assertThrows(NoSuchElementException.class, () -> iterator.next());
    assertThrows(IllegalStateException.class, () -> iterable.iterator());
  }

  public void testFrom_one() {
    Iterable<String> iterable = MinimalIterable.from(singleton("a"));
    Iterator<String> iterator = iterable.iterator();
    assertTrue(iterator.hasNext());
    assertEquals("a", iterator.next());

  }

  public void testSampleCovariance() {
    assertThrows(IllegalStateException.class, () -> emptyAccumulator.sampleCovariance());
    assertThrows(
        IllegalStateException.class,
        () -> emptyAccumulatorByAddAllEmptyPairedStats.sampleCovariance());
    assertThrows(IllegalStateException.class, () -> oneValueAccumulator.sampleCovariance());
    assertThrows(
        IllegalStateException.class,

    PotentialDeadlockException expected =
        assertThrows(PotentialDeadlockException.class, () -> lock2.lock());
    checkMessage(expected, "MyOrder.THIRD -> MyOrder.SECOND");

    expected = assertThrows(PotentialDeadlockException.class, () -> lock1.lock());
    checkMessage(expected, "MyOrder.THIRD -> MyOrder.FIRST");

    lock3.unlock();
    lock2.lock();

    expected = assertThrows(PotentialDeadlockException.class, () -> lock1.lock());

    PotentialDeadlockException expected =
        assertThrows(PotentialDeadlockException.class, () -> lock2.lock());
    checkMessage(expected, "MyOrder.THIRD -> MyOrder.SECOND");

    expected = assertThrows(PotentialDeadlockException.class, () -> lock1.lock());
    checkMessage(expected, "MyOrder.THIRD -> MyOrder.FIRST");

    lock3.unlock();
    lock2.lock();

    expected = assertThrows(PotentialDeadlockException.class, () -> lock1.lock());

  public void testCallWithTimeout_goodCallableWithNotEnoughTime() throws Exception {
    assertThrows(
        TimeoutException.class,
        () -> service.callWithTimeout(GOOD_CALLABLE, NOT_ENOUGH_MS, MILLISECONDS));
  }

  public void testCallWithTimeout_badCallableWithEnoughTime() throws Exception {
    ExecutionException expected =
        assertThrows(
            ExecutionException.class,

  }

  public void testForUriStringBad() {
    assertThrows(IllegalArgumentException.class, () -> InetAddresses.forUriString(""));

    assertThrows(
        IllegalArgumentException.class, () -> InetAddresses.forUriString("192.168.999.888"));

    assertThrows(
        IllegalArgumentException.class, () -> InetAddresses.forUriString("www.google.com"));

 */

package com.google.common.util.concurrent;

import static com.google.common.truth.Truth.assertThat;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static org.junit.Assert.assertThrows;

import java.util.concurrent.CancellationException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeoutException;
import junit.framework.TestCase;

/**

  }

  public void testSampleVariance() {
    assertThrows(IllegalStateException.class, () -> EMPTY_STATS_VARARGS.sampleVariance());
    assertThrows(IllegalStateException.class, () -> EMPTY_STATS_ITERABLE.sampleVariance());
    assertThrows(IllegalStateException.class, () -> ONE_VALUE_STATS.sampleVariance());
    assertThat(TWO_VALUES_STATS.sampleVariance())

  }

  public void testBuilderAddHandlesNullsCorrectly() {
    ImmutableList.Builder<String> builder = ImmutableList.builder();
    assertThrows(NullPointerException.class, () -> builder.add((String) null));

    assertThrows(NullPointerException.class, () -> builder.add((String[]) null));

    assertThrows(NullPointerException.class, () -> builder.add("a", null, "b"));
  }

  public void testBuilderAddAllHandlesNullsCorrectly() {

    map = new MutableTypeToInstanceMap<>();
  }

  public void testPutThrows() {
    assertThrows(
        UnsupportedOperationException.class,
        () -> map.put(TypeToken.of(Integer.class), Integer.valueOf(5)));
  }

  public void testPutAllThrows() {
    assertThrows(
        UnsupportedOperationException.class,