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// Copyright ©2017 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 (
"fmt"
"testing"
)
type Zdotcer interface {
Zdotc(n int, x []complex128, incX int, y []complex128, incY int) complex128
}
func ZdotcTest(t *testing.T, impl Zdotcer) {
for tc, test := range []struct {
x, y []complex128
want complex128 // Result when both increments have the same sign.
wantRev complex128 // Result when the increments have opposite sign.
}{
{
x: nil,
y: nil,
want: 0,
wantRev: 0,
},
{
x: []complex128{1 + 2i},
y: []complex128{30 + 31i},
want: 92 - 29i,
wantRev: 92 - 29i,
},
{
x: []complex128{1 + 2i, 3 + 4i},
y: []complex128{30 + 31i, 33 + 34i},
want: 327 - 59i,
wantRev: 315 - 59i,
},
{
x: []complex128{1 + 2i, 3 + 4i, 5 + 6i},
y: []complex128{30 + 31i, 33 + 34i, 36 + 37i},
want: 729 - 90i,
wantRev: 681 - 90i,
},
{
x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i},
y: []complex128{30 + 31i, 33 + 34i, 36 + 37i, 39 + 40i},
want: 1322 - 122i,
wantRev: 1202 - 122i,
},
{
x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i},
y: []complex128{30 + 31i, 33 + 34i, 36 + 37i, 39 + 40i, 42 + 43i},
want: 2130 - 155i,
wantRev: 1890 - 155i,
},
{
x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i, 11 + 12i},
y: []complex128{30 + 31i, 33 + 34i, 36 + 37i, 39 + 40i, 42 + 43i, 45 + 46i},
want: 3177 - 189i,
wantRev: 2757 - 189i,
},
{
x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i, 11 + 12i, 13 + 14i},
y: []complex128{30 + 31i, 33 + 34i, 36 + 37i, 39 + 40i, 42 + 43i, 45 + 46i, 48 + 49i},
want: 4487 - 224i,
wantRev: 3815 - 224i,
},
{
x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i, 11 + 12i, 13 + 14i, 15 + 16i},
y: []complex128{30 + 31i, 33 + 34i, 36 + 37i, 39 + 40i, 42 + 43i, 45 + 46i, 48 + 49i, 51 + 52i},
want: 6084 - 260i,
wantRev: 5076 - 260i,
},
{
x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i, 11 + 12i, 13 + 14i, 15 + 16i, 17 + 18i},
y: []complex128{30 + 31i, 33 + 34i, 36 + 37i, 39 + 40i, 42 + 43i, 45 + 46i, 48 + 49i, 51 + 52i, 54 + 55i},
want: 7992 - 297i,
wantRev: 6552 - 297i,
},
{
x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i, 11 + 12i, 13 + 14i, 15 + 16i, 17 + 18i, 19 + 20i},
y: []complex128{30 + 31i, 33 + 34i, 36 + 37i, 39 + 40i, 42 + 43i, 45 + 46i, 48 + 49i, 51 + 52i, 54 + 55i, 57 + 58i},
want: 10235 - 335i,
wantRev: 8255 - 335i,
},
{
x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i, 11 + 12i, 13 + 14i, 15 + 16i, 17 + 18i, 19 + 20i, 21 + 22i},
y: []complex128{30 + 31i, 33 + 34i, 36 + 37i, 39 + 40i, 42 + 43i, 45 + 46i, 48 + 49i, 51 + 52i, 54 + 55i, 57 + 58i, 60 + 61i},
want: 12837 - 374i,
wantRev: 10197 - 374i,
},
{
x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i, 11 + 12i, 13 + 14i, 15 + 16i, 17 + 18i, 19 + 20i, 21 + 22i, 23 + 24i},
y: []complex128{30 + 31i, 33 + 34i, 36 + 37i, 39 + 40i, 42 + 43i, 45 + 46i, 48 + 49i, 51 + 52i, 54 + 55i, 57 + 58i, 60 + 61i, 63 + 64i},
want: 15822 - 414i,
wantRev: 12390 - 414i,
},
} {
n := len(test.x)
if len(test.y) != n {
panic("bad test")
}
for _, inc := range allPairs([]int{-7, -3, 1, 13}, []int{-11, -5, 1, 17}) {
incX := inc[0]
incY := inc[1]
x := makeZVector(test.x, incX)
xCopy := make([]complex128, len(x))
copy(xCopy, x)
y := makeZVector(test.y, incY)
yCopy := make([]complex128, len(y))
copy(yCopy, y)
want := test.want
if incX*incY < 0 {
want = test.wantRev
}
got := impl.Zdotc(n, x, incX, y, incY)
prefix := fmt.Sprintf("Case %v (incX=%v,incY=%v):", tc, incX, incY)
if !zsame(x, xCopy) {
t.Errorf("%v: unexpected modification of x", prefix)
}
if !zsame(y, yCopy) {
t.Errorf("%v: unexpected modification of y", prefix)
}
if got != want {
t.Errorf("%v: unexpected result. want %v, got %v", prefix, want, got)
}
}
}
}
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