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1 | /** |
2 | * @fileoverview Regression test for a bug involving data update while panning. | |
3 | * | |
4 | * See http://stackoverflow.com/questions/9528173 | |
5 | * | |
6 | * @author dan@dygraphs.com (Dan Vanderkam) | |
7 | */ | |
89fdcedb | 8 | describe("update-while-panning", function() { |
97583b90 | 9 | |
89fdcedb | 10 | beforeEach(function() { |
97583b90 | 11 | document.body.innerHTML = "<div id='graph'></div>"; |
89fdcedb | 12 | }); |
97583b90 | 13 | |
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14 | afterEach(function() { |
15 | }); | |
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16 | |
17 | // This tests the following sequence: | |
18 | // 1. Begin dragging a chart (x-panning) | |
19 | // 2. Do a data update (updateOptions({file: ...})) | |
20 | // 3. Verify that the y-axis is still well-defined. | |
89fdcedb | 21 | it('testUpdateWhilePanning', function() { |
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22 | var sinewave = function(start, limit, step) { |
23 | var data = []; | |
24 | for (var x = start; x < limit; x += step) { | |
25 | data.push([x, Math.sin(x)]); | |
26 | } | |
27 | return data; | |
28 | }; | |
29 | ||
30 | var opts = { | |
31 | width: 480, | |
32 | height: 320, | |
33 | valueRange: [-2, 2] | |
34 | }; | |
35 | ||
36 | var graph = document.getElementById("graph"); | |
37 | ||
38 | var g = new Dygraph(graph, sinewave(0, 6, 0.1), opts); | |
89fdcedb | 39 | assert.deepEqual([-2, 2], g.yAxisRange()); |
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40 | |
41 | // Start a pan, but don't finish it yet. | |
42 | DygraphOps.dispatchMouseDown_Point(g, 200, 100, {shiftKey: true}); | |
43 | DygraphOps.dispatchMouseMove_Point(g, 100, 100, {shiftKey: true}); | |
89fdcedb | 44 | assert.deepEqual([-2, 2], g.yAxisRange()); |
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45 | |
46 | // Now do a data update. y-axis should remain the same. | |
47 | g.updateOptions({file: sinewave(0, 7, 0.1)}); | |
89fdcedb | 48 | assert.deepEqual([-2, 2], g.yAxisRange()); |
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49 | |
50 | // Keep the pan going. | |
51 | DygraphOps.dispatchMouseMove_Point(g, 50, 100, {shiftKey: true}); | |
89fdcedb | 52 | assert.deepEqual([-2, 2], g.yAxisRange()); |
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53 | |
54 | // Now finish the pan. | |
55 | DygraphOps.dispatchMouseUp_Point(g, 100, 100, {shiftKey: true}); | |
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56 | assert.deepEqual([-2, 2], g.yAxisRange()); |
57 | }); | |
97583b90 | 58 | |
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59 | |
60 | }); |