shape-map.spec.js

define([
    'shape-map/shape-map',
    'underscore'
], function(module, _) {
    var map;

    beforeEach(function() {
        map = new module.ShapeMap();
    });

    describe('module.ShapeMap', function() {
        describe('getPolygonColor', function() {
            var breakpoints   = [0,         5,         10,        15,        49999];
            var colors        = ['#C0E1F2', '#77C1DB', '#1174B7', '#0C47AD', '#cccccc'];
            var categoryNames = ['<5% ',    '5-10%',   '10-15%',  '>15%',    'No data'];

            describe('when the number of colors and breakpoints do not match', function() {
                it('throws an error', function() {
                    var breaks = _.clone(breakpoints);
                    breaks.push(50000);
                    expect(function() {
                        map.getPolygonColor(breaks, colors, 0)
                    }).toThrow('number of breakpoints does not match colors');
                });
            });

            describe('when a given value matches a breakpoint', function() {
                it('returns the color at the same index as the breakpoint', function() {
                    expect(map.getPolygonColor(breakpoints, colors, 0)).toEqual(colors[0]);
                    expect(map.getPolygonColor(breakpoints, colors, 5)).toEqual(colors[1]);
                    expect(map.getPolygonColor(breakpoints, colors, 10)).toEqual(colors[2]);
                    expect(map.getPolygonColor(breakpoints, colors, 15)).toEqual(colors[3]);
                    expect(map.getPolygonColor(breakpoints, colors, 49999)).toEqual(colors[4]);
                    expect(map.getPolygonColor(breakpoints, colors, 50000)).toEqual(colors[4]);
                });
            });

            describe('when a given value is between two breakpoints', function() {
                it('returns the color at the same index as the next lowest breakpoint', function() {
                    expect(map.getPolygonColor(breakpoints, colors, 2)).toEqual(colors[0]);
                    expect(map.getPolygonColor(breakpoints, colors, 7.4)).toEqual(colors[1]);
                    expect(map.getPolygonColor(breakpoints, colors, 11.99)).toEqual(colors[2]);
                    expect(map.getPolygonColor(breakpoints, colors, 15000)).toEqual(colors[3]);
                    expect(map.getPolygonColor(breakpoints, colors, 500000)).toEqual(colors[4]);
                });
            });
        });
    });
});