github.com/gopherd/gonum@v0.0.4/blas/testblas/zscal.go (about)

     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.
     4  
     5  package testblas
     6  
     7  import (
     8  	"fmt"
     9  	"testing"
    10  )
    11  
    12  type Zscaler interface {
    13  	Zscal(n int, alpha complex128, x []complex128, incX int)
    14  }
    15  
    16  func ZscalTest(t *testing.T, impl Zscaler) {
    17  	for tc, test := range []struct {
    18  		alpha complex128
    19  		x     []complex128
    20  		want  []complex128
    21  	}{
    22  		{
    23  			alpha: 2 + 5i,
    24  			x:     nil,
    25  			want:  nil,
    26  		},
    27  		{
    28  			alpha: 2 + 5i,
    29  			x:     []complex128{1 + 2i},
    30  			want:  []complex128{-8 + 9i},
    31  		},
    32  		{
    33  			alpha: 2 + 5i,
    34  			x:     []complex128{1 + 2i, 3 + 4i},
    35  			want:  []complex128{-8 + 9i, -14 + 23i},
    36  		},
    37  		{
    38  			alpha: 2 + 5i,
    39  			x:     []complex128{1 + 2i, 3 + 4i, 5 + 6i},
    40  			want:  []complex128{-8 + 9i, -14 + 23i, -20 + 37i},
    41  		},
    42  		{
    43  			alpha: 2 + 5i,
    44  			x:     []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i},
    45  			want:  []complex128{-8 + 9i, -14 + 23i, -20 + 37i, -26 + 51i},
    46  		},
    47  		{
    48  			alpha: 2 + 5i,
    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},
    51  		},
    52  		{
    53  			alpha: 2 + 5i,
    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},
    56  		},
    57  		{
    58  			alpha: 2 + 5i,
    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},
    61  		},
    62  		{
    63  			alpha: 2 + 5i,
    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},
    66  		},
    67  		{
    68  			alpha: 2 + 5i,
    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},
    71  		},
    72  		{
    73  			alpha: 2 + 5i,
    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},
    76  		},
    77  		{
    78  			alpha: 2 + 5i,
    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},
    81  		},
    82  		{
    83  			alpha: 2 + 5i,
    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},
    86  		},
    87  		{
    88  			alpha: 0,
    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},
    91  		},
    92  	} {
    93  		n := len(test.x)
    94  		if len(test.want) != n {
    95  			panic("bad test")
    96  		}
    97  		for _, incX := range []int{-3, -1, 1, 2, 4, 7, 10} {
    98  			x := makeZVector(test.x, incX)
    99  			xCopy := make([]complex128, len(x))
   100  			copy(xCopy, x)
   101  
   102  			want := makeZVector(test.want, incX)
   103  
   104  			impl.Zscal(n, test.alpha, x, incX)
   105  
   106  			prefix := fmt.Sprintf("Case %v (n=%v,incX=%v):", tc, n, incX)
   107  
   108  			if incX < 0 {
   109  				if !zsame(x, xCopy) {
   110  					t.Errorf("%v: unexpected modification of x\nwant %v\ngot %v", prefix, want, x)
   111  				}
   112  				continue
   113  			}
   114  			if !zsame(x, want) {
   115  				t.Errorf("%v: unexpected result:\nwant: %v\ngot: %v", prefix, want, x)
   116  			}
   117  		}
   118  	}
   119  }