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 Zscaler interface {
13 Zscal(n int, alpha complex128, x []complex128, incX int)
16 func ZscalTest(t *testing.T, impl Zscaler) {
17 for tc, test := range []struct {
29 x: []complex128{1 + 2i},
30 want: []complex128{-8 + 9i},
34 x: []complex128{1 + 2i, 3 + 4i},
35 want: []complex128{-8 + 9i, -14 + 23i},
39 x: []complex128{1 + 2i, 3 + 4i, 5 + 6i},
40 want: []complex128{-8 + 9i, -14 + 23i, -20 + 37i},
44 x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i},
45 want: []complex128{-8 + 9i, -14 + 23i, -20 + 37i, -26 + 51i},
49 x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i},
50 want: []complex128{-8 + 9i, -14 + 23i, -20 + 37i, -26 + 51i, -32 + 65i},
54 x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i, 11 + 12i},
55 want: []complex128{-8 + 9i, -14 + 23i, -20 + 37i, -26 + 51i, -32 + 65i, -38 + 79i},
59 x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i, 11 + 12i, 13 + 14i},
60 want: []complex128{-8 + 9i, -14 + 23i, -20 + 37i, -26 + 51i, -32 + 65i, -38 + 79i, -44 + 93i},
64 x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i, 11 + 12i, 13 + 14i, 15 + 16i},
65 want: []complex128{-8 + 9i, -14 + 23i, -20 + 37i, -26 + 51i, -32 + 65i, -38 + 79i, -44 + 93i, -50 + 107i},
69 x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i, 9 + 10i, 11 + 12i, 13 + 14i, 15 + 16i, 17 + 18i},
70 want: []complex128{-8 + 9i, -14 + 23i, -20 + 37i, -26 + 51i, -32 + 65i, -38 + 79i, -44 + 93i, -50 + 107i, -56 + 121i},
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{-8 + 9i, -14 + 23i, -20 + 37i, -26 + 51i, -32 + 65i, -38 + 79i, -44 + 93i, -50 + 107i, -56 + 121i, -62 + 135i},
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{-8 + 9i, -14 + 23i, -20 + 37i, -26 + 51i, -32 + 65i, -38 + 79i, -44 + 93i, -50 + 107i, -56 + 121i, -62 + 135i, -68 + 149i},
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{-8 + 9i, -14 + 23i, -20 + 37i, -26 + 51i, -32 + 65i, -38 + 79i, -44 + 93i, -50 + 107i, -56 + 121i, -62 + 135i, -68 + 149i, -74 + 163i},
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.Zscal(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)