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e36aeda | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 | // Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// string_ssa.go tests string operations.
package main
import "testing"
//go:noinline
func testStringSlice1_ssa(a string, i, j int) string {
return a[i:]
}
//go:noinline
func testStringSlice2_ssa(a string, i, j int) string {
return a[:j]
}
//go:noinline
func testStringSlice12_ssa(a string, i, j int) string {
return a[i:j]
}
func testStringSlice(t *testing.T) {
tests := [...]struct {
fn func(string, int, int) string
s string
low, high int
want string
}{
// -1 means the value is not used.
{testStringSlice1_ssa, "foobar", 0, -1, "foobar"},
{testStringSlice1_ssa, "foobar", 3, -1, "bar"},
{testStringSlice1_ssa, "foobar", 6, -1, ""},
{testStringSlice2_ssa, "foobar", -1, 0, ""},
{testStringSlice2_ssa, "foobar", -1, 3, "foo"},
{testStringSlice2_ssa, "foobar", -1, 6, "foobar"},
{testStringSlice12_ssa, "foobar", 0, 6, "foobar"},
{testStringSlice12_ssa, "foobar", 0, 0, ""},
{testStringSlice12_ssa, "foobar", 6, 6, ""},
{testStringSlice12_ssa, "foobar", 1, 5, "ooba"},
{testStringSlice12_ssa, "foobar", 3, 3, ""},
{testStringSlice12_ssa, "", 0, 0, ""},
}
for i, test := range tests {
if got := test.fn(test.s, test.low, test.high); test.want != got {
t.Errorf("#%d %s[%d,%d] = %s, want %s", i, test.s, test.low, test.high, got, test.want)
}
}
}
type prefix struct {
prefix string
}
func (p *prefix) slice_ssa() {
p.prefix = p.prefix[:3]
}
//go:noinline
func testStructSlice(t *testing.T) {
p := &prefix{"prefix"}
p.slice_ssa()
if "pre" != p.prefix {
t.Errorf("wrong field slice: wanted %s got %s", "pre", p.prefix)
}
}
func testStringSlicePanic(t *testing.T) {
defer func() {
if r := recover(); r != nil {
//println("panicked as expected")
}
}()
str := "foobar"
t.Errorf("got %s and expected to panic, but didn't", testStringSlice12_ssa(str, 3, 9))
}
const _Accuracy_name = "BelowExactAbove"
var _Accuracy_index = [...]uint8{0, 5, 10, 15}
//go:noinline
func testSmallIndexType_ssa(i int) string {
return _Accuracy_name[_Accuracy_index[i]:_Accuracy_index[i+1]]
}
func testSmallIndexType(t *testing.T) {
tests := []struct {
i int
want string
}{
{0, "Below"},
{1, "Exact"},
{2, "Above"},
}
for i, test := range tests {
if got := testSmallIndexType_ssa(test.i); got != test.want {
t.Errorf("#%d got %s wanted %s", i, got, test.want)
}
}
}
//go:noinline
func testInt64Index_ssa(s string, i int64) byte {
return s[i]
}
//go:noinline
func testInt64Slice_ssa(s string, i, j int64) string {
return s[i:j]
}
func testInt64Index(t *testing.T) {
tests := []struct {
i int64
j int64
b byte
s string
}{
{0, 5, 'B', "Below"},
{5, 10, 'E', "Exact"},
{10, 15, 'A', "Above"},
}
str := "BelowExactAbove"
for i, test := range tests {
if got := testInt64Index_ssa(str, test.i); got != test.b {
t.Errorf("#%d got %d wanted %d", i, got, test.b)
}
if got := testInt64Slice_ssa(str, test.i, test.j); got != test.s {
t.Errorf("#%d got %s wanted %s", i, got, test.s)
}
}
}
func testInt64IndexPanic(t *testing.T) {
defer func() {
if r := recover(); r != nil {
//println("panicked as expected")
}
}()
str := "foobar"
t.Errorf("got %d and expected to panic, but didn't", testInt64Index_ssa(str, 1<<32+1))
}
func testInt64SlicePanic(t *testing.T) {
defer func() {
if r := recover(); r != nil {
//println("panicked as expected")
}
}()
str := "foobar"
t.Errorf("got %s and expected to panic, but didn't", testInt64Slice_ssa(str, 1<<32, 1<<32+1))
}
//go:noinline
func testStringElem_ssa(s string, i int) byte {
return s[i]
}
func testStringElem(t *testing.T) {
tests := []struct {
s string
i int
n byte
}{
{"foobar", 3, 98},
{"foobar", 0, 102},
{"foobar", 5, 114},
}
for _, test := range tests {
if got := testStringElem_ssa(test.s, test.i); got != test.n {
t.Errorf("testStringElem \"%s\"[%d] = %d, wanted %d", test.s, test.i, got, test.n)
}
}
}
//go:noinline
func testStringElemConst_ssa(i int) byte {
s := "foobar"
return s[i]
}
func testStringElemConst(t *testing.T) {
if got := testStringElemConst_ssa(3); got != 98 {
t.Errorf("testStringElemConst= %d, wanted 98", got)
}
}
func TestString(t *testing.T) {
testStringSlice(t)
testStringSlicePanic(t)
testStructSlice(t)
testSmallIndexType(t)
testStringElem(t)
testStringElemConst(t)
testInt64Index(t)
testInt64IndexPanic(t)
testInt64SlicePanic(t)
}
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