@include test-module('_char-at') {
  @include test('should return the specified character at index') {
    $string: 'abcde';
    $string-two: "abcde";

    $actual: _char-at($string, 1);
    @include assert-equal($actual, 'a');

    $actual: _char-at($string-two, 1);
    @include assert-equal($actual, 'a');

    $actual: _char-at($string, 3);
    @include assert-equal($actual, 'c');

    $actual: _char-at($string-two, 3);
    @include assert-equal($actual, 'c');
  }

  @include test('should return empty string if index not in string') {
    $string: 'abc';
    $actual: _char-at($string, 4);

    @include assert-equal($actual, '');
  }
}

@include test-module('_char-code-at') {
    @include test('should return the proper char code of the specified character at index') {
        $string: 'abc';
        $actual: _char-code-at($string, 2);
        $expected: 98;

        @include assert-equal($actual, $expected);
    }

    @include test('should return null for index not in string') {
        $string: 'abc';
        $actual: _char-code-at($string, 4);
        $expected: null;

        @include assert-equal($actual, $expected);
    }
}

@include test-module('_get-char-code') {
    @include test('should return the proper char code of the specified character') {
        $actual: _get-char-code('a');
        $expected: 97;

        @include assert-equal($actual, $expected);
    }

    @include test('should return null for empty string') {
        $actual: _get-char-code('');
        $expected: null;

        @include assert-equal($actual, $expected);
    }

    @include test('should be aliased') {
        $actual: _char-code('z');
        $expected: _get-char-code('z');

        @include assert-equal($actual, $expected);
    }
}