This app is build base on nodejs. If you don't have nodejs installed in your system, here is the instruction.
To run the app, you just need to simply type npm start, then the app will ask input (start and end date), enter the dates then you will see the result.
> npm start
> date-calculator@1.0.0 start /Users/zhefeng/development/date-calculator
> node .
Please enter the start date (DD/MM/YYYY):
11/12/2015
Please enter the end date (DD/MM/YYYY):
22/12/2015
11/12/2015 - 22/12/2015: 10 days
To run the test script, you need to install some dependencies, in this app, we using Mocha to do the test. So just type npm install, then all dependencies will be installed.
> npm install
npm WARN package.json date-calculator@1.0.0 No license field.
npm WARN deprecated graceful-fs@2.0.3: graceful-fs version 3 and before will fail on newer node releases. Please update to graceful-fs@^4.0.0 as soon as possible.
mocha@2.4.5 node_modules/mocha
├── escape-string-regexp@1.0.2
├── diff@1.4.0
├── commander@2.3.0
├── supports-color@1.2.0
├── growl@1.8.1
├── debug@2.2.0 (ms@0.7.1)
├── mkdirp@0.5.1 (minimist@0.0.8)
├── jade@0.26.3 (commander@0.6.1, mkdirp@0.3.0)
└── glob@3.2.3 (inherits@2.0.1, graceful-fs@2.0.3, minimatch@0.2.14)
After install the dependencies, we can start to do the test, in this app, all you need to do is type npm test.
> npm test
> date-calculator@1.0.0 test /Users/zhefeng/development/date-calculator
> mocha
Calculator
count days
✓ calculate the number of full days elapsed
✓ should never counted the first and the last day
✓ should count 0 if end date is before or equal the start date
Utilities
parseDate
✓ should return null if format not in DD/MM/YYYY. (eg. asdfasdf/asdf, asdfsdf)
✓ should return null if day, month or year is not an integer. (eg. 12/dd/1999)
✓ should return null if day, month or year is not a valid date number. (eg. 55/55/1999)
formatDate
✓ should convert date object into to string with format DD/MM/YYYY
✓ should fill the 0 into interger under 10. (eg. 1/4/2015 - 01/04/2015)
8 passing (13ms)