GeometrySpec.js

describe("Geometry", function() {
    beforeEach(function() {
        var $canvasContainer = $('<div><canvas width="400", height="400" style="border: 1px solid gray"></canvas></div>').appendTo('body');
        jasmine.getEnv().currentSpec.canvasContainer = $canvasContainer;
        jasmine.getEnv().currentSpec.renderCanvas = true;
        $canvas = $canvasContainer.find('canvas');
        g = Geometry;
        g.ctx = $canvas[0].getContext('2d');
    });

    describe("Lines", function() {
        it("can check lines are parallel", function() {

        });

        it("can check lines are coincident", function() {
            // remove the canvas instead of appending it to the report output
            this.renderCanvas = false;
        });
    });
});

jasmin-html.js

jasmine.HtmlReporter.SpecView.prototype.appendSummaryToSuiteDiv = function() {
  this.summary.className += ' ' + this.status();

    if(this.spec.canvasContainer){
        if(this.spec.renderCanvas){
            this.spec.canvasContainer.appendTo(this.summary);
        } else {
            this.spec.canvasContainer.remove();
        }
    }
  this.appendToSummary(this.spec, this.summary);
};