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| 1 | +#!/usr/bin/env python |
| 2 | + |
| 3 | +from circle import Circle, Sphere |
| 4 | + |
| 5 | +import pytest |
| 6 | + |
| 7 | +from math import pi |
| 8 | +import random |
| 9 | + |
| 10 | + |
| 11 | +def test_init(): |
| 12 | + """ |
| 13 | + tests that you can initilize a Circle |
| 14 | + """ |
| 15 | + Circle(3) |
| 16 | + |
| 17 | + |
| 18 | +def test_radius(): |
| 19 | + """ |
| 20 | + test that the radius is properly set and can be retrieved |
| 21 | + """ |
| 22 | + c = Circle(3) |
| 23 | + |
| 24 | + assert c.radius == 3 |
| 25 | + |
| 26 | + |
| 27 | +def test_no_radius(): |
| 28 | + """ |
| 29 | + test that you get an Exception if you don't provide a radius |
| 30 | + """ |
| 31 | + with pytest.raises(TypeError): |
| 32 | + c = Circle() |
| 33 | + |
| 34 | + |
| 35 | +def test_set_radius(): |
| 36 | + """ |
| 37 | + test that changing the radius "stays" |
| 38 | + """ |
| 39 | + c = Circle(3) |
| 40 | + c.radius = 5 |
| 41 | + assert c.radius == 5 |
| 42 | + |
| 43 | + |
| 44 | +def test_diam(): |
| 45 | + """ |
| 46 | + can you retrieve the diameter? |
| 47 | + """ |
| 48 | + c = Circle(3) |
| 49 | + |
| 50 | + assert c.diameter == 6 |
| 51 | + |
| 52 | + |
| 53 | +def test_radius_change(): |
| 54 | + """ |
| 55 | + does the diameter change after changing the radius? |
| 56 | + """ |
| 57 | + c = Circle(3) |
| 58 | + c.radius = 4 |
| 59 | + assert c.diameter == 8 |
| 60 | + |
| 61 | + |
| 62 | +def test_set_diameter(): |
| 63 | + """ |
| 64 | + can you set the diameter? |
| 65 | + """ |
| 66 | + c = Circle(4) |
| 67 | + c.diameter = 10 |
| 68 | + |
| 69 | + assert c.radius == 5 |
| 70 | + assert c.diameter == 10 |
| 71 | + |
| 72 | + |
| 73 | +def test_set_diameter_float(): |
| 74 | + """ |
| 75 | + is floating point computation used for computing the diameter? |
| 76 | + """ |
| 77 | + c = Circle(4) |
| 78 | + c.diameter = 11 |
| 79 | + |
| 80 | + assert c.radius == 5.5 |
| 81 | + assert c.diameter == 11 |
| 82 | + |
| 83 | + |
| 84 | +def test_area(): |
| 85 | + """ |
| 86 | + is the area computed correctly? |
| 87 | + """ |
| 88 | + c = Circle(2) |
| 89 | + |
| 90 | + assert c.area == pi*4 |
| 91 | + |
| 92 | + |
| 93 | +def test_set_area(): |
| 94 | + """ |
| 95 | + you should not be able to set the area |
| 96 | + """ |
| 97 | + c = Circle(2) |
| 98 | + with pytest.raises(AttributeError): |
| 99 | + c.area = 30 |
| 100 | + |
| 101 | + |
| 102 | +def test_from_diameter(): |
| 103 | + """ |
| 104 | + can we create a Circle from the diameter? |
| 105 | + """ |
| 106 | + c = Circle.from_diameter(4) |
| 107 | + |
| 108 | + assert isinstance(c, Circle) |
| 109 | + assert c.radius == 2 |
| 110 | + assert c.diameter == 4 |
| 111 | + |
| 112 | + |
| 113 | +def test_repr(): |
| 114 | + """ |
| 115 | + does it have a correct repr()? |
| 116 | + """ |
| 117 | + c = Circle(6.0) |
| 118 | + |
| 119 | + assert repr(c) == 'Circle(6.0)' |
| 120 | + |
| 121 | + |
| 122 | +def test_str(): |
| 123 | + """ |
| 124 | + does it have a correct str()? |
| 125 | + """ |
| 126 | + c = Circle(3.0) |
| 127 | + |
| 128 | + assert str(c) == 'Circle with radius: 3' |
| 129 | + |
| 130 | + |
| 131 | +def test_addition(): |
| 132 | + """ |
| 133 | + do two circles add up correctly |
| 134 | + """ |
| 135 | + c1 = Circle(2) |
| 136 | + c2 = Circle(3) |
| 137 | + c3 = c1 + c2 |
| 138 | + |
| 139 | + assert c3.radius == 5 |
| 140 | + |
| 141 | + |
| 142 | +def test_multiplication(): |
| 143 | + """ |
| 144 | + Can you scale a circle my multiplying it? |
| 145 | + """ |
| 146 | + c1 = Circle(2) |
| 147 | + c3 = c1 * 4 |
| 148 | + |
| 149 | + assert c3.radius == 8 |
| 150 | + |
| 151 | + |
| 152 | +def test_equal(): |
| 153 | + """ |
| 154 | + Does equality work? |
| 155 | + """ |
| 156 | + c1 = Circle(3) |
| 157 | + c2 = Circle(3.0) |
| 158 | + |
| 159 | + assert c1 == c2 |
| 160 | + assert c1 <= c2 |
| 161 | + assert c1 >= c2 |
| 162 | + |
| 163 | + |
| 164 | +def test_not_equal(): |
| 165 | + """ |
| 166 | + does not equal work? |
| 167 | + """ |
| 168 | + c1 = Circle(2.9) |
| 169 | + c2 = Circle(3.0) |
| 170 | + |
| 171 | + assert c1 != c2 |
| 172 | + |
| 173 | + |
| 174 | +def test_greater(): |
| 175 | + """ |
| 176 | + comparison: greater than |
| 177 | + """ |
| 178 | + c1 = Circle(2) |
| 179 | + c2 = Circle(3) |
| 180 | + |
| 181 | + assert c2 > c1 |
| 182 | + assert c2 >= c1 |
| 183 | + |
| 184 | + |
| 185 | +def test_less(): |
| 186 | + """ |
| 187 | + comparison: less than |
| 188 | + """ |
| 189 | + c1 = Circle(2) |
| 190 | + c2 = Circle(3) |
| 191 | + |
| 192 | + assert c1 < c2 |
| 193 | + assert c1 <= c2 |
| 194 | + |
| 195 | + |
| 196 | +def test_reverse_multiply(): |
| 197 | + """ |
| 198 | + multiplication in the other order |
| 199 | + """ |
| 200 | + c = Circle(3) |
| 201 | + |
| 202 | + c2 = 3 * c |
| 203 | + |
| 204 | + assert c2.radius == 9.0 |
| 205 | + |
| 206 | + |
| 207 | +def test_plus_equal(): |
| 208 | + """ |
| 209 | + in-place addition |
| 210 | + """ |
| 211 | + c = Circle(3) |
| 212 | + c2 = c |
| 213 | + |
| 214 | + c += Circle(2) |
| 215 | + |
| 216 | + assert c.radius == 5 |
| 217 | + assert c is c2 |
| 218 | + assert c2.radius == 5 |
| 219 | + |
| 220 | + |
| 221 | +def test_times_equal(): |
| 222 | + """ |
| 223 | + in-place multiplication |
| 224 | + """ |
| 225 | + c = Circle(3) |
| 226 | + c2 = c |
| 227 | + |
| 228 | + c *= 2 |
| 229 | + |
| 230 | + assert c.radius == 6 |
| 231 | + assert c is c2 |
| 232 | + assert c2.radius == 6 |
| 233 | + |
| 234 | + |
| 235 | +def test_sort(): |
| 236 | + """ |
| 237 | + can circles be sorted? |
| 238 | + """ |
| 239 | + a_list = [Circle(20), Circle(10), Circle(15), Circle(5)] |
| 240 | + |
| 241 | + a_list.sort() |
| 242 | + |
| 243 | + assert a_list[0] == Circle(5) |
| 244 | + assert a_list[3] == Circle(20) |
| 245 | + assert a_list[0] < a_list[1] < a_list[2] < a_list[3] |
| 246 | + |
| 247 | + |
| 248 | +############################# |
| 249 | +# Tests for the Sphere Object |
| 250 | +############################# |
| 251 | +def test_sphere_vol(): |
| 252 | + """ |
| 253 | + Is the volume correct? |
| 254 | + """ |
| 255 | + s = Sphere(4) |
| 256 | + |
| 257 | + print(s.volume()) |
| 258 | + assert s.volume() == 268.082573106329 |
| 259 | + |
| 260 | + |
| 261 | +def test_sphere_change_radius(): |
| 262 | + """ |
| 263 | + create from diameter, change the radius |
| 264 | +
|
| 265 | + NOTE: if you subclassed Circlel then this all should "just work"! |
| 266 | + """ |
| 267 | + s = Sphere.from_diameter(8) |
| 268 | + |
| 269 | + assert s.radius == 4 |
| 270 | + |
| 271 | + s.radius = 3 |
| 272 | + assert s.diameter == 6 |
| 273 | + |
| 274 | + |
| 275 | +def test_sphere_diameter(): |
| 276 | + s = Sphere.from_diameter(8) |
| 277 | + |
| 278 | + # check that the classmethod got properly inherited |
| 279 | + assert type(s) == Sphere |
| 280 | + print(s.volume()) |
| 281 | + assert s.volume() == 268.082573106329 |
| 282 | + |
| 283 | + |
| 284 | +def test_sphere_area(): |
| 285 | + """ |
| 286 | + sphere's don't really have an area in the same way |
| 287 | + """ |
| 288 | + s = Sphere(4) |
| 289 | + |
| 290 | + with pytest.raises(NotImplementedError): |
| 291 | + s.area() |
| 292 | + |
| 293 | + |
| 294 | +def test_sphere_repr(): |
| 295 | + s = Sphere(12) |
| 296 | + |
| 297 | + assert repr(s) == "Sphere(12)" |
| 298 | + assert eval(repr(s)) == s |
| 299 | + |
| 300 | + |
| 301 | +def test_sphere_str(): |
| 302 | + s = Sphere(12) |
| 303 | + |
| 304 | + assert str(s) == "Sphere with radius: 12" |
| 305 | + assert eval(repr(s)) == s |
| 306 | + |
| 307 | + |
| 308 | +def test_sphere_sort(): |
| 309 | + list_o_spheres = [Sphere(random.randint(1, 20)) for i in range(10)] |
| 310 | + |
| 311 | + print(list_o_spheres) |
| 312 | + |
| 313 | + list_o_spheres.sort() |
| 314 | + |
| 315 | + print(list_o_spheres) |
| 316 | + |
| 317 | + for s1, s2 in zip(list_o_spheres, list_o_spheres[1:]): |
| 318 | + assert s1 <= s2 |
| 319 | + |
| 320 | + |
| 321 | + |
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