### Question:
Inflector { public String titleCase(String words, String... removableTokens) { String result = humanize(words, removableTokens); result = replaceAllWithUppercase(result, "\\b([a-z])", 1); return result; } Inflector(); protected  Inflector(Inflector original); @Override Inflector clone(); String pluralize(Object word); String pluralize(Object word,
            int count); String singularize(Object word); String lowerCamelCase(String lowerCaseAndUnderscoredWord,
            char... delimiterChars); String upperCamelCase(String lowerCaseAndUnderscoredWord,
            char... delimiterChars); String camelCase(String lowerCaseAndUnderscoredWord,
            boolean uppercaseFirstLetter,
            char... delimiterChars); String underscore(String camelCaseWord,
            char... delimiterChars); String capitalize(String words); String humanize(String lowerCaseAndUnderscoredWords,
            String... removableTokens); String titleCase(String words,
            String... removableTokens); String ordinalize(int number); boolean isUncountable(String word); Set<String> getUncountables(); void addPluralize(String rule,
            String replacement); void addSingularize(String rule,
            String replacement); void addIrregular(String singular,
            String plural); void addUncountable(String... words); void clear();  }### Answer:
@Test public void shouldConvertToTitleCase() { titleCase("active_record", "Active Record"); titleCase("first_name", "First Name"); titleCase("name", "Name"); titleCase("the_first_name", "The First Name"); titleCase("employee_salary", "Employee Salary"); titleCase("underground", "Underground"); titleCase("id", "Id"); titleCase("employee_id", "Employee"); titleCase("employee_value_string", "Employee String", "value"); }