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