-fillStepPlotTestCase.prototype.setUp = function() {
- document.body.innerHTML = "<div id='graph'></div>";
- Dygraph.getContext = function(canvas) {
- return new Proxy(fillStepPlotTestCase.origFunc(canvas));
+var origFunc = utils.getContext;
+
+beforeEach(function() {
+ utils.getContext = function(canvas) {
+ return new Proxy(origFunc(canvas));