text: 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(Chart.controllers.doughnut).toBe(Chart.controllers.pie);
  	});
  
  	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 rectangles created
  		expect(meta.data[0] instanceof Chart.elements.Arc).toBe(true);
  		expect(meta.data[1] instanceof Chart.elements.Arc).toBe(true);
  		expect(meta.data[2] instanceof Chart.elements.Arc).toBe(true);
  		expect(meta.data[3] instanceof Chart.elements.Arc).toBe(true);
  	});
  
  	it('should set the innerRadius to 0 if the config option is 0', function() {
  		var chart = window.acquireChart({
  			type: 'pie',
  			data: {
  				datasets: [{
  					data: [10, 15, 0, 4]
  				}],
  				labels: []
  			}
  		});
  
  		expect(chart.innerRadius).toBe(0);
  	});
  
  	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: {
  				legend: false,
  				title: false,
  				animation: {
  					animateRotate: true,
  					animateScale: false
  				},
  				cutoutPercentage: 50,
  				rotation: Math.PI * -0.5,
  				circumference: Math.PI * 2.0,
  				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]._model.x).toBeCloseToPixel(256);
  			expect(meta.data[i]._model.y).toBeCloseToPixel(256);
  			expect(meta.data[i]._model.outerRadius).toBeCloseToPixel(256);
  			expect(meta.data[i]._model.innerRadius).toBeCloseToPixel(192);
  			expect(meta.data[i]._model.circumference).toBeCloseTo(expected.c, 8);
  			expect(meta.data[i]._model).toEqual(jasmine.objectContaining({
  				startAngle: Math.PI * -0.5,
  				endAngle: Math.PI * -0.5,
  				label: chart.data.labels[i],
  				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]._model.x).toBeCloseToPixel(256);
  			expect(meta.data[i]._model.y).toBeCloseToPixel(256);
  			expect(meta.data[i]._model.outerRadius).toBeCloseToPixel(256);
  			expect(meta.data[i]._model.innerRadius).toBeCloseToPixel(192);
  			expect(meta.data[i]._model.circumference).toBeCloseTo(expected.c, 8);
  			expect(meta.data[i]._model.startAngle).toBeCloseTo(expected.s, 8);
  			expect(meta.data[i]._model.endAngle).toBeCloseTo(expected.e, 8);
  			expect(meta.data[i]._model).toEqual(jasmine.objectContaining({
  				label: chart.data.labels[i],
  				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.Arc).toBe(true);
  		expect(meta.data[1] instanceof Chart.elements.Arc).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.Arc).toBe(true);
  		expect(meta.data[1] instanceof Chart.elements.Arc).toBe(true);
  		expect(meta.data[2] instanceof Chart.elements.Arc).toBe(true);
  		expect(meta.data[3] instanceof Chart.elements.Arc).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']
  			},
  			options: {
  				legend: false,
  				title: false,
  				cutoutPercentage: 50,
  				rotation: Math.PI,
  				circumference: Math.PI * 0.5,
  				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]._model.x).toBeCloseToPixel(512);
  			expect(meta.data[i]._model.y).toBeCloseToPixel(512);
  			expect(meta.data[i]._model.outerRadius).toBeCloseToPixel(512);
  			expect(meta.data[i]._model.innerRadius).toBeCloseToPixel(384);
  			expect(meta.data[i]._model.circumference).toBeCloseTo(expected.c, 8);
  			expect(meta.data[i]._model.startAngle).toBeCloseTo(expected.s, 8);
  			expect(meta.data[i]._model.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: {
  				legend: false,
  				title: false,
  				cutoutPercentage: 50,
  				rotation: Math.PI,
  				circumference: Math.PI * 0.5,
  				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]._model.circumference).toBeCloseTo(expected.c, 8);
  			expect(meta.data[i]._model.startAngle).toBeCloseTo(expected.s, 8);
  			expect(meta.data[i]._model.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: {
  				legend: false,
  				title: false
  			}
  		});
  
  		chart.update();
  
  		expect(chart.chartArea.bottom - chart.chartArea.top).toBe(512);
  		expect(chart.borderWidth).toBe(8);
  		expect(chart.outerRadius).toBe(252);
  		expect(chart.innerRadius).toBe(126);
  		expect(chart.radiusLength).toBe(63);
  
  		var controller = chart.getDatasetMeta(0).controller;
  		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: {
  					cutoutPercentage: 0,
  					elements: {
  						arc: {
  							backgroundColor: 'rgb(100, 150, 200)',
  							borderColor: 'rgb(50, 100, 150)',
  							borderWidth: 2,
  						}
  					}
  				}
  			});
  		});
  
  		it ('should handle default hover styles', function() {
  			var chart = this.chart;
  			var arc = chart.getDatasetMeta(0).data[0];
  
  			jasmine.triggerMouseEvent(chart, 'mousemove', arc);
  			expect(arc._model.backgroundColor).toBe('rgb(49, 135, 221)');
  			expect(arc._model.borderColor).toBe('rgb(22, 89, 156)');
  			expect(arc._model.borderWidth).toBe(2);
  
  			jasmine.triggerMouseEvent(chart, 'mouseout', arc);
  			expect(arc._model.backgroundColor).toBe('rgb(100, 150, 200)');
  			expect(arc._model.borderColor).toBe('rgb(50, 100, 150)');
  			expect(arc._model.borderWidth).toBe(2);
  		});
  
  		it ('should handle hover styles defined via dataset properties', 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();
  
  			jasmine.triggerMouseEvent(chart, 'mousemove', arc);
  			expect(arc._model.backgroundColor).toBe('rgb(200, 100, 150)');
  			expect(arc._model.borderColor).toBe('rgb(150, 50, 100)');
  			expect(arc._model.borderWidth).toBe(8.4);
  
  			jasmine.triggerMouseEvent(chart, 'mouseout', arc);
  			expect(arc._model.backgroundColor).toBe('rgb(100, 150, 200)');
  			expect(arc._model.borderColor).toBe('rgb(50, 100, 150)');
  			expect(arc._model.borderWidth).toBe(2);
  		});
  
  		it ('should handle hover styles defined via element options', 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();
  
  			jasmine.triggerMouseEvent(chart, 'mousemove', arc);
  			expect(arc._model.backgroundColor).toBe('rgb(200, 100, 150)');
  			expect(arc._model.borderColor).toBe('rgb(150, 50, 100)');
  			expect(arc._model.borderWidth).toBe(8.4);
  
  			jasmine.triggerMouseEvent(chart, 'mouseout', arc);
  			expect(arc._model.backgroundColor).toBe('rgb(100, 150, 200)');
  			expect(arc._model.borderColor).toBe('rgb(50, 100, 150)');
  			expect(arc._model.borderWidth).toBe(2);
  		});
  
  		it ('should handle hover styles defined via element custom', function() {
  			var chart = this.chart;
  			var arc = chart.getDatasetMeta(0).data[0];
  
  			arc.custom = {
  				hoverBackgroundColor: 'rgb(200, 100, 150)',
  				hoverBorderColor: 'rgb(150, 50, 100)',
  				hoverBorderWidth: 8.4,
  			};
  
  			chart.update();
  
  			jasmine.triggerMouseEvent(chart, 'mousemove', arc);
  			expect(arc._model.backgroundColor).toBe('rgb(200, 100, 150)');
  			expect(arc._model.borderColor).toBe('rgb(150, 50, 100)');
  			expect(arc._model.borderWidth).toBe(8.4);
  
  			jasmine.triggerMouseEvent(chart, 'mouseout', arc);
  			expect(arc._model.backgroundColor).toBe('rgb(100, 150, 200)');
  			expect(arc._model.borderColor).toBe('rgb(50, 100, 150)');
  			expect(arc._model.borderWidth).toBe(2);
  		});
  	});
  });
  