Recently, I worked on a project and, at some point, we needed to mock up some Rest Services. We started exploring API Gateway; specifically, looking for a way to create mock services. After some tests, it was clear that API Gateway offers a very simple and highly customizable approach for testing scenarios.
I will not cover all the use cases and customizations that API Gateway features. Instead, this is just a simple guide that shows how to mock a Rest service in 5 minutes. I hope this can be used as a quick introduction to API Gateway.
- From AWS console select API Gateway.
- Click on “Create new API”. Add API name and Description.
- On actions click “Create resource”.
- Add some Name and Path.
- Once the resource has been created, select it and then create a method for it.
- Click on “Check button”.
- Select “Mock integration”. Click Save.
- Once the diagram has been automatically created, select “Integration Response”.
- Click on the black arrow to see the properties.
- Select “Body Templates” -> “application/json”.
- On the text field paste the JSON response. The mocked up service will respond. Click Save.
- Select the root “/”, then click on “Actions” and “Deploy API”.
- The first time select “New Stage”, fill the text fields and click “Deploy”. Note: This is done only when you want to define a new stage. After defining a stage, you can start reusing it.
- On left pane select “Stages”. Click on the method you want to test and copy the generated URL. Note: This is the external URL that you can use, for example, from Postman.
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I hope you enjoyed this tutorial. If you have any questions, please leave a comment below. Happy Coding!
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