projects / extjs.git / blame
| Commit | Line | Data |
|---|---|---|
| 6527f429 DM |
1 | describe('Ext.draw.Point', function () {\r |
| 2 | var proto = Ext.draw.Point.prototype,\r | |
| 3 | precision = 12; // first 12 decimal points should match\r | |
| 4 | \r | |
| 5 | it('should be isPoint', function() {\r | |
| 6 | expect(proto.isPoint).toBeTruthy();\r | |
| 7 | });\r | |
| 8 | \r | |
| 9 | it('should default to using degrees', function () {\r | |
| 10 | expect(proto.angleUnits).toBe('degrees');\r | |
| 11 | });\r | |
| 12 | \r | |
| 13 | describe('constructor', function () {\r | |
| 14 | it('should take two numbers', function () {\r | |
| 15 | var p = new Ext.draw.Point(3, 4);\r | |
| 16 | \r | |
| 17 | expect(p.x).toEqual(3);\r | |
| 18 | expect(p.y).toEqual(4);\r | |
| 19 | });\r | |
| 20 | it('should take a single number', function () {\r | |
| 21 | var p = new Ext.draw.Point(3);\r | |
| 22 | \r | |
| 23 | expect(p.x).toEqual(3);\r | |
| 24 | expect(p.y).toEqual(3);\r | |
| 25 | });\r | |
| 26 | it('should take an array', function () {\r | |
| 27 | var p = new Ext.draw.Point([3, 4]);\r | |
| 28 | \r | |
| 29 | expect(p.x).toEqual(3);\r | |
| 30 | expect(p.y).toEqual(4);\r | |
| 31 | });\r | |
| 32 | it('should take an object', function () {\r | |
| 33 | var p = new Ext.draw.Point({\r | |
| 34 | x: 3,\r | |
| 35 | y: 4\r | |
| 36 | });\r | |
| 37 | \r | |
| 38 | expect(p.x).toEqual(3);\r | |
| 39 | expect(p.y).toEqual(4);\r | |
| 40 | });\r | |
| 41 | it('should take a point', function () {\r | |
| 42 | var p = new Ext.draw.Point(new Ext.draw.Point(3, 4));\r | |
| 43 | \r | |
| 44 | expect(p.x).toEqual(3);\r | |
| 45 | expect(p.y).toEqual(4);\r | |
| 46 | });\r | |
| 47 | it('should calculate polar coordinates', function () {\r | |
| 48 | var p = new Ext.draw.Point(5, 5);\r | |
| 49 | \r | |
| 50 | expect(p.length).toEqual(Math.sqrt(2 * 5 * 5));\r | |
| 51 | expect(p.angle).toEqual(45);\r | |
| 52 | });\r | |
| 53 | });\r | |
| 54 | \r | |
| 55 | describe('set, setX, setY', function () {\r | |
| 56 | it('should recalculate polar coordinates', function () {\r | |
| 57 | var p = new Ext.draw.Point(3, 4);\r | |
| 58 | \r | |
| 59 | p.setX(0);\r | |
| 60 | expect(p.length).toEqual(4);\r | |
| 61 | expect(p.angle).toEqual(90);\r | |
| 62 | p.setY(0);\r | |
| 63 | expect(p.length).toEqual(0);\r | |
| 64 | expect(p.angle).toEqual(0);\r | |
| 65 | p.set(5, 5);\r | |
| 66 | expect(p.length).toEqual(Math.sqrt(2 * 5 * 5));\r | |
| 67 | expect(p.angle).toEqual(45);\r | |
| 68 | });\r | |
| 69 | });\r | |
| 70 | \r | |
| 71 | describe('setPolar, setLength, setAngle', function () {\r | |
| 72 | it('should recalculate cartesian coordinates', function () {\r | |
| 73 | var p = new Ext.draw.Point();\r | |
| 74 | \r | |
| 75 | p.setLength(10);\r | |
| 76 | expect(p.x).toEqual(10);\r | |
| 77 | expect(p.y).toEqual(0);\r | |
| 78 | p.setAngle(90);\r | |
| 79 | expect(p.x).toBeCloseTo(0, precision);\r | |
| 80 | expect(p.y).toBeCloseTo(10, precision);\r | |
| 81 | p.setPolar(45, Math.sqrt(2 * 5 * 5));\r | |
| 82 | expect(p.x).toBeCloseTo(5, precision);\r | |
| 83 | expect(p.y).toBeCloseTo(5, precision);\r | |
| 84 | });\r | |
| 85 | });\r | |
| 86 | \r | |
| 87 | describe('clone', function () {\r | |
| 88 | it('should match original point coordinates but not the point itself', function () {\r | |
| 89 | var p = new Ext.draw.Point(2, 3),\r | |
| 90 | clone = p.clone();\r | |
| 91 | \r | |
| 92 | expect(clone.x).toEqual(p.x);\r | |
| 93 | expect(clone.y).toEqual(p.y);\r | |
| 94 | expect(clone).toNotBe(p);\r | |
| 95 | });\r | |
| 96 | });\r | |
| 97 | \r | |
| 98 | describe('add', function () {\r | |
| 99 | it('should return a new point which x/y values are sums of respective ' +\r | |
| 100 | 'coordinates of this point and the given point', function () {\r | |
| 101 | var p1 = new Ext.draw.Point(2, 3),\r | |
| 102 | p2 = new Ext.draw.Point(-4, 5),\r | |
| 103 | p = p1.add(p2);\r | |
| 104 | \r | |
| 105 | expect(p.x).toEqual(-2);\r | |
| 106 | expect(p.y).toEqual(8);\r | |
| 107 | expect(p).toNotBe(p1);\r | |
| 108 | });\r | |
| 109 | });\r | |
| 110 | \r | |
| 111 | describe('sub', function () {\r | |
| 112 | it('should return a new point which x/y values are the difference between ' +\r | |
| 113 | 'the respective coordinates of this point (minuend) ' +\r | |
| 114 | 'and the given point (subtrahend)', function () {\r | |
| 115 | var p1 = new Ext.draw.Point(2, 3),\r | |
| 116 | p2 = new Ext.draw.Point(-4, 5),\r | |
| 117 | p = p1.sub(p2);\r | |
| 118 | \r | |
| 119 | expect(p.x).toEqual(6);\r | |
| 120 | expect(p.y).toEqual(-2);\r | |
| 121 | expect(p).toNotBe(p1);\r | |
| 122 | });\r | |
| 123 | });\r | |
| 124 | \r | |
| 125 | describe('mul', function () {\r | |
| 126 | it('should return a new point which x/y values are the product of multiplication of ' +\r | |
| 127 | 'coordinates of this point by a specified value', function () {\r | |
| 128 | var p = new Ext.draw.Point(2, 3),\r | |
| 129 | mp = p.mul(3);\r | |
| 130 | \r | |
| 131 | expect(mp.x).toEqual(6);\r | |
| 132 | expect(mp.y).toEqual(9);\r | |
| 133 | expect(mp).toNotBe(p);\r | |
| 134 | });\r | |
| 135 | });\r | |
| 136 | \r | |
| 137 | describe('div', function () {\r | |
| 138 | it('should return a new point which x/y values are the product of division of ' +\r | |
| 139 | 'coordinates of this point by a specified value', function () {\r | |
| 140 | var p = new Ext.draw.Point(2, 3),\r | |
| 141 | dp = p.div(2);\r | |
| 142 | \r | |
| 143 | expect(dp.x).toEqual(1);\r | |
| 144 | expect(dp.y).toEqual(1.5);\r | |
| 145 | expect(dp).toNotBe(p);\r | |
| 146 | });\r | |
| 147 | });\r | |
| 148 | \r | |
| 149 | describe('dot', function () {\r | |
| 150 | it('should return a dot product (scalar) of two vectors', function () {\r | |
| 151 | var p = new Ext.draw.Point(2, 0),\r | |
| 152 | op = new Ext.draw.Point(0, 3), // vector orthogonal to p\r | |
| 153 | p1 = new Ext.draw.Point(3, 4),\r | |
| 154 | dot_p_op = p.dot(op),\r | |
| 155 | dot_p_p1 = p.dot(p1);\r | |
| 156 | \r | |
| 157 | expect(dot_p_op).toEqual(0);\r | |
| 158 | expect(dot_p_p1).toEqual(6);\r | |
| 159 | expect(dot_p_p1).toNotBe(p);\r | |
| 160 | });\r | |
| 161 | });\r | |
| 162 | \r | |
| 163 | describe('equals', function () {\r | |
| 164 | it('should check if the respective coordinates of this point ' +\r | |
| 165 | 'and provided point are equal', function () {\r | |
| 166 | var p1 = new Ext.draw.Point(2, 0),\r | |
| 167 | p2 = new Ext.draw.Point({x: 2, y: 0}),\r | |
| 168 | isEqual = p1.equals(p2);\r | |
| 169 | \r | |
| 170 | expect(isEqual).toBe(true);\r | |
| 171 | })\r | |
| 172 | });\r | |
| 173 | \r | |
| 174 | describe('rotate', function () {\r | |
| 175 | it('should rotate the point (around origin and an arbitrary point) ' +\r | |
| 176 | 'by a specified angle', function () {\r | |
| 177 | var p = new Ext.draw.Point(1, 0),\r | |
| 178 | center = new Ext.draw.Point(0, 1),\r | |
| 179 | degrees = 45,\r | |
| 180 | rads = 45 / 180 * Math.PI,\r | |
| 181 | rp = p.rotate(degrees),\r | |
| 182 | rcp = p.rotate(degrees, center);\r | |
| 183 | \r | |
| 184 | expect(rp.x).toEqual(Math.cos(rads));\r | |
| 185 | expect(rp.y).toEqual(Math.sin(rads));\r | |
| 186 | expect(rcp.x).toBeCloseTo(Math.sqrt(2), precision);\r | |
| 187 | expect(rcp.y).toBeCloseTo(1, precision);\r | |
| 188 | });\r | |
| 189 | });\r | |
| 190 | \r | |
| 191 | describe('transform', function () {\r | |
| 192 | it('should transform a point from one coordinate system to another ' +\r | |
| 193 | 'given a transformation matrix or its elements', function () {\r | |
| 194 | var p = new Ext.draw.Point(2, 0),\r | |
| 195 | matrix = new Ext.draw.Matrix(),\r | |
| 196 | tp;\r | |
| 197 | \r | |
| 198 | matrix.translate(1, 1);\r | |
| 199 | matrix.rotate(Math.PI / 2);\r | |
| 200 | matrix.scale(2);\r | |
| 201 | \r | |
| 202 | tp = p.transform(matrix);\r | |
| 203 | \r | |
| 204 | expect(tp.x).toBeCloseTo(1, precision);\r | |
| 205 | expect(tp.y).toBeCloseTo(5, precision);\r | |
| 206 | \r | |
| 207 | tp = p.transform.apply(p, matrix.elements);\r | |
| 208 | \r | |
| 209 | expect(tp.x).toBeCloseTo(1, precision);\r | |
| 210 | expect(tp.y).toBeCloseTo(5, precision);\r | |
| 211 | });\r | |
| 212 | });\r | |
| 213 | \r | |
| 214 | describe('normalize', function () {\r | |
| 215 | it('should return a new vector with the length of 1 and the same angle', function () {\r | |
| 216 | var p = new Ext.draw.Point(5, 5),\r | |
| 217 | cos = Math.cos(Math.PI / 4),\r | |
| 218 | np = p.normalize(),\r | |
| 219 | np5 = p.normalize(5);\r | |
| 220 | \r | |
| 221 | expect(np.x).toBeCloseTo(cos, precision);\r | |
| 222 | expect(np.y).toBeCloseTo(cos, precision);\r | |
| 223 | expect(np.length).toBeCloseTo(1, precision);\r | |
| 224 | expect(np.angle).toBeCloseTo(45, precision);\r | |
| 225 | \r | |
| 226 | expect(np5.x).toBeCloseTo(5 * cos, precision);\r | |
| 227 | expect(np5.y).toBeCloseTo(5 * cos, precision);\r | |
| 228 | expect(np5.length).toBeCloseTo(5, precision);\r | |
| 229 | expect(np5.angle).toBeCloseTo(45, precision);\r | |
| 230 | });\r | |
| 231 | });\r | |
| 232 | \r | |
| 233 | describe('getDistanceToLine', function () {\r | |
| 234 | it('should return a distance from the point to the line (as a vector)', function () {\r | |
| 235 | var p = new Ext.draw.Point(1, 1),\r | |
| 236 | p1 = new Ext.draw.Point(1, 2),\r | |
| 237 | p2 = new Ext.draw.Point(2, 1),\r | |
| 238 | d1 = p.getDistanceToLine(p1, p2),\r | |
| 239 | d2 = p.getDistanceToLine(1, 2, 2, 1),\r | |
| 240 | d = Math.sqrt(2) / 2;\r | |
| 241 | \r | |
| 242 | expect(d1.length).toBeCloseTo(d, precision);\r | |
| 243 | expect(d2.length).toBeCloseTo(d, precision);\r | |
| 244 | \r | |
| 245 | });\r | |
| 246 | });\r | |
| 247 | }); |