TestExecutionListener for Spring + JUnit tests, similar to @DirtiesContext, but reinitializes context _before_ test class is run. The upside is that you can influence context creating from the @BeforeClass this way.

ReinitContextTestExecutionListener.java

import org.springframework.test.annotation.DirtiesContext;
import org.springframework.test.context.TestContext;
import org.springframework.test.context.support.AbstractTestExecutionListener;

public class ReinitContextTestExecutionListener extends AbstractTestExecutionListener {
    @Override
    public void beforeTestClass(final TestContext testContext) throws Exception {
        testContext.markApplicationContextDirty(DirtiesContext.HierarchyMode.EXHAUSTIVE);
    }
}