assertTrue(doc.entrySet().stream()
                    .anyMatch(entry -> entry.getValue().toString().toLowerCase().contains(keywords[0].toLowerCase())), doc.toString());
            assertFalse(doc.entrySet().stream()
                    .anyMatch(entry -> entry.getValue().toString().toLowerCase().contains(keywords[2].toLowerCase())), doc.toString());
        }
    }

    @Test

  private static final String UPPER = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

  public void testToLowerCase() {
    assertEquals(LOWER, Ascii.toLowerCase(UPPER));
    assertSame(LOWER, Ascii.toLowerCase(LOWER));
    assertEquals(IGNORED, Ascii.toLowerCase(IGNORED));
    assertEquals("foobar", Ascii.toLowerCase("fOobaR"));
  }

  public void testToUpperCase() {
    assertEquals(UPPER, Ascii.toUpperCase(LOWER));

    }

    public void addEncodingMapping(final String source, final String target) {
        encodingMap.put(toLowerCase(source), target);
    }

    protected String toLowerCase(final String enc) {
        return enc.toLowerCase(Locale.ROOT);
    }

                .toLowerCase(Locale.ENGLISH);
        String actualOsArch = context.getSystemProperties()
                .getOrDefault("os.arch", Os.OS_ARCH)
                .toLowerCase(Locale.ENGLISH);
        String actualOsVersion = context.getSystemProperties()
                .getOrDefault("os.version", Os.OS_VERSION)
                .toLowerCase(Locale.ENGLISH);

    }

    @Override
    String convert(CaseFormat format, String s) {
      if (format == LOWER_HYPHEN) {
        return Ascii.toLowerCase(s.replace('_', '-'));
      }
      if (format == LOWER_UNDERSCORE) {
        return Ascii.toLowerCase(s);
      }
      return super.convert(format, s);
    }
  };

  private final CharMatcher wordBoundary;
  private final String wordSeparator;

        if (map != null) {
            final String[] queries = map.get(toLowerCase(query));
            if (queries != null) {
                return queries;
            }
        }
        return StringUtil.EMPTY_STRINGS;
    }

    private String toLowerCase(final String term) {
        return term != null ? term.toLowerCase(Locale.ROOT) : term;
    }

    }

    @Override
    String convert(CaseFormat format, String s) {
      if (format == LOWER_HYPHEN) {
        return Ascii.toLowerCase(s.replace('_', '-'));
      }
      if (format == LOWER_UNDERSCORE) {
        return Ascii.toLowerCase(s);
      }
      return super.convert(format, s);
    }
  };

  private final CharMatcher wordBoundary;
  private final String wordSeparator;

            }
            return contentList.toArray(new String[contentList.size()]);
        }
        return StringUtil.EMPTY_STRINGS;
    }

    private String toLowerCase(final String term) {
        return term != null ? term.toLowerCase(Locale.ROOT) : term;
    }

    public void setRegexPrefix(final String regexPrefix) {
        this.regexPrefix = regexPrefix;
    }

        }
        if (logger.isDebugEnabled()) {
            logger.debug("Loaded {}", name);
        }
        scriptEngineMap.put(name.toLowerCase(Locale.ROOT), scriptEngine);
        scriptEngineMap.put(scriptEngine.getClass().getSimpleName().toLowerCase(Locale.ROOT), scriptEngine);
    }

    public ScriptEngine getScriptEngine(final String name) {
        if (name == null) {

                return true;
            });
        }
        return Collections.emptyList();
    }

    private String toLowerCase(final String term) {
        return term != null ? term.toLowerCase(Locale.ROOT) : term;
    }