Add comment to resize test case as a follow on to pull request 260.
[dygraphs.git] / auto_tests / tests / simple_drawing.js
1 // Copyright (c) 2011 Google, Inc.
2 //
3 // Permission is hereby granted, free of charge, to any person obtaining a copy
4 // of this software and associated documentation files (the "Software"), to deal
5 // in the Software without restriction, including without limitation the rights
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7 // copies of the Software, and to permit persons to whom the Software is
8 // furnished to do so, subject to the following conditions:
9 //
10 // The above copyright notice and this permission notice shall be included in
11 // all copies or substantial portions of the Software.
12 //
13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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18 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
19 // THE SOFTWARE.
20
21 /**
22 * @fileoverview Test cases for drawing simple lines.
23 *
24 * @author konigsberg@google.com (Robert Konigsberg)
25 */
26 var ZERO_TO_FIFTY = [[ 10, 0 ] , [ 20, 50 ]];
27
28 var SimpleDrawingTestCase = TestCase("simple-drawing");
29
30 SimpleDrawingTestCase._origFunc = Dygraph.getContext;
31 SimpleDrawingTestCase.prototype.setUp = function() {
32 document.body.innerHTML = "<div id='graph'></div>";
33 Dygraph.getContext = function(canvas) {
34 return new Proxy(SimpleDrawingTestCase._origFunc(canvas));
35 }
36 };
37
38 SimpleDrawingTestCase.prototype.tearDown = function() {
39 Dygraph.getContext = SimpleDrawingTestCase._origFunc;
40 };
41
42 SimpleDrawingTestCase.prototype.testDrawSimpleRangePlusOne = function() {
43 var opts = {
44 drawXGrid: false,
45 drawYGrid: false,
46 drawXAxis: false,
47 drawYAxis: false,
48 valueRange: [0,51] }
49
50 var graph = document.getElementById("graph");
51 var g = new Dygraph(graph, ZERO_TO_FIFTY, opts);
52 var htx = g.hidden_ctx_;
53
54 CanvasAssertions.assertLineDrawn(htx, [0,320], [475,6.2745], {
55 strokeStyle: "#008080",
56 lineWidth: 1
57 });
58 g.destroy(); // to balance context saves and destroys.
59 CanvasAssertions.assertBalancedSaveRestore(htx);
60 };
61
62 // See http://code.google.com/p/dygraphs/issues/detail?id=185
63 SimpleDrawingTestCase.prototype.testDrawSimpleRangeZeroToFifty = function() {
64 var opts = {
65 drawXGrid: false,
66 drawYGrid: false,
67 drawXAxis: false,
68 drawYAxis: false,
69 valueRange: [0,50] }
70
71 var graph = document.getElementById("graph");
72 var g = new Dygraph(graph, ZERO_TO_FIFTY, opts);
73 var htx = g.hidden_ctx_;
74
75 var lines = CanvasAssertions.getLinesDrawn(htx, {
76 strokeStyle: "#008080",
77 lineWidth: 1
78 });
79 assertEquals(1, lines.length);
80 g.destroy(); // to balance context saves and destroys.
81 CanvasAssertions.assertBalancedSaveRestore(htx);
82 };
83
84 SimpleDrawingTestCase.prototype.testDrawWithAxis = function() {
85 var graph = document.getElementById("graph");
86 var g = new Dygraph(graph, ZERO_TO_FIFTY);
87
88 var htx = g.hidden_ctx_;
89 g.destroy(); // to balance context saves and destroys.
90 CanvasAssertions.assertBalancedSaveRestore(htx);
91 };
92
93 /**
94 * Tests that it is drawing dashes, and it remember the dash history between
95 * points.
96 */
97 SimpleDrawingTestCase.prototype.testDrawSimpleDash = function() {
98 var opts = {
99 drawXGrid: false,
100 drawYGrid: false,
101 drawXAxis: false,
102 drawYAxis: false,
103 'Y1': {strokePattern: [25, 7, 7, 7]},
104 colors: ['#ff0000']
105 };
106
107 var graph = document.getElementById("graph");
108 // Set the dims so we pass if default changes.
109 graph.style.width='480px';
110 graph.style.height='320px';
111 var g = new Dygraph(graph, [[1, 4], [2, 5], [3, 3], [4, 7], [5, 9]], opts);
112 htx = g.hidden_ctx_;
113
114 // TODO(danvk): figure out a good way to restore this test.
115 // assertEquals(29, CanvasAssertions.numLinesDrawn(htx, "#ff0000"));
116 g.destroy(); // to balance context saves and destroys.
117 CanvasAssertions.assertBalancedSaveRestore(htx);
118 };
119
120 /**
121 * Tests that thick lines are drawn continuously.
122 * Regression test for http://code.google.com/p/dygraphs/issues/detail?id=328
123 */
124 SimpleDrawingTestCase.prototype.testDrawThickLine = function() {
125 var opts = {
126 drawXGrid: false,
127 drawYGrid: false,
128 drawXAxis: false,
129 drawYAxis: false,
130 strokeWidth: 15,
131 colors: ['#ff0000']
132 };
133
134 var graph = document.getElementById("graph");
135 // Set the dims so we pass if default changes.
136 graph.style.width='480px';
137 graph.style.height='320px';
138 var g = new Dygraph(graph, [[1, 2], [2, 5], [3, 2], [4, 7], [5, 0]], opts);
139 htx = g.hidden_ctx_;
140
141 // There's a big gap in the line at (2, 5)
142 // If the bug is fixed, then there should be some red going up from here.
143 var xy = g.toDomCoords(2, 5);
144 var x = Math.round(xy[0]), y = Math.round(xy[1]);
145
146 var sampler = new PixelSampler(g);
147 assertEquals([255,0,0,255], sampler.colorAtPixel(x, y));
148 assertEquals([255,0,0,255], sampler.colorAtPixel(x, y - 1));
149 assertEquals([255,0,0,255], sampler.colorAtPixel(x, y - 2));
150
151 // TODO(danvk): figure out a good way to restore this test.
152 // assertEquals(29, CanvasAssertions.numLinesDrawn(htx, "#ff0000"));
153 g.destroy(); // to balance context saves and destroys.
154 CanvasAssertions.assertBalancedSaveRestore(htx);
155 };