Files.createParentDirs(file);
  }

  public void testCreateParentDirs_relativePath() throws IOException {
    File file = file("nonexistent.file");
    assertNull(file.getParentFile());
    assertNotNull(file.getCanonicalFile().getParentFile());
    Files.createParentDirs(file);
  }

  public void testCreateParentDirs_noParentsNeeded() throws IOException {
    File file = file(getTempDir(), "nonexistent.file");

    }
  }

  public void testCreateParentDirectories_relativePath() throws IOException {
    Path path = FS.getPath("nonexistent.file");
    assertNull(path.getParent());
    assertNotNull(path.toAbsolutePath().getParent());
    MoreFiles.createParentDirectories(path); // test that there's no exception
  }

  public void testCreateParentDirectories_noParentsNeeded() throws IOException {

    Files.createParentDirs(file);
  }

  public void testCreateParentDirs_relativePath() throws IOException {
    File file = file("nonexistent.file");
    assertNull(file.getParentFile());
    assertNotNull(file.getCanonicalFile().getParentFile());
    Files.createParentDirs(file);
  }

  public void testCreateParentDirs_noParentsNeeded() throws IOException {
    File file = file(getTempDir(), "nonexistent.file");

            .put(1, 1)
            .put(2, 2)
            .put(3, 3)
            .put(4, 4)
            .put(5, 5)
            .put(6, 6)
            .buildOrThrow();
    assertNotNull(map.keySet().spliterator().trySplit());
  }

  public void testEquals() {
    new EqualsTester()
        .addEqualityGroup(
            ImmutableMap.of(),

            expected = range1;
          } else {
            expected = range1.span(range2);
          }
        }

        try {
          assertEquals(expected, rangeMap.span());
          assertNotNull(expected);
        } catch (NoSuchElementException e) {
          assertNull(expected);
        }
      }
    }
  }

  public void testAllRangesAlone() {
    for (Range<Integer> range : RANGES) {