fix commands

[bytom/shuttle.git] / vendor / github.com / bytom / vendor / gonum.org / v1 / gonum / lapack / testlapack / dlapy2.go

diff --git a/vendor/github.com/bytom/vendor/gonum.org/v1/gonum/lapack/testlapack/dlapy2.go b/vendor/github.com/bytom/vendor/gonum.org/v1/gonum/lapack/testlapack/dlapy2.go
new file mode 100644 (file)
index 0000000..04e6793
--- /dev/null
+++ b/vendor/github.com/bytom/vendor/gonum.org/v1/gonum/lapack/testlapack/dlapy2.go
@@ -0,0 +1,31 @@
+// 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"
+       "testing"
+
+       "golang.org/x/exp/rand"
+
+       "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)
+               }
+       }
+}