| ... | ... | @@ -194,6 +194,33 @@ test "expectWithinMargin.f32" { |
| 194 | 194 | expectWithinMargin(x, y, 0.1); |
| 195 | 195 | } |
| 196 | 196 | |
| 197 | /// This function is intended to be used only in tests. When the actual value is not |
| 198 | /// within the epsilon of the expected value, |
| 199 | /// prints diagnostics to stderr to show exactly how they are not equal, then aborts. |
| 200 | /// The types must be floating point |
| 201 | pub fn expectWithinEpsilon(expected: var, actual: @TypeOf(expected), epsilon: @TypeOf(expected)) void { |
| 202 | std.debug.assert(epsilon >= 0.0 and epsilon <= 1.0); |
| 203 | |
| 204 | const margin = epsilon * expected; |
| 205 | switch (@typeInfo(@TypeOf(actual))) { |
| 206 | .Float, |
| 207 | .ComptimeFloat, |
| 208 | => { |
| 209 | if (@fabs(expected - actual) > margin) { |
| 210 | std.debug.panic("actual {}, not within epsilon {}, of expected {}", .{ actual, epsilon, expected }); |
| 211 | } |
| 212 | }, |
| 213 | else => @compileError("Unable to compare non floating point values"), |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | test "expectWithinEpsilon.f32" { |
| 218 | const x: f32 = 12.0; |
| 219 | const y: f32 = 13.2; |
| 220 | |
| 221 | expectWithinEpsilon(x, y, 0.1); |
| 222 | } |
| 223 | |
| 197 | 224 | /// This function is intended to be used only in tests. When the two slices are not |
| 198 | 225 | /// equal, prints diagnostics to stderr to show exactly how they are not equal, |
| 199 | 226 | /// then aborts. |
antlilja <liljaanton2001@gmail.com> 2020-06-23 18:08:15+02:00