@Test
  public void testIsExistingPathname() {
    assertThat(IOUtils.isExistingPathname(System.getProperty("java.home"))).isTrue();
    assertThat(IOUtils.isExistingPathname(System.getProperty("user.home"))).isTrue();
    assertThat(IOUtils.isExistingPathname("/path/to/non_existing/directory/")).isFalse();
    assertThat(IOUtils.isExistingPathname("/path/to/non_existing/file.ext")).isFalse();
  }
Gets a fully-qualified path anchored at root.
<p>

@param pathElements a String array containing the elements of the path.
@return a fully-qualified pathname as a String value.
geode-core/src/test/java/org/apache/geode/internal/util/IOUtilsJUnitTest.java