What is @ContextConfiguration in spring?

Asked By: Haoyu Izabarri | Last Updated: 2nd March, 2020
Category: technology and computing programming languages
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@ContextConfiguration loads an ApplicationContext for Spring integration test. @ContextConfiguration can load ApplicationContext using XML resource or the JavaConfig annotated with @Configuration . The @ContextConfiguration annotation can also load a component annotated with @Component , @Service , @Repository etc.

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Accordingly, what is @ContextConfiguration in spring boot?

@ContextConfiguration defines class-level metadata that is used to determine how to load and configure an ApplicationContext for integration tests.

One may also ask, do you use Spring in a unit test? 1 Answer. The first paragraph you mentioned is the answer to your question, you don't need Spring to write unit tests for the classes you wrote, even when they're Spring beans. In both cases you're testing the integration between the Spring framework (Spring MVC or Spring Data) with your code (and a database).

Simply so, what is spring testing?

Testing is a crucial part in the business of software development. It ensures performance and quality of the product. The Java platform supports many testing frameworks. Spring introduces the principle of dependency injection on unit testing and has first-class support for integration testing.

What is DirtiesContext?

@DirtiesContext is a spring test annotation which is used to indicate that the application context cached should be removed and reloaded after each test run. The application context removed will also be closed. @DirtiesContext can be declared at method level as well as class level.

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What is @MockBean?

@MockBean annotation
It allow to mock a class or an interface and to record and verify behaviors on it. It can be used as a class level annotation or on fields in either @Configuration classes, or test classes that are @RunWith the SpringRunner. @MockBean is similar to mockito's @Mock but with Spring support.

What is application context in spring?

The Application Context is Spring's advanced container. Similar to BeanFactory, it can load bean definitions, wire beans together, and dispense beans upon request. BeanFactory can still be used for lightweight applications like mobile devices or applet-based applications.

What is @SpringBootTest?

@SpringBootTest is a very convenient method to set up an application context for tests that is very close the one we'll have in production. There are a lot of options to customize this application context, but they should be used with care since we want our tests to run as close to production as possible.

Which annotation will set ApplicationContext for the Test class?

@WebAppConfiguration is a class-level annotation that you can use to declare that the ApplicationContext loaded for an integration test should be a WebApplicationContext .

What is @ContextConfiguration in Junit?

@ContextConfiguration loads an ApplicationContext for Spring integration test. @ContextConfiguration can load ApplicationContext using XML resource or the JavaConfig annotated with @Configuration . The @ContextConfiguration annotation can also load a component annotated with @Component , @Service , @Repository etc.

What is the latest version of spring?

Spring Framework 4.3 has been released on 10 June 2016 and will be supported until 2020. It "will be the final generation within the general Spring 4 system requirements (Java 6+, Servlet 2.5+), []". Spring 5 is announced to be built upon Reactive Streams compatible Reactor Core.

What is spring MockMVC?

MockMVC class is part of Spring MVC test framework which helps in testing the controllers explicitly starting a Servlet container. In this MockMVC tutorial, we will use it along with Spring boot's WebMvcTest class to execute Junit testcases which tests REST controller methods written for Spring boot 2 hateoas example.

How do I check my spring cache?

2 Answers
  1. Set up an integration test that configures declarative caching (or imports the necessary bit's and pieces from your production configuration.
  2. Configure a mock instance of your repository.
  3. Write a test case to set up the expected behavior of the mock, invoke the methods and verify the output accordingly.

Which is the spring boot starter that has to be added to include FreeMarker template engine?

It uses Tomcat as the default embedded container. The spring-boot-starter-freemarker is starter for building Spring MVC applications with FreeMarker. The spring-boot-starter-jdbc is a starter for using JDBC in Spring Boot. This is City bean class.

How unit testing is done?

UNIT TESTING is a type of software testing where individual units or components of a software are tested. The purpose is to validate that each unit of the software code performs as expected. Unit Testing is done during the development (coding phase) of an application by the developers.

What is spring boot starter?

Spring Boot Starters. Spring Boot provides a number of starters that allow us to add jars in the classpath. Spring Boot built-in starters make development easier and rapid. Spring Boot Starters are the dependency descriptors.

What is spring boot framework?

Spring Boot is an open source Java-based framework used to create a micro Service. It is developed by Pivotal Team and is used to build stand-alone and production ready spring applications.

What is the use of @SpringBootTest?

The @SpringBootTest annotation can be used when we need to bootstrap the entire container. The annotation works by creating the ApplicationContext that will be utilized in our tests. We can use the webEnvironment attribute of @SpringBootTest to configure our runtime environment; we're using WebEnvironment.

How do I check my spring boot REST API?

Spring Boot is an open-source framework for application creation, and where we create our APIs. There are many different variations and techniques to Unit Test APIs.

  1. Step 1 - Create an API Testing Project.
  2. Step 2 - Add Dependencies.
  3. Step 3 - Write Your Unit Test via JUnit.
  4. Step 4 - Setting up the Unit Tests for the APIs.

Which is the spring boot annotation used for caching auto configuration?

Spring Boot auto-configures the cache infrastructure as long as caching support is enabled via the @EnableCaching annotation. Check the relevant section of the Spring Framework reference for more details.

What are the main advantages for using spring when writing unit tests?

Explanation: Spring provides convenient TestContext support classes for JUnit 3, JUnit 4, and TestNG 5, with particular test execution listeners pre registered. Explanation: JUnit 4 allows you to annotate your test methods with JUnit @Test annotation, so an arbitrary public method can be run as a test case.

Which is the UI Web framework that is built to use spring boot?

JHipster is a newer Java framework (released in 2013) that brings the Spring Boot and the two most popular front-end frameworks (Angular and React) together, in one handy application generator. With JHipster, you can quickly generate modern Java-based web applications and microservices.