Reliance on APIs to foster communication between systems, apps and devices has steadily increased because of trends like cloud computing, the Internet of Things and more. Yet, because API functionality is behind the scenes, most companies don’t think about how a failure of one of these interfaces can drastically reduce user experience and increase errors. APIs should be tested alongside other features and functionality.
How to Test APIs?
APIs are tested by doing the following:
- Send calls/commands to the API
- Wait for a response
- Review the log of the system’s response to the call
- Verify that the output matches the expected output values.
While it might seem to make sense to simply send a few calls to the API and see what the response is, it isn’t enough. API testing should be incorporated into the overall test scenarios so they can be replicated for future tests or even future projects.
What These Tests Look For
The most common issues that these tests look for is how well the APIs perform during normal use. These types of tests are not looking for how well the API performs under stress, but how it would function during ordinary call volumes.
If an error does occur during normal use, then this could indicate that the API is not functioning correctly. This test helps locate and eliminate the most problematic bugs or failures.
Another purpose of these tests is to provide a baseline for testing, which can then be used for higher-level stress tests. During stress, the API should still function or fail according to certain specifications. If it fails outside of these specs, then software testers may be able to determine why.
API testing is another important test in the arsenal of software testers. Failure of an API can compromise an entire system. Use these tests to prevent breakdown of business critical applications.
iBeta is an experienced software testing firm. Contact us today to assist you with your testing needs.