assertThat(future.isDone()).isTrue();
    assertThat(Thread.interrupted()).isFalse();
  }

  public void testSubmit_callable_returnsValue() throws Exception {
    ListenableFuture<Integer> future = submit(() -> 42, directExecutor());
    assertThat(future.isDone()).isTrue();
    assertThat(getDone(future)).isEqualTo(42);
  }

    NullBounds<?, ?, ?> nullBounds = new NullBounds<>();
    new NullPointerTester().testAllPublicInstanceMethods(nullBounds);
    assertThat(nullBounds.xWasCalled).isTrue();
  }

import assertk.assertions.isLessThan
import assertk.assertions.isNotEmpty
import assertk.assertions.isNotNull
import assertk.assertions.isNotSameAs
import assertk.assertions.isNull
import assertk.assertions.isTrue
import assertk.assertions.matches
import assertk.assertions.prop
import assertk.assertions.startsWith
import assertk.fail
import java.io.FileNotFoundException
import java.io.IOException

      MinMaxPriorityQueue<Integer> queue = MinMaxPriorityQueue.create(elements);
      shuffle(elements, random);
      for (Integer element : elements) {
        assertThat(queue.remove(element)).isTrue();
        assertIntact(queue);
        assertThat(queue).doesNotContain(element);
      }
      assertThat(queue).isEmpty();
    }
  }

  public void testRandomAddsAndRemoves() {

import assertk.assertions.hasMessage
import assertk.assertions.isCloseTo
import assertk.assertions.isEqualTo
import assertk.assertions.isFalse
import assertk.assertions.isNull
import assertk.assertions.isTrue
import assertk.fail
import java.io.IOException
import java.net.HttpURLConnection
import java.net.SocketTimeoutException
import java.time.Duration
import java.util.Arrays
import java.util.concurrent.BlockingQueue

import assertk.assertions.isIn
import assertk.assertions.isInstanceOf
import assertk.assertions.isLessThan
import assertk.assertions.isNotEmpty
import assertk.assertions.isNull
import assertk.assertions.isTrue
import assertk.fail
import java.io.File
import java.io.IOException
import java.io.InputStream
import java.net.ConnectException
import java.net.CookieManager
import java.net.HttpURLConnection