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'use strict';
describe('Chart.helpers.canvas', function() {
var helpers = Chart.helpers;
describe('clear', function() {
it('should clear the chart canvas', function() {
var chart = acquireChart({}, {
canvas: {
style: 'width: 150px; height: 245px'
}
});
spyOn(chart.ctx, 'clearRect');
helpers.canvas.clear(chart);
expect(chart.ctx.clearRect.calls.count()).toBe(1);
expect(chart.ctx.clearRect.calls.first().object).toBe(chart.ctx);
expect(chart.ctx.clearRect.calls.first().args).toEqual([0, 0, 150, 245]);
});
});
describe('roundedRect', function() {
it('should create a rounded rectangle path', function() {
var context = window.createMockContext();
helpers.canvas.roundedRect(context, 10, 20, 30, 40, 5);
expect(context.getCalls()).toEqual([
{name: 'moveTo', args: [15, 20]},
{name: 'lineTo', args: [35, 20]},
{name: 'arcTo', args: [40, 20, 40, 25, 5]},
{name: 'lineTo', args: [40, 55]},
{name: 'arcTo', args: [40, 60, 35, 60, 5]},
{name: 'lineTo', args: [15, 60]},
{name: 'arcTo', args: [10, 60, 10, 55, 5]},
{name: 'lineTo', args: [10, 25]},
{name: 'arcTo', args: [10, 20, 15, 20, 5]},
{name: 'closePath', args: []},
{name: 'moveTo', args: [10, 20]}
]);
});
it('should optimize path if radius is 0', function() {
var context = window.createMockContext();
helpers.canvas.roundedRect(context, 10, 20, 30, 40, 0);
expect(context.getCalls()).toEqual([{name: 'rect', args: [10, 20, 30, 40]}]);
});
});
});