In addition to the valid inputs, you also create test cases with invalid requests. These so-called negative tests help you figure out if your API error handling is working as expected. You can also use these negative tests to confirm your API security through the creative design of invalid inputs that could break your API or leak data. Getting insights from tracing data through tools like Traceable AI can help you discover API usage and potential edge cases worth testing.
You should also include negative tests in your performance and API monitoring, especially when running stress tests. Some security issues may manifest themselves only under these circumstances
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