assertThat(child.delete()).isTrue();

      if (!isAndroid() && !isWindows()) {
        PosixFileAttributes attributes =
            java.nio.file.Files.getFileAttributeView(temp.toPath(), PosixFileAttributeView.class)
                .readAttributes();
        assertThat(attributes.permissions())
            .containsExactly(OWNER_READ, OWNER_WRITE, OWNER_EXECUTE);
      }
    } finally {

      assertThat(file.getName()).contains("FileBackedOutputStream");
      if (!isAndroid() && !isWindows()) {
        PosixFileAttributes attributes =
            java.nio.file.Files.getFileAttributeView(file.toPath(), PosixFileAttributeView.class)
                .readAttributes();
        assertThat(attributes.permissions()).containsExactly(OWNER_READ, OWNER_WRITE);
      }
    }
    out.close();

      assertThat(child.delete()).isTrue();

      if (!isAndroid() && !isWindows()) {
        PosixFileAttributes attributes =
            java.nio.file.Files.getFileAttributeView(temp.toPath(), PosixFileAttributeView.class)
                .readAttributes();
        assertThat(attributes.permissions())
            .containsExactly(OWNER_READ, OWNER_WRITE, OWNER_EXECUTE);
      }
    } finally {

  }

  private void doTestGeneral(CharMatcher matcher, char match, char noMatch) {
    doTestOneCharMatch(matcher, "" + match);
    doTestOneCharNoMatch(matcher, "" + noMatch);
    doTestMatchThenNoMatch(matcher, "" + match + noMatch);
    doTestNoMatchThenMatch(matcher, "" + noMatch + match);
  }

  private void doTestOneCharMatch(CharMatcher matcher, String s) {

  }

  private void doTestGeneral(CharMatcher matcher, char match, char noMatch) {
    doTestOneCharMatch(matcher, "" + match);
    doTestOneCharNoMatch(matcher, "" + noMatch);
    doTestMatchThenNoMatch(matcher, "" + match + noMatch);
    doTestNoMatchThenMatch(matcher, "" + noMatch + match);
  }

  private void doTestOneCharMatch(CharMatcher matcher, String s) {

      assertThat(file.getName()).contains("FileBackedOutputStream");
      if (!isAndroid() && !isWindows()) {
        PosixFileAttributes attributes =
            java.nio.file.Files.getFileAttributeView(file.toPath(), PosixFileAttributeView.class)
                .readAttributes();
        assertThat(attributes.permissions()).containsExactly(OWNER_READ, OWNER_WRITE);
      }
    }
    out.close();