c3/spec/shape.bar-spec.js

describe('c3 chart shape bar', function () {
    'use strict';

    var chart, args;

    beforeEach(function (done) {
        chart = window.initChart(chart, args, done);
    });

    describe('with groups', function () {

        describe('with indexed data', function () {
            beforeAll(function () {
                args = {
                    data: {
                        columns: [
                            ['data1', 30, 200, -100, 400, -150, 250],
                            ['data2', 50, 20, 10, 40, 15, 25],
                        ],
                        groups: [
                            ['data1', 'data2'],
                        ],
                        type: 'bar'
                    },
                };
            });
            it('should be stacked', function () {
                var expectedBottom = [275, 293, 365, 281, 395, 290];
                chart.internal.main.selectAll('.c3-bars-data1 .c3-bar').each(function (d, i) {
                    var rect = d3.select(this).node().getBoundingClientRect();
                    expect(rect.bottom).toBeCloseTo(expectedBottom[i], -1);
                });
           });
        });

        describe('with timeseries data', function () {
            beforeAll(function () {
                args = {
                    data: {
                        x: 'date',
                        columns: [
                            ['date', '2012-12-24', '2012-12-25', '2012-12-26', '2012-12-27', '2012-12-28', '2012-12-29'],
                            ['data1', 30, 200, -100, 400, -150, 250],
                            ['data2', 50, 20, 10, 40, 15, 25],
                        ],
                        groups: [
                            ['data1', 'data2'],
                        ],
                        type: 'bar'
                    },
                    axis: {
                        x: {
                            type: 'timeseries',
                        }
                    }
                };
            });
            it('should be stacked', function () {
                var expectedBottom = [275, 293, 365, 281, 395, 290];
                chart.internal.main.selectAll('.c3-bars-data1 .c3-bar').each(function (d, i) {
                    var rect = d3.select(this).node().getBoundingClientRect();
                    expect(rect.bottom).toBeCloseTo(expectedBottom[i], -1);
                });
           });
        });

        describe('with category data', function () {
            beforeAll(function () {
                args = {
                    data: {
                        x: 'date',
                        columns: [
                            ['date', '2012-12-24', '2012-12-25', '2012-12-26', '2012-12-27', '2012-12-28', '2012-12-29'],
                            ['data1', 30, 200, -100, 400, -150, 250],
                            ['data2', 50, 20, 10, 40, 15, 25],
                        ],
                        groups: [
                            ['data1', 'data2'],
                        ],
                        type: 'bar'
                    },
                    axis: {
                        x: {
                            type: 'category',
                        }
                    }
                };
            });

            it('should be stacked', function () {
                var expectedBottom = [275, 293, 365, 281, 395, 290];
                chart.internal.main.selectAll('.c3-bars-data1 .c3-bar').each(function (d, i) {
                    var rect = d3.select(this).node().getBoundingClientRect();
                    expect(rect.bottom).toBeCloseTo(expectedBottom[i], -1);
                });
           });
        });

    });

    describe('internal.isWithinBar', function () {

        describe('with normal axis', function () {

            beforeAll(function () {
                args = {
                    data: {
                        columns: [
                            ['data1', 30, 200, 100, 400, -150, 250],
                            ['data2', 50, 20, 10, 40, 15, 25],
                            ['data3', -150, 120, 110, 140, 115, 125]
                        ],
                        type: 'bar'
                    },
                    axis: {
                        rotated: false
                    }
                };
            });

            it('should not be within bar', function () {
                var bar = d3.select('.c3-target-data1 .c3-bar-0').node();
                expect(chart.internal.isWithinBar([0, 0], bar)).toBeFalsy();
            });

            it('should be within bar', function () {
                var bar = d3.select('.c3-target-data1 .c3-bar-0').node();
                expect(chart.internal.isWithinBar([31, 280], bar)).toBeTruthy();
            });

            it('should not be within bar of negative value', function () {
                var bar = d3.select('.c3-target-data3 .c3-bar-0').node();
                expect(chart.internal.isWithinBar([68, 280], bar)).toBeFalsy();
            });

            it('should be within bar of negative value', function () {
                var bar = d3.select('.c3-target-data3 .c3-bar-0').node();
                expect(chart.internal.isWithinBar([68, 350], bar)).toBeTruthy();
            });
        });

        describe('with rotated axis', function () {

            beforeAll(function () {
                args.axis.rotated = true;
            });

            it('should not be within bar', function () {
                var bar = d3.select('.c3-target-data1 .c3-bar-0').node();
                expect(chart.internal.isWithinBar([0, 0], bar)).toBeFalsy();
            });

            it('should be within bar', function () {
                var bar = d3.select('.c3-target-data1 .c3-bar-0').node();
                expect(chart.internal.isWithinBar([190, 20], bar)).toBeTruthy();
            });

            it('should be within bar of negative value', function () {
                var bar = d3.select('.c3-target-data3 .c3-bar-0').node();
                expect(chart.internal.isWithinBar([68, 50], bar)).toBeTruthy();
            });

        });

    });

    describe('bar spacing', function() {

        var createArgs = function(spacing) {
            return {
                size: {
                  width: 500
                },
                data: {
                    columns: [
                        ['data1', 30, 200, 100],
                        ['data2', 50, 20, 10],
                        ['data3', 150, 120, 110],
                        ['data4', 12, 24, 20 ]
                    ],
                    type: 'bar',
                    groups: [
                        [ 'data1', 'data4' ]
                    ]
                },
                bar: {
                    space: spacing
                }
            };
        };

        var getBBox = function(selector) {
          return d3.select(selector).node().getBBox();
        };

        var getBarContainerWidth = function() {
            return parseInt(getBBox('.c3-chart-bars').width);
        };

        var getBarContainerOffset = function() {
            return parseInt(getBBox('.c3-chart-bars').x);
        };

        var getBarBBox = function(name, idx) {
            return getBBox('.c3-target-' + name + ' .c3-bar-' + (idx || 0));
        };

        var getBarWidth = function(name, idx) {
          return parseInt(getBarBBox(name, idx).width);
        };

        var getBarOffset = function(name1, name2, idx) {
            var bbox1 = getBarBBox(name1, idx);
            var bbox2 = getBarBBox(name2, idx);
            return parseInt(bbox2.x - (bbox1.x + bbox1.width));
        };

        it('should set bar spacing to 0', function () {
            args = createArgs(0);
            expect(true).toBeTruthy();
        });

        it('should display the bars without any spacing', function () {
            // all bars should have the same width
            expect(getBarWidth('data1', 0)).toEqual(30);
            expect(getBarWidth('data2', 0)).toEqual(30);
            expect(getBarWidth('data3', 0)).toEqual(30);
            expect(getBarWidth('data1', 1)).toEqual(30);
            expect(getBarWidth('data2', 1)).toEqual(30);
            expect(getBarWidth('data3', 1)).toEqual(30);
            expect(getBarWidth('data1', 2)).toEqual(30);
            expect(getBarWidth('data2', 2)).toEqual(30);
            expect(getBarWidth('data3', 2)).toEqual(30);

            // all offsets should be the same
            expect(getBarOffset('data1', 'data2', 0)).toEqual(0);
            expect(getBarOffset('data2', 'data3', 0)).toEqual(0);
            expect(getBarOffset('data1', 'data2', 1)).toEqual(0);
            expect(getBarOffset('data2', 'data3', 1)).toEqual(0);
            expect(getBarOffset('data1', 'data2', 2)).toEqual(0);
            expect(getBarOffset('data2', 'data3', 2)).toEqual(0);

            // default width/offset of the container for this chart
            expect(getBarContainerWidth()).toEqual(396);
            expect(getBarContainerOffset()).toEqual(31);
        });

        it('should set bar spacing to 0.25', function () {
            args = createArgs(0.25);
            expect(true).toBeTruthy();
        });

        it('should display the bars with a spacing ratio of 0.25', function () {
            // with bar_space of 0.25, the space between bars is
            // expected to be 25% of the original bar's width
            // which is ~7

            // expect all bars to be the same width
            expect(getBarWidth('data1', 0)).toEqual(22);
            expect(getBarWidth('data2', 0)).toEqual(22);
            expect(getBarWidth('data3', 0)).toEqual(22);
            expect(getBarWidth('data1', 1)).toEqual(22);
            expect(getBarWidth('data2', 1)).toEqual(22);
            expect(getBarWidth('data3', 1)).toEqual(22);
            expect(getBarWidth('data1', 2)).toEqual(22);
            expect(getBarWidth('data2', 2)).toEqual(22);
            expect(getBarWidth('data3', 2)).toEqual(22);

            // all offsets should be the same
            expect(getBarOffset('data1', 'data2', 0)).toEqual(7);
            expect(getBarOffset('data2', 'data3', 0)).toEqual(7);
            expect(getBarOffset('data1', 'data2', 1)).toEqual(7);
            expect(getBarOffset('data2', 'data3', 1)).toEqual(7);
            expect(getBarOffset('data1', 'data2', 2)).toEqual(7);
            expect(getBarOffset('data2', 'data3', 2)).toEqual(7);

            // expect the container to shrink a little because of
            // the offsets from the first/last chart
            // we add/subtract 1 because of approximation due to rounded values
            expect(getBarContainerWidth()).toEqual(396 - 7 - 1);
            expect(getBarContainerOffset()).toEqual(31 + (parseInt(7 / 2) + 1));
        });

        it('should set bar spacing to 0.5', function () {
            args = createArgs(0.5);
            expect(true).toBeTruthy();
        });

        it('should display the bars with a spacing ratio of 0.5', function () {
            // with bar_space of 0.5, the space between bars is
            // expected to be 50% of the original bar's width
            // which is ~15

            // expect all bars to be the same width
            expect(getBarWidth('data1', 0)).toEqual(15);
            expect(getBarWidth('data2', 0)).toEqual(15);
            expect(getBarWidth('data3', 0)).toEqual(15);
            expect(getBarWidth('data1', 1)).toEqual(15);
            expect(getBarWidth('data2', 1)).toEqual(15);
            expect(getBarWidth('data3', 1)).toEqual(15);
            expect(getBarWidth('data1', 2)).toEqual(15);
            expect(getBarWidth('data2', 2)).toEqual(15);
            expect(getBarWidth('data3', 2)).toEqual(15);

            // all offsets should be the same
            expect(getBarOffset('data1', 'data2', 0)).toEqual(15);
            expect(getBarOffset('data2', 'data3', 0)).toEqual(15);
            expect(getBarOffset('data1', 'data2', 1)).toEqual(15);
            expect(getBarOffset('data2', 'data3', 1)).toEqual(15);
            expect(getBarOffset('data1', 'data2', 2)).toEqual(15);
            expect(getBarOffset('data2', 'data3', 2)).toEqual(15);

            // expect the container to shrink a little because of
            // the offsets from the first/last chart
            expect(getBarContainerWidth()).toEqual(396 - 15);
            expect(getBarContainerOffset()).toEqual(31 + parseInt(15 / 2));
        });
    });
});