Writing Postman tests
Testing an API is not only about checking that its call returns a return code of 200, that is, that the API responds well, but also that its return result corresponds to what is expected, or that its execution time is not too long.
For example, consider an API that returns a response in JSON format with several properties. In the tests of this API, it will be necessary to verify that the result returned is a JSON text that contains the expected properties, and even more so to verify the values of these properties.
In Postman, it is possible to write tests that will ensure that the response of the request corresponds to the expected result in terms of return or execution time using the JavaScript language.
Postman tests are written in the Tests tab of the request:
Figure 11.13 – Postman Tests tab
To test our request, we will write several tests, which are as follows:
- That the return code of the request is 200...
