| // Copyright ©2016 The gonum Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package testlapack |
| |
| import ( |
| "math" |
| "math/rand" |
| "testing" |
| |
| "gonum.org/v1/gonum/floats" |
| ) |
| |
| type Dlapy2er interface { |
| Dlapy2(float64, float64) float64 |
| } |
| |
| func Dlapy2Test(t *testing.T, impl Dlapy2er) { |
| rnd := rand.New(rand.NewSource(1)) |
| for i := 0; i < 10; i++ { |
| x := math.Abs(1e200 * rnd.NormFloat64()) |
| y := math.Abs(1e200 * rnd.NormFloat64()) |
| got := impl.Dlapy2(x, y) |
| want := math.Hypot(x, y) |
| if !floats.EqualWithinRel(got, want, 1e-16) { |
| t.Errorf("Dlapy2(%g, %g) = %g, want %g", x, y, got, want) |
| } |
| } |
| } |