it('should support formula', function (done) { w.onmessage = function (event) { assert.deepEqual(event.data, [{}, { A1: -579, A2: 71217, B1: 123, B2: 456 }]); done(); }; w.postMessage({ A1: '=-B1-B2', A2: '=$B1*-$A1+C9-J19', B1: 123, B2: 456 }); });