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// Copyright ©2014 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 testblas
import (
"testing"
"gonum.org/v1/gonum/blas"
"gonum.org/v1/gonum/floats"
)
type Dsymver interface {
Dsymv(ul blas.Uplo, n int, alpha float64, a []float64, lda int, x []float64, incX int, beta float64, y []float64, incY int)
}
func DsymvTest(t *testing.T, blasser Dsymver) {
for i, test := range []struct {
ul blas.Uplo
n int
a [][]float64
x []float64
y []float64
alpha float64
beta float64
ans []float64
}{
{
ul: blas.Upper,
n: 3,
a: [][]float64{
{5, 6, 7},
{0, 8, 10},
{0, 0, 13},
},
x: []float64{3, 4, 5},
y: []float64{6, 7, 8},
alpha: 2.1,
beta: -3,
ans: []float64{137.4, 189, 240.6},
},
{
ul: blas.Lower,
n: 3,
a: [][]float64{
{5, 0, 0},
{6, 8, 0},
{7, 10, 13},
},
x: []float64{3, 4, 5},
y: []float64{6, 7, 8},
alpha: 2.1,
beta: -3,
ans: []float64{137.4, 189, 240.6},
},
} {
incTest := func(incX, incY, extra int) {
x := makeIncremented(test.x, incX, extra)
y := makeIncremented(test.y, incY, extra)
aFlat := flatten(test.a)
ans := makeIncremented(test.ans, incY, extra)
blasser.Dsymv(test.ul, test.n, test.alpha, aFlat, test.n, x, incX, test.beta, y, incY)
if !floats.EqualApprox(ans, y, 1e-14) {
t.Errorf("Case %v, incX=%v, incY=%v: Want %v, got %v.", i, incX, incY, ans, y)
}
}
incTest(1, 1, 0)
incTest(2, 3, 0)
incTest(3, 2, 0)
incTest(-3, 2, 0)
incTest(-2, 4, 0)
incTest(2, -1, 0)
incTest(-3, -4, 3)
}
}
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