controller.doughnut.tests.js

describe('Chart.controllers.doughnut', function() {
  describe('auto', jasmine.fixture.specs('controller.doughnut'));

  it('should be registered as dataset controller', function() {
    expect(typeof Chart.controllers.doughnut).toBe('function');
    expect(typeof Chart.controllers.pie).toBe('function');
  });

  it('should be constructed', function() {
    var chart = window.acquireChart({
      type: 'doughnut',
      data: {
        datasets: [{
          data: []
        }],
        labels: []
      }
    });

    var meta = chart.getDatasetMeta(0);
    expect(meta.type).toBe('doughnut');
    expect(meta.controller).not.toBe(undefined);
    expect(meta.controller.index).toBe(0);
    expect(meta.data).toEqual([]);

    meta.controller.updateIndex(1);
    expect(meta.controller.index).toBe(1);
  });

  it('should create arc elements for each data item during initialization', function() {
    var chart = window.acquireChart({
      type: 'doughnut',
      data: {
        datasets: [{
          data: [10, 15, 0, 4]
        }],
        labels: []
      }
    });

    var meta = chart.getDatasetMeta(0);
    expect(meta.data.length).toBe(4); // 4 arcs created
    expect(meta.data[0] instanceof Chart.elements.ArcElement).toBe(true);
    expect(meta.data[1] instanceof Chart.elements.ArcElement).toBe(true);
    expect(meta.data[2] instanceof Chart.elements.ArcElement).toBe(true);
    expect(meta.data[3] instanceof Chart.elements.ArcElement).toBe(true);
  });

  it ('should reset and update elements', function() {
    var chart = window.acquireChart({
      type: 'doughnut',
      data: {
        datasets: [{
          data: [1, 2, 3, 4],
          hidden: true
        }, {
          data: [5, 6, 0, 7]
        }, {
          data: [8, 9, 10, 11]
        }],
        labels: ['label0', 'label1', 'label2', 'label3']
      },
      options: {
        plugins: {
          legend: false,
          title: false,
        },
        animation: {
          duration: 0,
          animateRotate: true,
          animateScale: false
        },
        cutout: '50%',
        rotation: 0,
        circumference: 360,
        elements: {
          arc: {
            backgroundColor: 'rgb(255, 0, 0)',
            borderColor: 'rgb(0, 0, 255)',
            borderWidth: 2
          }
        }
      }
    });

    var meta = chart.getDatasetMeta(1);

    meta.controller.reset(); // reset first

    expect(meta.data.length).toBe(4);

    [
      {c: 0},
      {c: 0},
      {c: 0},
      {c: 0}
    ].forEach(function(expected, i) {
      expect(meta.data[i].x).toBeCloseToPixel(256);
      expect(meta.data[i].y).toBeCloseToPixel(256);
      expect(meta.data[i].outerRadius).toBeCloseToPixel(256);
      expect(meta.data[i].innerRadius).toBeCloseToPixel(192);
      expect(meta.data[i].circumference).toBeCloseTo(expected.c, 8);
      expect(meta.data[i].startAngle).toBeCloseToPixel(Math.PI * -0.5);
      expect(meta.data[i].endAngle).toBeCloseToPixel(Math.PI * -0.5);
      expect(meta.data[i].options).toEqual(jasmine.objectContaining({
        backgroundColor: 'rgb(255, 0, 0)',
        borderColor: 'rgb(0, 0, 255)',
        borderWidth: 2
      }));
    });

    chart.update();

    [
      {c: 1.7453292519, s: -1.5707963267, e: 0.1745329251},
      {c: 2.0943951023, s: 0.1745329251, e: 2.2689280275},
      {c: 0, s: 2.2689280275, e: 2.2689280275},
      {c: 2.4434609527, s: 2.2689280275, e: 4.7123889803}
    ].forEach(function(expected, i) {
      expect(meta.data[i].x).toBeCloseToPixel(256);
      expect(meta.data[i].y).toBeCloseToPixel(256);
      expect(meta.data[i].outerRadius).toBeCloseToPixel(256);
      expect(meta.data[i].innerRadius).toBeCloseToPixel(192);
      expect(meta.data[i].circumference).toBeCloseTo(expected.c, 8);
      expect(meta.data[i].startAngle).toBeCloseTo(expected.s, 8);
      expect(meta.data[i].endAngle).toBeCloseTo(expected.e, 8);
      expect(meta.data[i].options).toEqual(jasmine.objectContaining({
        backgroundColor: 'rgb(255, 0, 0)',
        borderColor: 'rgb(0, 0, 255)',
        borderWidth: 2
      }));
    });

    // Change the amount of data and ensure that arcs are updated accordingly
    chart.data.datasets[1].data = [1, 2]; // remove 2 elements from dataset 0
    chart.update();

    expect(meta.data.length).toBe(2);
    expect(meta.data[0] instanceof Chart.elements.ArcElement).toBe(true);
    expect(meta.data[1] instanceof Chart.elements.ArcElement).toBe(true);

    // Add data
    chart.data.datasets[1].data = [1, 2, 3, 4];
    chart.update();

    expect(meta.data.length).toBe(4);
    expect(meta.data[0] instanceof Chart.elements.ArcElement).toBe(true);
    expect(meta.data[1] instanceof Chart.elements.ArcElement).toBe(true);
    expect(meta.data[2] instanceof Chart.elements.ArcElement).toBe(true);
    expect(meta.data[3] instanceof Chart.elements.ArcElement).toBe(true);
  });

  it ('should rotate and limit circumference', function() {
    var chart = window.acquireChart({
      type: 'doughnut',
      data: {
        datasets: [{
          data: [2, 4],
          hidden: true
        }, {
          data: [1, 3]
        }, {
          data: [1, 0]
        }],
        labels: ['label0', 'label1', 'label2']
      },
      options: {
        plugins: {
          legend: false,
          title: false,
        },
        cutout: '50%',
        rotation: 270,
        circumference: 90,
        elements: {
          arc: {
            backgroundColor: 'rgb(255, 0, 0)',
            borderColor: 'rgb(0, 0, 255)',
            borderWidth: 2
          }
        }
      }
    });

    var meta = chart.getDatasetMeta(1);

    expect(meta.data.length).toBe(2);

    // Only startAngle, endAngle and circumference should be different.
    [
      {c: Math.PI / 8, s: Math.PI, e: Math.PI + Math.PI / 8},
      {c: 3 * Math.PI / 8, s: Math.PI + Math.PI / 8, e: Math.PI + Math.PI / 2}
    ].forEach(function(expected, i) {
      expect(meta.data[i].x).toBeCloseToPixel(512);
      expect(meta.data[i].y).toBeCloseToPixel(512);
      expect(meta.data[i].outerRadius).toBeCloseToPixel(512);
      expect(meta.data[i].innerRadius).toBeCloseToPixel(384);
      expect(meta.data[i].circumference).toBeCloseTo(expected.c, 8);
      expect(meta.data[i].startAngle).toBeCloseTo(expected.s, 8);
      expect(meta.data[i].endAngle).toBeCloseTo(expected.e, 8);
    });
  });

  it('should treat negative values as positive', function() {
    var chart = window.acquireChart({
      type: 'doughnut',
      data: {
        datasets: [{
          data: [-1, -3]
        }],
        labels: ['label0', 'label1']
      },
      options: {
        plugins: {
          legend: false,
          title: false
        },
        cutout: '50%',
        rotation: 270,
        circumference: 90,
        elements: {
          arc: {
            backgroundColor: 'rgb(255, 0, 0)',
            borderColor: 'rgb(0, 0, 255)',
            borderWidth: 2
          }
        }
      }
    });

    var meta = chart.getDatasetMeta(0);

    expect(meta.data.length).toBe(2);

    // Only startAngle, endAngle and circumference should be different.
    [
      {c: Math.PI / 8, s: Math.PI, e: Math.PI + Math.PI / 8},
      {c: 3 * Math.PI / 8, s: Math.PI + Math.PI / 8, e: Math.PI + Math.PI / 2}
    ].forEach(function(expected, i) {
      expect(meta.data[i].circumference).toBeCloseTo(expected.c, 8);
      expect(meta.data[i].startAngle).toBeCloseTo(expected.s, 8);
      expect(meta.data[i].endAngle).toBeCloseTo(expected.e, 8);
    });
  });

  it ('should draw all arcs', function() {
    var chart = window.acquireChart({
      type: 'doughnut',
      data: {
        datasets: [{
          data: [10, 15, 0, 4]
        }],
        labels: ['label0', 'label1', 'label2', 'label3']
      }
    });

    var meta = chart.getDatasetMeta(0);

    spyOn(meta.data[0], 'draw');
    spyOn(meta.data[1], 'draw');
    spyOn(meta.data[2], 'draw');
    spyOn(meta.data[3], 'draw');

    chart.update();

    expect(meta.data[0].draw.calls.count()).toBe(1);
    expect(meta.data[1].draw.calls.count()).toBe(1);
    expect(meta.data[2].draw.calls.count()).toBe(1);
    expect(meta.data[3].draw.calls.count()).toBe(1);
  });

  it ('should calculate radiuses based on the border widths of the visible outermost dataset', function() {
    var chart = window.acquireChart({
      type: 'doughnut',
      data: {
        datasets: [{
          data: [2, 4],
          borderWidth: 4,
          hidden: true
        }, {
          data: [1, 3],
          borderWidth: 8
        }, {
          data: [1, 0],
          borderWidth: 12
        }],
        labels: ['label0', 'label1']
      },
      options: {
        plugins: {
          legend: false,
          title: false
        }
      }
    });

    chart.update();

    var controller = chart.getDatasetMeta(0).controller;
    expect(chart.chartArea.bottom - chart.chartArea.top).toBe(512);

    expect(controller.getMaxBorderWidth()).toBe(8);
    expect(controller.outerRadius).toBe(252);
    expect(controller.innerRadius).toBe(189);

    controller = chart.getDatasetMeta(1).controller;
    expect(controller.getMaxBorderWidth()).toBe(8);
    expect(controller.outerRadius).toBe(252);
    expect(controller.innerRadius).toBe(189);

    controller = chart.getDatasetMeta(2).controller;
    expect(controller.getMaxBorderWidth()).toBe(8);
    expect(controller.outerRadius).toBe(189);
    expect(controller.innerRadius).toBe(126);
  });

  describe('Interactions', function() {
    beforeEach(function() {
      this.chart = window.acquireChart({
        type: 'doughnut',
        data: {
          labels: ['label1', 'label2', 'label3', 'label4'],
          datasets: [{
            data: [10, 15, 0, 4]
          }]
        },
        options: {
          cutout: '50%',
          elements: {
            arc: {
              backgroundColor: 'rgb(100, 150, 200)',
              borderColor: 'rgb(50, 100, 150)',
              borderWidth: 2,
            }
          }
        }
      });
    });

    it ('should handle default hover styles', async function() {
      var chart = this.chart;
      var arc = chart.getDatasetMeta(0).data[0];

      await jasmine.triggerMouseEvent(chart, 'mousemove', arc);
      expect(arc.options.backgroundColor).toBe('#3187DD');
      expect(arc.options.borderColor).toBe('#175A9D');
      expect(arc.options.borderWidth).toBe(2);

      await jasmine.triggerMouseEvent(chart, 'mouseout', arc);
      expect(arc.options.backgroundColor).toBe('rgb(100, 150, 200)');
      expect(arc.options.borderColor).toBe('rgb(50, 100, 150)');
      expect(arc.options.borderWidth).toBe(2);
    });

    it ('should handle hover styles defined via dataset properties', async function() {
      var chart = this.chart;
      var arc = chart.getDatasetMeta(0).data[0];

      Chart.helpers.merge(chart.data.datasets[0], {
        hoverBackgroundColor: 'rgb(200, 100, 150)',
        hoverBorderColor: 'rgb(150, 50, 100)',
        hoverBorderWidth: 8.4,
      });

      chart.update();

      await jasmine.triggerMouseEvent(chart, 'mousemove', arc);
      expect(arc.options.backgroundColor).toBe('rgb(200, 100, 150)');
      expect(arc.options.borderColor).toBe('rgb(150, 50, 100)');
      expect(arc.options.borderWidth).toBe(8.4);

      await jasmine.triggerMouseEvent(chart, 'mouseout', arc);
      expect(arc.options.backgroundColor).toBe('rgb(100, 150, 200)');
      expect(arc.options.borderColor).toBe('rgb(50, 100, 150)');
      expect(arc.options.borderWidth).toBe(2);
    });

    it ('should handle hover styles defined via element options', async function() {
      var chart = this.chart;
      var arc = chart.getDatasetMeta(0).data[0];

      Chart.helpers.merge(chart.options.elements.arc, {
        hoverBackgroundColor: 'rgb(200, 100, 150)',
        hoverBorderColor: 'rgb(150, 50, 100)',
        hoverBorderWidth: 8.4,
      });

      chart.update();

      await jasmine.triggerMouseEvent(chart, 'mousemove', arc);
      expect(arc.options.backgroundColor).toBe('rgb(200, 100, 150)');
      expect(arc.options.borderColor).toBe('rgb(150, 50, 100)');
      expect(arc.options.borderWidth).toBe(8.4);

      await jasmine.triggerMouseEvent(chart, 'mouseout', arc);
      expect(arc.options.backgroundColor).toBe('rgb(100, 150, 200)');
      expect(arc.options.borderColor).toBe('rgb(50, 100, 150)');
      expect(arc.options.borderWidth).toBe(2);
    });
  });

  it('should not override tooltip title and label callbacks', async() => {
    const chart = window.acquireChart({
      type: 'doughnut',
      data: {
        labels: ['Label 1', 'Label 2'],
        datasets: [{
          data: [21, 79],
          label: 'Dataset 1'
        }, {
          data: [33, 67],
          label: 'Dataset 2'
        }]
      },
      options: {
        responsive: true,
        maintainAspectRatio: true,
      }
    });
    const {tooltip} = chart;
    const point = chart.getDatasetMeta(0).data[0];

    await jasmine.triggerMouseEvent(chart, 'mousemove', point);

    expect(tooltip.title).toEqual(['Label 1']);
    expect(tooltip.body).toEqual([{
      before: [],
      lines: ['Dataset 1: 21'],
      after: []
    }]);

    chart.options.plugins.tooltip = {mode: 'dataset'};
    chart.update();
    await jasmine.triggerMouseEvent(chart, 'mousemove', point);

    expect(tooltip.title).toEqual(['Dataset 1']);
    expect(tooltip.body).toEqual([{
      before: [],
      lines: ['Label 1: 21'],
      after: []
    }, {
      before: [],
      lines: ['Label 2: 79'],
      after: []
    }]);
  });
});