code: function notEqual(actual, expected, message) {
      if (actual != expected) {
        this.pass(message);
      }
      else {
        this.fail({
          actual: actual,
          expected: expected,
          message: message,
          operator: "!=",
        });
      }
    }
docs: The non-equality assertion tests for whether two objects are not equal
  with `!=`.
  @example
  assert.notEqual(1, 2, "one is not two");