@Test
  public void testVerifyPathnameExistsWithNonExistingPathname() {
    assertThatThrownBy(() -> IOUtils.verifyPathnameExists("/path/to/non_existing/file.test"))
        .isInstanceOf(FileNotFoundException.class)
        .hasMessage("Pathname (/path/to/non_existing/file.test) could not be found!");
  }
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