* be thrown by calling {@code finishToFuture().get()} if this were the last step. Calling {@code
   * cancel()} on the returned future has no effect on the {@code ClosingFuture} pipeline.
   *
   * <p>{@code statusFuture} differs from most methods on {@code ClosingFuture}: You can make calls
   * to {@code statusFuture} <i>in addition to</i> the call you make to {@link #finishToFuture()} or

   * be thrown by calling {@code finishToFuture().get()} if this were the last step. Calling {@code
   * cancel()} on the returned future has no effect on the {@code ClosingFuture} pipeline.
   *
   * <p>{@code statusFuture} differs from most methods on {@code ClosingFuture}: You can make calls
   * to {@code statusFuture} <i>in addition to</i> the call you make to {@link #finishToFuture()} or

import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;
import org.mockito.Mockito;

/**
 * Tests for {@link ClosingFuture}. Subclasses exercise either the {@link
 * ClosingFuture#finishToFuture()} or {@link
 * ClosingFuture#finishToValueAndCloser(ValueAndCloserConsumer, Executor)} paths to complete a
 * {@link ClosingFuture} pipeline.
 */
@NullUnmarked