JarCastingSpring Test Scope 
A simple test scope for Spring.
Sometimes you have some stateful beans, eg. due to caching, that need to be recreated for every test. Using @DirtiesContext would throw the entire application context away, possibly slowing down test execution by a lot. This project introduces a test scope allows for only certain beans to be recreated while the rest of the application context can be reused.
Usage
Add the dependency
<dependency>
<groupId>com.github.marschall</groupId>
<artifactId>spring-test-scope</artifactId>
<version>1.1.0</version>
<scope>test</scope>
</dependency>
Define your beans as @TestScoped
@Bean
@TestScoped
public TestScopedBean testScopedBean() {
return new TestScopedBean();
}
If you don't want to (re)define a bean you can instead use @TestScopedBeans on a test to redefine some beans as test scoped.
@SpringJUnitConfig
@TestScopedBeans("testScopedBean")
class MyTests {
@Autowired
private TestScopedBean testScopedBean;
Requirements
- The code has only been tested with Spring 5.3.
- Java 11 is required.
- The code has only been tested with JUnit 5, in theory JUnit 4 and TestNG should work as well
Caveats
The current implementation has some limitations:
- The presence of a
ContextCustomizerFactorymay prevent sharing of an application context across test classes. - The test scope is opened in
#prepareTestInstanceand closed in#afterTestExecution. Before and after these methods in the same thread there is not test scope available and accessing test scoped beans will result in an exception. This works fine if a bean is injected into a test but may fail if:- a test scoped bean is referenced by an other bean in the application context
- test instances are reused but injection is not repeated