| 1 | /** |
| 2 | * @fileoverview Tests for window.devicePixelRatio > 1. |
| 3 | * |
| 4 | * @author danvdk@gmail.com (Dan Vanderkam) |
| 5 | */ |
| 6 | describe("hidpi", function() { |
| 7 | |
| 8 | var savePixelRatio; |
| 9 | beforeEach(function() { |
| 10 | savePixelRatio = window.devicePixelRatio; |
| 11 | window.devicePixelRatio = 2; |
| 12 | |
| 13 | document.body.innerHTML = "<div id='graph'></div>"; |
| 14 | }); |
| 15 | |
| 16 | afterEach(function() { |
| 17 | window.devicePixelRatio = savePixelRatio; |
| 18 | }); |
| 19 | |
| 20 | it('testDoesntCreateScrollbars', function() { |
| 21 | var sw = document.body.scrollWidth; |
| 22 | var cw = document.body.clientWidth; |
| 23 | |
| 24 | var graph = document.getElementById("graph"); |
| 25 | graph.style.width = "70%"; // more than half. |
| 26 | graph.style.height = "200px"; |
| 27 | |
| 28 | var opts = {}; |
| 29 | var data = "X,Y\n" + |
| 30 | "0,-1\n" + |
| 31 | "1,0\n" + |
| 32 | "2,1\n" + |
| 33 | "3,0\n" |
| 34 | ; |
| 35 | |
| 36 | var g = new Dygraph(graph, data, opts); |
| 37 | |
| 38 | // Adding the graph shouldn't cause the width of the page to change. |
| 39 | // (essentially, we're checking that we don't end up with a scrollbar) |
| 40 | // See http://stackoverflow.com/a/2146905/388951 |
| 41 | assert.equal(cw, document.body.clientWidth); |
| 42 | assert.equal(sw, document.body.scrollWidth); |
| 43 | }); |
| 44 | |
| 45 | |
| 46 | }); |