ES6 Katas template strings - String.raw

es6_templatestrings_raw.js

// 4: template strings - String.raw
// To do: make all tests pass, leave the asserts unchanged!
// Follow the hints of the failure messages!

describe('Use the `raw` property of tagged template strings like so `s.raw`', function() {
  it('the `raw` property accesses the string as it was entered', function() {
    function firstChar(strings) {
      return strings.raw;
    }
    assert.equal(firstChar`\n`, '\\n');
  });
  it('`raw` can access the backslash of a line-break', function() {
    function firstCharEntered(strings) {
      var lineBreak = strings.raw[0][0];
      return lineBreak;
    }
    assert.equal(firstCharEntered`\n`, '\\');
  });
  describe('`String.raw` as a static function', function(){
    it('concats the raw strings', function() {
      var expected = '\n';
      assert.equal(String.raw`
`, expected);
    });
    it('two raw-templates-string-backslashes equal two escaped backslashes', function() {
      const TWO_BACKSLASHES = '\\\\';
      assert.equal(String.raw`\\`, TWO_BACKSLASHES);
    });
    it('works on unicodes too', function() {
      var smilie = '\\u{1F600}';
      var actual = String.raw`\u{1F600}`;
      assert.equal(actual, smilie);
    });
  });
});