--- /dev/null
+// 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 Zdotuer interface {
+ Zdotu(n int, x []complex128, incX int, y []complex128, incY int) complex128
+}
+
+func ZdotuTest(t *testing.T, impl Zdotuer) {
+ 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: -32 + 91i,
+ wantRev: -32 + 91i,
+ },
+ {
+ x: []complex128{1 + 2i, 3 + 4i},
+ y: []complex128{30 + 31i, 33 + 34i},
+ want: -69 + 325i,
+ wantRev: -69 + 313i,
+ },
+ {
+ x: []complex128{1 + 2i, 3 + 4i, 5 + 6i},
+ y: []complex128{30 + 31i, 33 + 34i, 36 + 37i},
+ want: -111 + 726i,
+ wantRev: -111 + 678i,
+ },
+ {
+ x: []complex128{1 + 2i, 3 + 4i, 5 + 6i, 7 + 8i},
+ y: []complex128{30 + 31i, 33 + 34i, 36 + 37i, 39 + 40i},
+ want: -158 + 1318i,
+ wantRev: -158 + 1198i,
+ },
+ {
+ 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: -210 + 2125i,
+ wantRev: -210 + 1885i,
+ },
+ {
+ 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: -267 + 3171i,
+ wantRev: -267 + 2751i,
+ },
+ {
+ 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: -329 + 4480i,
+ wantRev: -329 + 3808i,
+ },
+ {
+ 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: -396 + 6076i,
+ wantRev: -396 + 5068i,
+ },
+ {
+ 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: -468 + 7983i,
+ wantRev: -468 + 6543i,
+ },
+ {
+ 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: -545 + 10225i,
+ wantRev: -545 + 8245i,
+ },
+ {
+ 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: -627 + 12826i,
+ wantRev: -627 + 10186i,
+ },
+ {
+ 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: -714 + 15810i,
+ wantRev: -714 + 12378i,
+ },
+ } {
+ 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.Zdotu(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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