Medium snippet 1

snippet1.java

public class TestExtension implements BeforeAllCallback {
    private static final ExtensionContext.Namespace NAMESPACE = ExtensionContext.Namespace.create("TestExtension");
    private static final String TEST_CONTEXT_PLACEHOLDER = "testContext";
    
    @Override
    public void beforeAll(final ExtensionContext extensionContext) throws Exception {
        if (TestExtensionInitializer.INSTANCE.initialize()) {
            var testContext = TestContext.init();

            extensionContext.getRoot()
                .getStore(NAMESPACE)
                .put(TEST_CONTEXT_PLACEHOLDER, testContext);
        }
    }
}