CompletableFuture.allOf().get()不能在单元测试中运行

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.springframework.test.context.junit.jupiter.SpringExtension;

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;

import static org.junit.jupiter.api.Assertions.assertEquals;

@ExtendWith(SpringExtension.class)
public class MyTest {

    @Test
    public void testAsyncOperation() throws InterruptedException, ExecutionException {
        CompletableFuture<String> future1 = CompletableFuture.supplyAsync(() -> "Hello");
        CompletableFuture<String> future2 = CompletableFuture.supplyAsync(() -> "World");

        CompletableFuture<Void> allFutures = CompletableFuture.allOf(future1, future2);

        CompletableFuture<String> combinedFuture = allFutures.thenApply(v -> {
            String result = future1.join() + " " + future2.join();
            return result;
        });

        assertEquals("Hello World", combinedFuture.get());
    }
}