out[n] = lo
				out[n+1] = hi
			}
			n += 2
			i = j + 1
		}
	}
	return out
}

// TestFowler runs this package's regexp API against the
// POSIX regular expression tests collected by Glenn Fowler
// at http://www2.research.att.com/~astopen/testregex/testregex.html.
func TestFowler(t *testing.T) {
	files, err := filepath.Glob("testdata/*.dat")
	if err != nil {
		t.Fatal(err)
	}

   * testing. At that point, we may be able to eliminate the "hole" tests, which would mean that
   * ContiguousSet's tests would no longer need to suppress them.
   */
  @CollectionSize.Require(SEVERAL)
  public void testLower() {
    assertEquals(null, navigableSet.lower(a));
    assertEquals(a, navigableSet.lower(b));
    assertEquals(b, navigableSet.lower(c));
  }

  @CollectionSize.Require(SEVERAL)
  public void testFloor() {

   * testing. At that point, we may be able to eliminate the "hole" tests, which would mean that
   * ContiguousSet's tests would no longer need to suppress them.
   */
  @CollectionSize.Require(SEVERAL)
  public void testLower() {
    assertEquals(null, navigableSet.lower(a));
    assertEquals(a, navigableSet.lower(b));
    assertEquals(b, navigableSet.lower(c));
  }

  @CollectionSize.Require(SEVERAL)
  public void testFloor() {

  public void testPollFirstUnsupported() {
    assertThrows(UnsupportedOperationException.class, () -> navigableMap.pollFirstEntry());
  }

  @CollectionSize.Require(SEVERAL)
  public void testLower() {
    resetWithHole();
    assertEquals(null, navigableMap.lowerEntry(a.getKey()));
    assertEquals(null, navigableMap.lowerKey(a.getKey()));
    assertEquals(a, navigableMap.lowerEntry(b.getKey()));

  public void testPollFirstUnsupported() {
    assertThrows(UnsupportedOperationException.class, () -> navigableMap.pollFirstEntry());
  }

  @CollectionSize.Require(SEVERAL)
  public void testLower() {
    resetWithHole();
    assertEquals(null, navigableMap.lowerEntry(a.getKey()));
    assertEquals(null, navigableMap.lowerKey(a.getKey()));
    assertEquals(a, navigableMap.lowerEntry(b.getKey()));

    try {
      sortedMultiset.pollFirstEntry();
      fail();
    } catch (UnsupportedOperationException e) {
    }
  }

  @CollectionSize.Require(SEVERAL)
  public void testLower() {
    resetWithHole();
    assertEquals(null, sortedMultiset.headMultiset(a.getElement(), OPEN).lastEntry());
    assertEquals(a, sortedMultiset.headMultiset(b.getElement(), OPEN).lastEntry());

    try {
      sortedMultiset.pollFirstEntry();
      fail();
    } catch (UnsupportedOperationException e) {
    }
  }

  @CollectionSize.Require(SEVERAL)
  public void testLower() {
    resetWithHole();
    assertEquals(null, sortedMultiset.headMultiset(a.getElement(), OPEN).lastEntry());
    assertEquals(a, sortedMultiset.headMultiset(b.getElement(), OPEN).lastEntry());

		if i < opts.Steps {
			i++
			return false, nil
		}
		return true, nil
	})
	if err != nil || i != opts.Steps {
		t.Errorf("unexpected error: %v", err)
	}
}

func TestPoller(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()
	w := poller(time.Millisecond, 2*time.Millisecond)
	ch := w(ctx)
	count := 0
DRAIN:
	for {
		select {