| ... | ... | @@ -168,6 +168,32 @@ test "expectEqual.union(enum)" { |
| 168 | 168 | expectEqual(a10, a10); |
| 169 | 169 | } |
| 170 | 170 | |
| 171 | /// This function is intended to be used only in tests. When the actual value is not |
| 172 | /// within the margin of the expected value, |
| 173 | /// prints diagnostics to stderr to show exactly how they are not equal, then aborts. |
| 174 | /// The types must be floating point |
| 175 | pub fn expectWithinMargin(expected: var, actual: @TypeOf(expected), margin: @TypeOf(expected)) void { |
| 176 | std.debug.assert(margin >= 0.0); |
| 177 | |
| 178 | switch (@typeInfo(@TypeOf(actual))) { |
| 179 | .Float, |
| 180 | .ComptimeFloat, |
| 181 | => { |
| 182 | if (@fabs(expected - actual) > margin) { |
| 183 | std.debug.panic("actual {}, not within margin {} of expected {}", .{ actual, margin, expected }); |
| 184 | } |
| 185 | }, |
| 186 | else => @compileError("Unable to compare non floating point values"), |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | test "expectWithinMargin.f32" { |
| 191 | const x: f32 = 12.0; |
| 192 | const y: f32 = 12.06; |
| 193 | |
| 194 | expectWithinMargin(x, y, 0.1); |
| 195 | } |
| 196 | |
| 171 | 197 | /// This function is intended to be used only in tests. When the two slices are not |
| 172 | 198 | /// equal, prints diagnostics to stderr to show exactly how they are not equal, |
| 173 | 199 | /// then aborts. |
antlilja <liljaanton2001@gmail.com> 2020-06-23 18:05:32+02:00