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WebRoot/node_modules/chart.js/test/jasmine.context.js

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+// Code from http://stackoverflow.com/questions/4406864/html-canvas-unit-testing
+var Context = function() {
+	this._calls = []; // names/args of recorded calls
+	this._initMethods();
+
+	this._fillStyle = null;
+	this._lineCap = null;
+	this._lineDashOffset = null;
+	this._lineJoin = null;
+	this._lineWidth = null;
+	this._strokeStyle = null;
+
+	// Define properties here so that we can record each time they are set
+	Object.defineProperties(this, {
+		fillStyle: {
+			get: function() {
+				return this._fillStyle;
+			},
+			set: function(style) {
+				this._fillStyle = style;
+				this.record('setFillStyle', [style]);
+			}
+		},
+		lineCap: {
+			get: function() {
+				return this._lineCap;
+			},
+			set: function(cap) {
+				this._lineCap = cap;
+				this.record('setLineCap', [cap]);
+			}
+		},
+		lineDashOffset: {
+			get: function() {
+				return this._lineDashOffset;
+			},
+			set: function(offset) {
+				this._lineDashOffset = offset;
+				this.record('setLineDashOffset', [offset]);
+			}
+		},
+		lineJoin: {
+			get: function() {
+				return this._lineJoin;
+			},
+			set: function(join) {
+				this._lineJoin = join;
+				this.record('setLineJoin', [join]);
+			}
+		},
+		lineWidth: {
+			get: function() {
+				return this._lineWidth;
+			},
+			set: function(width) {
+				this._lineWidth = width;
+				this.record('setLineWidth', [width]);
+			}
+		},
+		strokeStyle: {
+			get: function() {
+				return this._strokeStyle;
+			},
+			set: function(style) {
+				this._strokeStyle = style;
+				this.record('setStrokeStyle', [style]);
+			}
+		},
+	});
+};
+
+Context.prototype._initMethods = function() {
+	// define methods to test here
+	// no way to introspect so we have to do some extra work :(
+	var me = this;
+	var methods = {
+		arc: function() {},
+		beginPath: function() {},
+		bezierCurveTo: function() {},
+		clearRect: function() {},
+		closePath: function() {},
+		fill: function() {},
+		fillRect: function() {},
+		fillText: function() {},
+		lineTo: function() {},
+		measureText: function(text) {
+			// return the number of characters * fixed size
+			return text ? {width: text.length * 10} : {width: 0};
+		},
+		moveTo: function() {},
+		quadraticCurveTo: function() {},
+		rect: function() {},
+		restore: function() {},
+		rotate: function() {},
+		save: function() {},
+		setLineDash: function() {},
+		stroke: function() {},
+		strokeRect: function() {},
+		setTransform: function() {},
+		translate: function() {},
+	};
+
+	Object.keys(methods).forEach(function(name) {
+		me[name] = function() {
+			me.record(name, arguments);
+			return methods[name].apply(me, arguments);
+		};
+	});
+};
+
+Context.prototype.record = function(methodName, args) {
+	this._calls.push({
+		name: methodName,
+		args: Array.prototype.slice.call(args)
+	});
+};
+
+Context.prototype.getCalls = function() {
+	return this._calls;
+};
+
+Context.prototype.resetCalls = function() {
+	this._calls = [];
+};
+
+module.exports = Context;