@pytest.fixture
    def sample_javascript(self):

        return '''
var foo = function(str) {
  alert(str);
  return true;
};

foo("Hello CoffeeScript!");
'''
Append a single item to the variable var if not already there. Does
dataset/ETHPy150Open jaysonsantos/jinja-assets-compressor/tests/test_compiling.py/TestJavaScript.sample_javascript--crossover with--dataset/ETHPy150Open cournape/Bento/bento/private/_yaku/yaku/environment.py/Environment.append_unique