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API Mocking Test Tips and Best Practices

API Mocking Test is a good way when you have only a few API interactions to mock. If you can make mock-ups, it will be useful for development and testing. This is important for teams that have complex infrastructures.

Mocking is when people make fake versions of other things, like an API or a service. Developers do this to test their code in a realistic way. They want to know what will happen if they use the API, service or both. If developers mock their work for everyday use, then they will be able to do it more easily.

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What is API Mocking?

In software design, it is possible to create a “fake” version of something. This is called mocking. It behaves like the original.
Stubbing: mostly a placeholder without any real function
Mocking: basic functions that are needed for some testing or development.
Simulation: This is to test or develop something. It will work.
Virtualization: A simulation that is used to see how the system will work. It is controllable and manageable.

APIs are often used to connect components with their surroundings. They can be used in many different ways. Let’s use an example, using a component that uses APIs to talk to other systems and services.

API Mocking Events

Mocking During Development

Developers often need to write code that connects with other systems. It can be tough to access these systems while writing the code, though. There might not be enough security, or it might not be possible at all.

This is where you can mock things. Instead of using the real thing, you use something that looks like it.

Mocking For Functional Tests

Testing is just like development for a component. It might not be available for security, performance, maintenance, or other reasons. You can do testing work with a simple mock of the component to test.

You could discover things to test, create scripts, schedule testing and so on even without a complicated mock.

Mocking For External Components

When you want to test a component that is connected to external components, using mock objects can help.

For example, you might need to test a geo-location in your component that uses Google Maps. If you use the real Google Maps API, then this will work fine. You can also use the fake one so that you don’t go over your limit for using it.

Mocking For Non-Functional Testing

Non-functional testing is to make sure that your component behaves correctly. Non-functional testing can be related to performance, SLAs, security, auditing, traceability and more. It can depend on the response from external dependencies.

Mocking can be used for non-functional testing.
Mocks can respond faster. Test time is shorter because there are fewer people. More load is put on the component because it does not have time to be idle.
Mocking 3rd party components. You can save money when you use external APIs. They will help with your load tests, too. You can also use them if something is not available.
Simulating various response times. You can make a fake response time and see how your component will do.