the JSON/XML body is valid and field names, types, and values are correct - including in error responses. So, it’s important to know different status codes while doing API testing. HTTP status codes are categorized into five groups: informational responses, successful responses, redirection messages, client error responses, and server error responses.įor example, creating a new resource should return 201 CREATED and unpermitted requests should return 403 FORBIDDEN. It is important to know what to test before doing API testing, so here is a step-by-step guide to follow:Īn HTTP status code defines the server response to the API request, indicating whether the request is completed or not.
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