How to define #Rule and #ClassRule with junit5 - junit5

Question

I want to migrate junit4 to junit5 , And I use #Rule annotations for junit4. Like this:
public class A {
#ClassRule
public static final SpringClassRule SPRING_CLASS_RULE = new SpringClassRule();
#Rule
public final SpringMethodRule springMethodRule = new SpringMethodRule();
}
And I want migrate junit5 but I don't know how to change Rule and ClassRule
This is my pom.xml section junit5
<!--junit5-->
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<version>${junit.jupiter.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-engine</artifactId>
<version>${junit.jupiter.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
<version>${junit.vintage.version}</version>
<scope>test</scope>
</dependency>
<!-- Only required to run tests in an IDE that bundles an older version -->
<dependency>
<groupId>org.junit.platform</groupId>
<artifactId>junit-platform-launcher</artifactId>
<version>${junit.platform.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-migrationsupport</artifactId>
<version>${junit.jupiter.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-junit-jupiter</artifactId>
<version>2.17.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-params</artifactId>
<version>5.2.0</version>
<scope>test</scope>
</dependency>
How to I use Rule and ClassRule at junit5?

Answer 1

JUnit Jupiter introduces a new extension mechanism. Instead of Rules, you have to use the new SpringExtension which is available in Spring 5. There's a backport for Spring 4 by the original author as well.

Answer 2

Since it looks like you're not using Spring already, you do not "have to use the new SpringExtension", you can just use the BeforeAllCallback and AfterAllCallback extension APIs in JUnit 5. There's an example at Baeldung, about 2/3 of the way down the page. Note that "TestExtensionContext" is now "ExtensionContext".