1// Copyright 2018 The Go 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 5package alias 6 7import "testing" 8 9var a, b [100]byte 10 11var aliasingTests = []struct { 12 x, y []byte 13 anyOverlap, inexactOverlap bool 14}{ 15 {a[:], b[:], false, false}, 16 {a[:], b[:0], false, false}, 17 {a[:], b[:50], false, false}, 18 {a[40:50], a[50:60], false, false}, 19 {a[40:50], a[60:70], false, false}, 20 {a[:51], a[50:], true, true}, 21 {a[:], a[:], true, false}, 22 {a[:50], a[:60], true, false}, 23 {a[:], nil, false, false}, 24 {nil, nil, false, false}, 25 {a[:], a[:0], false, false}, 26 {a[:10], a[:10:20], true, false}, 27 {a[:10], a[5:10:20], true, true}, 28} 29 30func testAliasing(t *testing.T, i int, x, y []byte, anyOverlap, inexactOverlap bool) { 31 any := AnyOverlap(x, y) 32 if any != anyOverlap { 33 t.Errorf("%d: wrong AnyOverlap result, expected %v, got %v", i, anyOverlap, any) 34 } 35 inexact := InexactOverlap(x, y) 36 if inexact != inexactOverlap { 37 t.Errorf("%d: wrong InexactOverlap result, expected %v, got %v", i, inexactOverlap, any) 38 } 39} 40 41func TestAliasing(t *testing.T) { 42 for i, tt := range aliasingTests { 43 testAliasing(t, i, tt.x, tt.y, tt.anyOverlap, tt.inexactOverlap) 44 testAliasing(t, i, tt.y, tt.x, tt.anyOverlap, tt.inexactOverlap) 45 } 46} 47