Here we do not need to import the test configuration explicitly. The test configuration is defined as a static inner class in this test. Configuring a Test with us look at the structure of a unit test in Spring Boot where we define the beans in a configuration class annotated with the (locations = "classpath:test.properties" ) class TestConfigurationExampleAppTests private DataService dataService // Test methods of dataService We will use this project to create our service class and bean configurations and then write tests using the annotation. WebClient is a non-blocking, reactive client to perform HTTP requests. We have added a dependency on Spring WebFlux in this project since we will work around configuring a bean for WebClient in different ways in the test environment for accessing REST APIs. We can best understand the annotation by first looking at the annotation which is the parent annotation it inherits from.īefore that, let us create a Spring Boot project with the help of the Spring Boot Initializr, and then open the project in our favorite IDE. We can use it to override certain bean definitions, for example to replace real beans with fake beans or to change the configuration of a bean to make it better testable. We use to modify Spring’s application context during test runtime. This article is accompanied by a working code example on GitHub. In this article, we will see the use of the annotation for writing unit tests for a Spring Boot applications. It allows us to define additional beans or override existing beans in the Spring application context to add specialized configurations for testing. The annotation is a useful aid for writing unit tests of components in a Spring Boot application. This makes the verification process easy and fast since the scope of the testing is narrowed down to a class or method. A unit test is used to verify the smallest part of an application (a “unit”) independent of other parts.
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