| ... | ... | @@ -171,6 +171,59 @@ test "expectEqual.union(enum)" { |
| 171 | 171 | expectEqual(a10, a10); |
| 172 | 172 | } |
| 173 | 173 | |
| 174 | /// This function is intended to be used only in tests. When the actual value is not |
| 175 | /// within the margin of the expected value, |
| 176 | /// prints diagnostics to stderr to show exactly how they are not equal, then aborts. |
| 177 | /// The types must be floating point |
| 178 | pub fn expectWithinMargin(expected: var, actual: @TypeOf(expected), margin: @TypeOf(expected)) void { |
| 179 | std.debug.assert(margin >= 0.0); |
| 180 | |
| 181 | switch (@typeInfo(@TypeOf(actual))) { |
| 182 | .Float, |
| 183 | .ComptimeFloat, |
| 184 | => { |
| 185 | if (@fabs(expected - actual) > margin) { |
| 186 | std.debug.panic("actual {}, not within margin {} of expected {}", .{ actual, margin, expected }); |
| 187 | } |
| 188 | }, |
| 189 | else => @compileError("Unable to compare non floating point values"), |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | test "expectWithinMargin.f32" { |
| 194 | const x: f32 = 12.0; |
| 195 | const y: f32 = 12.06; |
| 196 | |
| 197 | expectWithinMargin(x, y, 0.1); |
| 198 | } |
| 199 | |
| 200 | /// This function is intended to be used only in tests. When the actual value is not |
| 201 | /// within the epsilon of the expected value, |
| 202 | /// prints diagnostics to stderr to show exactly how they are not equal, then aborts. |
| 203 | /// The types must be floating point |
| 204 | pub fn expectWithinEpsilon(expected: var, actual: @TypeOf(expected), epsilon: @TypeOf(expected)) void { |
| 205 | std.debug.assert(epsilon >= 0.0 and epsilon <= 1.0); |
| 206 | |
| 207 | const margin = epsilon * expected; |
| 208 | switch (@typeInfo(@TypeOf(actual))) { |
| 209 | .Float, |
| 210 | .ComptimeFloat, |
| 211 | => { |
| 212 | if (@fabs(expected - actual) > margin) { |
| 213 | std.debug.panic("actual {}, not within epsilon {}, of expected {}", .{ actual, epsilon, expected }); |
| 214 | } |
| 215 | }, |
| 216 | else => @compileError("Unable to compare non floating point values"), |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | test "expectWithinEpsilon.f32" { |
| 221 | const x: f32 = 12.0; |
| 222 | const y: f32 = 13.2; |
| 223 | |
| 224 | expectWithinEpsilon(x, y, 0.1); |
| 225 | } |
| 226 | |
| 174 | 227 | /// This function is intended to be used only in tests. When the two slices are not |
| 175 | 228 | /// equal, prints diagnostics to stderr to show exactly how they are not equal, |
| 176 | 229 | /// then aborts. |
Andrew Kelley <andrew@ziglang.org> 2020-07-26 05:54:30+00:00
GitHub <noreply@github.com> 2020-07-26 05:54:30+00:00