Huljo / MowItNow

'use strict';

var expect = require('expect.js');

var Grid = require('../lib/grid');

var Position = require('../lib/position');

describe('Grid', function() {

    describe('setItemPosition', function () {

        var grid = new Grid(new Position({x:5,y:5}, 'N'));

        it('should add a position to occupation object', function () {

            var position = new Position({x:1,y:1}, 'N');

            grid.setItemPosition(0, position);

            expect(grid.occupation[0]).to.equal(position);

        });

        it('should update an item’s position in occupation object', function () {

            var position = new Position({x:2,y:2}, 'S');

            grid.setItemPosition(0, position);

            expect(grid.occupation[0]).to.equal(position);

        });

    });

    describe('getCellOccupation', function () {

        var grid = new Grid(new Position({x:5,y:5}, 'N')),

            itemPosition = new Position({x:4,y:4}, 'N');

        grid.setItemPosition(0, itemPosition); // set a test item

        it('should return ’id’ of item who match an occupied cell', function () {

            var position = new Position({x:4,y:4}, 'N');

            expect(grid.getCellOccupation(position)).to.equal(0);

        });

        it('should return ’null’ if no item has been found for the given cell', function () {

            var position = new Position({x:3,y:3}, 'N');

            expect(grid.getCellOccupation(position)).to.equal(null);

        });

        it('should throw an error when position is not valid', function () {

            expect(function() {

                grid.getCellOccupation(false);

            }).to.throwException(/Position is not valid/);

        });

    });

    describe('isValid', function () {

        it('should throw an error when X is not valid', function () {

            expect(function() {

                new Grid({x:false,y:5});

            }).to.throwException(/Coordinates are not valid/);

        });

        it('should throw an error when Y is not valid', function () {

            expect(function() {

                new Grid({x:5,y:false});

            }).to.throwException(/Coordinates are not valid/);

        });

    });

});