var Calculator = artifacts.require("./Calculator.sol");

contract('Calculator', function (accounts) {
  var calculator;
  beforeEach(function () {
    return Calculator.new(10)
      .then(function (instance) {
        calculator = instance;
      });
  });

  it("should put initial number", function () {
    return calculator.getResult.call().then(function (result) {
      console.log('address:',calculator.address,'current result:',result.valueOf());
      assert.equal(result.valueOf(), 10, 'Wrong initial number!');
    });
  });

  it("should add 10", function () {
    return calculator.getResult.call().then(function (result) {
      console.log('address:',calculator.address,'current result:',result.valueOf());
    })
      .then(function () {
        return calculator.addToNumber(10);
      })
      .then(function () {
        return calculator.getResult.call();
      }).then(function (result) {
        assert.equal(result.valueOf(), 20, 'addToNumber failed');
      });
  });
  it("should multiply by 3", function () {
    console.log(calculator.address);
    return calculator.getResult.call().then(function (result) {
      console.log(result.valueOf());
    })
      .then(function () {
        return calculator.multiplyWithNumber(3);
      })
      .then(function () {
        return calculator.getResult.call();
      }).then(function (result) {
        assert.equal(result.valueOf(), 30, 'multiplyWithNumber failed');
      });
  });

});