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Optional exists the possibility to import configuration from external source. by adding static inner class with annotation.It give us possibility to override Spring configuration with our custom beans. Setup for tests – first we must include SpringExtension, which contains Mockito and some other features supporting testing in Spring (also for integration is one of these features. Of course for proper unit tests we need a mocking library, I use Mockito which is included in Spring Boot by default. TestService does not contain any classes returning multiple elements, thus we don’t need the TestPublisher

For our educational purposes I will test only Team entity, with both kinds of tests – unit and integration tests (it will be described on the next post).

I won’t cover all classes of my project with tests. TestPublisher – responsible for asynchronous emitting of predefined elements.StepVerifier – creates complete test which consists of steps executed in given order.Project Reactor (on which Spring Webflux is based) provides a great API for testing and offers us two useful tools for fast unit tests written in declarative manner. If our business logic need data from that source (at example database) we can use mocking library, which creates fake objects (stubs/mocks) for testing purposes. Running test in isolation means that any external resources are not allowed.

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They are testing the smallest piece of code in isolation and checks if the result meet requirements (expressed with assertions). Test pyramid concept describes the most optimal structure of the tests in applications – authored by Martin Fowler ( link here). In test pyramid you can find it on the lowest level. Unit test is the most common type of test.

Setup for tests with Arrange of the test data.

If you are experienced developer you might used it already – leave your feedback in comment and let me know what you think about this post ! Table of contents

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Today I will show you how to write unit tests in Webflux and some nice features of Mockito. If you want to build high quality app, you can’t avoid them. You can find it here – LINK.īut one important element is missing in this app – the tests.

In the last post I showed you how to build simple reactive web application with Spring Webflux and MongoDB from scratch. Unit testing in Spring Webflux using StepVerifier and Mockito