1 // Copyright ©2017 The Gonum Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
12 type Zdscaler interface {
13 Zdscal(n int, alpha float64, x []complex128, incX int)
16 func ZdscalTest(t *testing.T, impl Zdscaler) {
17 for tc, test := range []struct {
29 x: []complex128{1 + 2i},
30 want: []complex128{3 + 6i},
34 x: []complex128{1 + 2i, 3 + 4i},
35 want: []complex128{3 + 6i, 9 + 12i},
39 x: []complex128{1 + 2i, 3 + 4i, 5 + 6i},
40 want: []complex128{3 + 6i, 9 + 12i, 15 + 18i},
44 x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i},
45 want: []complex128{3 + 6i, 9 + 12i, 15 + 18i, 21 + 24i},
49 x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i},
50 want: []complex128{3 + 6i, 9 + 12i, 15 + 18i, 21 + 24i, 27 + 30i},
54 x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i, 11 + 12i},
55 want: []complex128{3 + 6i, 9 + 12i, 15 + 18i, 21 + 24i, 27 + 30i, 33 + 36i},
59 x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i, 11 + 12i, 13 + 14i},
60 want: []complex128{3 + 6i, 9 + 12i, 15 + 18i, 21 + 24i, 27 + 30i, 33 + 36i, 39 + 42i},
64 x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i, 11 + 12i, 13 + 14i, 15 + 16i},
65 want: []complex128{3 + 6i, 9 + 12i, 15 + 18i, 21 + 24i, 27 + 30i, 33 + 36i, 39 + 42i, 45 + 48i},
69 x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i, 11 + 12i, 13 + 14i, 15 + 16i, 17 + 18i},
70 want: []complex128{3 + 6i, 9 + 12i, 15 + 18i, 21 + 24i, 27 + 30i, 33 + 36i, 39 + 42i, 45 + 48i, 51 + 54i},
74 x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i, 11 + 12i, 13 + 14i, 15 + 16i, 17 + 18i, 19 + 20i},
75 want: []complex128{3 + 6i, 9 + 12i, 15 + 18i, 21 + 24i, 27 + 30i, 33 + 36i, 39 + 42i, 45 + 48i, 51 + 54i, 57 + 60i},
79 x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i, 11 + 12i, 13 + 14i, 15 + 16i, 17 + 18i, 19 + 20i, 21 + 22i},
80 want: []complex128{3 + 6i, 9 + 12i, 15 + 18i, 21 + 24i, 27 + 30i, 33 + 36i, 39 + 42i, 45 + 48i, 51 + 54i, 57 + 60i, 63 + 66i},
84 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},
85 want: []complex128{3 + 6i, 9 + 12i, 15 + 18i, 21 + 24i, 27 + 30i, 33 + 36i, 39 + 42i, 45 + 48i, 51 + 54i, 57 + 60i, 63 + 66i, 69 + 72i},
89 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},
90 want: []complex128{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
94 if len(test.want) != n {
97 for _, incX := range []int{-3, -1, 1, 2, 4, 7, 10} {
98 x := makeZVector(test.x, incX)
99 xCopy := make([]complex128, len(x))
102 want := makeZVector(test.want, incX)
104 impl.Zdscal(n, test.alpha, x, incX)
106 prefix := fmt.Sprintf("Case %v (n=%v,incX=%v):", tc, n, incX)
109 if !zsame(x, xCopy) {
110 t.Errorf("%v: unexpected modification of x\nwant %v\ngot %v", prefix, want, x)
115 t.Errorf("%v: unexpected result:\nwant: %v\ngot: %v", prefix, want, x)