TestComplexFuture.java

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package org.apache.hc.core5.concurrent;

import static org.hamcrest.MatcherAssert.assertThat;

import java.util.concurrent.Future;

import org.hamcrest.CoreMatchers;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;

class TestComplexFuture {

    @Test
    void testCancelled() {
        final ComplexFuture<Object> future = new ComplexFuture<>(null);

        final Future<Object> dependency1 = new BasicFuture<>(null);
        future.setDependency(dependency1);

        Assertions.assertFalse(future.isDone());

        future.cancel();
        assertThat(future.isCancelled(), CoreMatchers.is(true));
        assertThat(dependency1.isCancelled(), CoreMatchers.is(true));

        final Future<Object> dependency2 = new BasicFuture<>(null);
        future.setDependency(dependency2);
        assertThat(dependency2.isCancelled(), CoreMatchers.is(true));
    }

    @Test
    void testCompleted() {
        final ComplexFuture<Object> future = new ComplexFuture<>(null);

        final Future<Object> dependency1 = new BasicFuture<>(null);
        future.setDependency(dependency1);

        Assertions.assertFalse(future.isDone());

        future.completed(Boolean.TRUE);
        assertThat(future.isCancelled(), CoreMatchers.is(false));
        assertThat(dependency1.isCancelled(), CoreMatchers.is(false));

        final Future<Object> dependency2 = new BasicFuture<>(null);
        future.setDependency(dependency2);
        assertThat(dependency2.isCancelled(), CoreMatchers.is(true));
    }

    @Test
    void testCancelledWithCallback() {
        final ComplexFuture<Object> future = new ComplexFuture<>(null);

        final Future<Object> dependency1 = new BasicFuture<>(new FutureContribution<Object>(future) {

            @Override
            public void completed(final Object result) {
            }

        });
        future.setDependency(dependency1);

        Assertions.assertFalse(future.isDone());

        future.cancel();
        assertThat(future.isCancelled(), CoreMatchers.is(true));
        assertThat(dependency1.isCancelled(), CoreMatchers.is(true));

        final Future<Object> dependency2 = new BasicFuture<>(null);
        future.setDependency(dependency2);
        assertThat(dependency2.isCancelled(), CoreMatchers.is(true));
    }

    @Test
    void testCanceledAndFailed() {
        final ComplexFuture<Object> future = new ComplexFuture<>(null);
        assertThat(future.cancel(), CoreMatchers.is(true));
        assertThat(future.failed(new Exception()), CoreMatchers.is(false));
    }

}