Explain about Spring Boot testing features.

Spring Boot provides a number of utilities and annotations to help to test your application.

Use the spring-boot-starter-test "Starter", which imports both Spring Boot test modules (spring-boot-test and spring-boot-test-autoconfigure) as well as other below libraries.

• spring-boot-test, a spring boot test module that contains core items.
• spring-boot-test-autoconfigure, a spring boot test module that supports auto-configuration for tests.

Other libraries include,

• JUnit 4, the de-facto standard for unit testing Java applications.
• Spring Test & Spring Boot Test provide utilities and integration test support for Spring Boot applications.
• AssertJ, a fluent assertion library.
• Hamcrest, a library of matcher objects (a.k.a constraints or predicates).
• Mockito, Java mocking framework.
• JSONassert, assertion library for JSON.
• JsonPath, XPath for JSON.

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