jnpf-web-datareport/node_modules/chartjs-plugin-datalabels/test/specs/interactions.spec.js

describe('interactions', function() {
	describe('context.active', function() {
		it('should be false for non active elements (default)', function() {
			var options = {color: function() {}};
			var spy = spyOn(options, 'color');

			jasmine.chart.acquire({
				type: 'line',
				data: {
					labels: [1, 2, 3],
					datasets: [{
						data: [1, 2, 3],
						fill: false
					}]
				},
				options: {
					plugins: {
						datalabels: options
					}
				}
			});

			expect(spy.calls.count()).toBe(3);
			expect(spy.calls.argsFor(0)[0].active).toBe(false);
			expect(spy.calls.argsFor(1)[0].active).toBe(false);
			expect(spy.calls.argsFor(2)[0].active).toBe(false);
		});
		it('should be true for active elements', function() {
			var options = {color: function() {}};
			var spy = spyOn(options, 'color');

			var chart = jasmine.chart.acquire({
				type: 'line',
				data: {
					labels: [1, 2, 3],
					datasets: [{
						data: [1, 2, 3],
						fill: false
					}]
				},
				options: {
					plugins: {
						datalabels: options
					}
				}
			});

			spy.calls.reset();

			var ds0 = chart.getDatasetMeta(0);
			jasmine.triggerMouseEvent(chart, 'mousemove', ds0.data[1]);

			expect(spy.calls.count()).toBe(1);
			expect(spy.calls.argsFor(0)[0].active).toBe(true);
			expect(spy.calls.argsFor(0)[0].dataIndex).toBe(1);
			expect(spy.calls.argsFor(0)[0].datasetIndex).toBe(0);
		});
	});

	describe('when the user hover elements', function() {
		it('should not update the whole chart (only render)', function() {
			var chart = jasmine.chart.acquire({
				type: 'line',
				data: {
					labels: [1, 2, 3],
					datasets: [{
						data: [1, 2, 3],
						fill: false
					}]
				}
			});

			spyOn(chart, 'update');
			spyOn(chart, 'render');

			jasmine.triggerMouseEvent(chart, 'mousemove', chart.getDatasetMeta(0).data[1]);

			expect(chart.update).not.toHaveBeenCalled();
			expect(chart.render).toHaveBeenCalled();
		});
		it('should only update active elements (context.active: true)', function() {
			var options = {color: function() {}};
			var spy = spyOn(options, 'color');
			var chart = jasmine.chart.acquire({
				type: 'line',
				data: {
					labels: [1, 2, 3],
					datasets: [{
						data: [1, 2, 3],
						fill: false
					}]
				},
				options: {
					plugins: {
						datalabels: options
					}
				}
			});

			expect(spy.calls.count()).toBe(3);
			spy.calls.reset();

			jasmine.triggerMouseEvent(chart, 'mousemove', chart.getDatasetMeta(0).data[1]);

			expect(spy.calls.count()).toBe(1);
			expect(spy.calls.argsFor(0)[0].active).toBe(true);
			expect(spy.calls.argsFor(0)[0].dataIndex).toBe(1);
			expect(spy.calls.argsFor(0)[0].datasetIndex).toBe(0);
		});
		it('should only update previously active elements (context.active: false)', function() {
			var options = {color: function() {}};
			var spy = spyOn(options, 'color');

			var chart = jasmine.chart.acquire({
				type: 'line',
				data: {
					labels: [1, 2, 3],
					datasets: [{
						data: [1, 2, 3],
						fill: false
					}]
				},
				options: {
					plugins: {
						datalabels: options
					}
				}
			});

			expect(spy.calls.count()).toBe(3);
			spy.calls.reset();

			jasmine.triggerMouseEvent(chart, 'mousemove', chart.getDatasetMeta(0).data[1]);

			expect(spy.calls.count()).toBe(1);
			spy.calls.reset();

			jasmine.triggerMouseEvent(chart, 'mouseout', null);

			expect(spy.calls.count()).toBe(1);
			expect(spy.calls.argsFor(0)[0].active).toBe(false);
			expect(spy.calls.argsFor(0)[0].dataIndex).toBe(1);
			expect(spy.calls.argsFor(0)[0].datasetIndex).toBe(0);
		});
	});
});