Nodeunit test

testCalculator.js

'use strict';
require('../../../bootstrap.js');
require(rootPath + '/src/js/lib/Calculator.js');

var calculatorDataProvider = {
    'Empty calculator': {
        amountDue: 0.00,
        amountTenderedAfterAmountDueSet: 0.00,
        changeGivenAfterAmountDueSet: 0.00,
        amountTendered: 0.00,
        changeGiven: 0.00,
        amountTenderedAfterClear: 0.00,
        changeGivenAfterClear: 0.00
    },
    'Sale of 9.99 with 15.00 tendered and 5.01 change given': {
        amountDue: 9.99,
        amountTenderedAfterAmountDueSet: 0.00,
        changeGivenAfterAmountDueSet: 0.00,
        amountTendered: 15.00,
        changeGiven: 5.01,
        amountTenderedAfterClear: 0.00,
        changeGivenAfterClear: 0.00
    },
    'Refund of 9.99 with no tendering and 9.99 change given': {
        amountDue: -9.99,
        amountTenderedAfterAmountDueSet: 0.00,
        changeGivenAfterAmountDueSet: 9.99,
        amountTendered: 0.00,
        changeGiven: 9.99,
        amountTenderedAfterClear: 0.00,
        changeGivenAfterClear: 9.99
    },
    'Refund of 9.99 with 0.01 tender and 10.00 change given': {
        amountDue: -9.99,
        amountTenderedAfterAmountDueSet: 0.00,
        changeGivenAfterAmountDueSet: 9.99,
        amountTendered: 0.01,
        changeGiven: 10.00,
        amountTenderedAfterClear: 0.00,
        changeGivenAfterClear: 9.99
    }
};

exports.CalculatorTest = {
    withoutCalculationCallback: dataProvider(
        calculatorDataProvider,
        function (test, data, testName) {
            test.expect(8);

            // New calculator should be 0 and 0
            var calculator = new DigiTickets.Calculator();
            test.equals(calculator.getAmountTendered(), 0.00,
                'Amount Tendered starts at 0.00 for ' + testName);
            test.equals(calculator.getChange(), 0.00,
                'Change Given starts at 0.00 for ' + testName);

            calculator.setAmountDue(data.amountDue);
            test.equals(calculator.getAmountTendered(), data.amountTenderedAfterAmountDueSet,
                'Amount Tendered is ' + data.amountTenderedAfterAmountDueSet + ' after Amount Due set for ' + testName);
            test.equals(calculator.getChange(), data.changeGivenAfterAmountDueSet,
                'Change Given still ' + data.changeGivenAfterAmountDueSet + ' after Amount Due set for ' + testName);

            calculator.setAmountTendered(data.amountTendered);
            test.equals(calculator.getAmountTendered(), data.amountTendered,
                'Amount Tendered set to ' + data.amountTendered + ' for ' + testName);
            test.equals(calculator.getChange(), data.changeGiven,
                'Change Given calculated to be ' + data.changeGiven + ' for ' + testName);

            calculator.clear();
            test.equals(calculator.getAmountTendered(), data.amountTenderedAfterClear,
                'Amount Tendered back to ' + data.amountTenderedAfterClear + ' once cleared for ' + testName);
            test.equals(calculator.getChange(), data.changeGivenAfterClear,
                'Change Given back to ' + data.changeGivenAfterClear + ' once cleared for ' + testName);

            test.done();
        }
    ),

    withCalculationCallback: dataProvider(
        calculatorDataProvider,
        function (test, data, testName) {
            var callbacksCalled = 0;
            var returnedCalculator = null;

            test.expect(18);

            // New calculator should be 0 and 0
            var calculator = new DigiTickets.Calculator(function (calculator) {
                ++callbacksCalled;
                returnedCalculator = calculator;
            });
            test.equals(calculator.getAmountTendered(), 0.00,
                'Amount Tendered starts at 0.00 for ' + testName);
            test.equals(calculator.getChange(), 0.00,
                'Change Given starts at 0.00 for ' + testName);
            test.equals(callbacksCalled, 0,
                'Callback called 0 times for ' + testName);

            calculator.setAmountDue(data.amountDue);
            test.equals(calculator.getAmountTendered(), data.amountTenderedAfterAmountDueSet,
                'Amount Tendered is ' + data.amountTenderedAfterAmountDueSet + ' after Amount Due set for ' + testName);
            test.equals(calculator.getChange(), data.changeGivenAfterAmountDueSet,
                'Change Given still ' + data.changeGivenAfterAmountDueSet + ' after Amount Due set for ' + testName);
            test.equals(callbacksCalled, 1,
                'Callback called 1 times for ' + testName);
            test.equals(returnedCalculator.getAmountTendered(), data.amountTenderedAfterAmountDueSet,
                'Callback Amount Tendered still ' + data.amountTenderedAfterAmountDueSet + ' after Amount Due set for ' + testName);
            test.equals(returnedCalculator.getChange(), data.changeGivenAfterAmountDueSet,
                'Callback Change Given still ' + data.changeGivenAfterAmountDueSet + ' after Amount Due set for ' + testName);

            calculator.setAmountTendered(data.amountTendered);
            test.equals(calculator.getAmountTendered(), data.amountTendered,
                'Amount Tendered set to ' + data.amountTendered);
            test.equals(calculator.getChange(), data.changeGiven,
                'Change Given calculated to be ' + data.changeGiven);
            test.equals(callbacksCalled, 2,
                'Callback called 2 times for ' + testName);
            test.equals(returnedCalculator.getAmountTendered(), data.amountTendered,
                'Callback Amount Tendered set to ' + data.amountTendered);
            test.equals(returnedCalculator.getChange(), data.changeGiven,
                'Callback Change Given calculated to be ' + data.changeGiven);

            calculator.clear();
            test.equals(calculator.getAmountTendered(), data.amountTenderedAfterClear,
                'Amount Tendered back to ' + data.amountTenderedAfterClear + ' once cleared for ' + testName);
            test.equals(calculator.getChange(), data.changeGivenAfterClear,
                'Change Given back to ' + data.changeGivenAfterClear + ' once cleared for ' + testName);
            test.equals(callbacksCalled, 3,
                'Callback called 3 times for ' + testName);
            test.equals(returnedCalculator.getAmountTendered(), data.amountTenderedAfterClear,
                'Callback Amount Tendered back to ' + data.amountTenderedAfterClear + ' once cleared for ' + testName);
            test.equals(returnedCalculator.getChange(), data.changeGivenAfterClear,
                'Callback Change Given back to ' + data.changeGivenAfterClear + ' once cleared for ' + testName);

            test.done();
        }
    )
};