/**
 * Tests Calc
 *
 *  Copyright (C) 2010-2019 R-T Specialty, LLC.
 *
 *  This file is part of liza.
 *
 *  liza is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

var liza         = require( '../..' ),
    relativeDate = liza.calc.Calc.relativeDate,
    expect       = require( 'chai' ).expect;


describe( 'relativeDate', function()
{
    //returns a date relative to another date by adding a given value

    it( 'assert 10 days is added, the date\'s month changes', function()
    {
        expect( relativeDate( ['2019-11-25'], ['10d'] ) )
            .to.have.all.members( ['2019-12-05'] );
    });

    it( 'assert 10 days is added, the date\'s month and year changes', function()
    {
        expect( relativeDate( ['2019-12-28'], ['10d'] ) )
            .to.have.all.members( ['2020-01-07'] );
    });

    it( 'assert edge case 6 months is added, the date does not go into the 7th month', function()
    {
        expect( relativeDate( ['2019-12-31'], ['6m'] ) )
            .to.have.all.members( ['2020-06-30'] );
    });

    it( 'assert edge case 3 months is added, the date does not go into the 4th month', function()
    {
        expect( relativeDate( ['2019-08-31'], ['3m'] ) )
            .to.have.all.members( ['2019-11-30'] );
    });

    it( 'assert 2 years is added', function()
    {
        expect( relativeDate( ['2019-12-31'], ['2y'] ) )
            .to.have.all.members( ['2021-12-31'] );
    });

    it( 'assert edge case february', function()
    {
        expect( relativeDate( ['2018-12-31'], ['2m'] ) )
            .to.have.all.members( ['2019-02-28'] );
    });

    it( 'assert edge case february leap year', function()
    {
        expect( relativeDate( ['2019-12-31'], ['2m'] ) )
            .to.have.all.members( ['2020-02-29'] );
    });
});