text: export const tests = {
  
    'lexical this'(test) {
  
      function f() {
        var a = () => this;
        return a();
      }
  
      let obj = {};
  
      test._('This value is lexically scoped')
        .equals(f.call(obj), obj);
    },
  
    'lexical arguments'(test) {
  
      function f() {
        var a = () => arguments;
        return Array.from(a('a', 'b', 'c'));
      }
  
      test._('The arguments object is lexically scoped')
        .equals(f(1, 2, 3), [1, 2, 3]);
    }
  
  };
  