mirror of
https://github.com/gonum/gonum.git
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59 lines
1.3 KiB
Go
59 lines
1.3 KiB
Go
// Copyright ©2017 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 testblas
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import (
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"testing"
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"golang.org/x/exp/rand"
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"gonum.org/v1/gonum/floats/scalar"
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)
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type Dzasumer interface {
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Dzasum(n int, x []complex128, incX int) float64
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}
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func DzasumTest(t *testing.T, impl Dzasumer) {
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const tol = 1e-14
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rnd := rand.New(rand.NewSource(1))
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for _, n := range []int{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 50, 100} {
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for _, incX := range []int{-5, 1, 2, 10} {
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aincX := abs(incX)
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var x []complex128
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if n > 0 {
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x = make([]complex128, (n-1)*aincX+1)
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}
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for i := range x {
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x[i] = znan
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}
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for i := 0; i < n; i++ {
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re := float64(2*i + 1)
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if rnd.Intn(2) == 0 {
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re *= -1
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}
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im := float64(2 * (i + 1))
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if rnd.Intn(2) == 0 {
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im *= -1
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}
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x[i*aincX] = complex(re, im)
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}
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want := float64(n * (2*n + 1))
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got := impl.Dzasum(n, x, incX)
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if incX < 0 {
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if got != 0 {
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t.Errorf("Case n=%v,incX=%v: non-zero result when incX < 0. got %v", n, incX, got)
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}
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continue
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}
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if !scalar.EqualWithinAbsOrRel(got, want, tol, tol) {
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t.Errorf("Case n=%v,incX=%v: unexpected result. want %v, got %v", n, incX, want, got)
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}
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}
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}
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}
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