134 lines
2.9 KiB
Go
134 lines
2.9 KiB
Go
//go:build llgo
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/*
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* Copyright (c) 2025 The GoPlus Authors (goplus.org). All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package test
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import (
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"reflect"
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"strconv"
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"testing"
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)
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// runLoopDefers exercises a defer statement inside a loop and relies on
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// defers executing after the loop but before the function returns.
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func runLoopDefers() (result []int) {
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for i := 0; i < 3; i++ {
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v := i
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defer func() {
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result = append(result, v)
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}()
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}
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return
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}
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func runLoopDeferCount(n int) (count int) {
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for i := 0; i < n; i++ {
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defer func() {
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count++
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}()
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}
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return
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}
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func runDeferRecover() (recovered any, ran bool) {
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defer func() {
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recovered = recover()
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ran = true
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}()
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panic("defer recover sentinel")
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}
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func runNestedLoopDeferOrder() (order []string) {
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outerNestedLoop(&order)
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return
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}
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func outerNestedLoop(order *[]string) {
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for i := 0; i < 3; i++ {
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v := i
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label := "outer:" + strconv.Itoa(v)
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defer func(label string) {
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*order = append(*order, label)
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}(label)
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}
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middleNestedLoop(order)
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}
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func middleNestedLoop(order *[]string) {
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for i := 0; i < 2; i++ {
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v := i
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label := "middle:" + strconv.Itoa(v)
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defer func(label string) {
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*order = append(*order, label)
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}(label)
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}
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innerNestedLoop(order)
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}
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func innerNestedLoop(order *[]string) {
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for i := 0; i < 4; i++ {
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v := i
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label := "inner:" + strconv.Itoa(v)
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defer func(label string) {
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*order = append(*order, label)
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}(label)
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}
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}
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func TestDeferInLoopOrder(t *testing.T) {
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got := runLoopDefers()
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want := []int{2, 1, 0}
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if !reflect.DeepEqual(got, want) {
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t.Fatalf("unexpected defer order: got %v, want %v", got, want)
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}
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}
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func TestDeferLoopStress(t *testing.T) {
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const n = 1_000_000
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if got := runLoopDeferCount(n); got != n {
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t.Fatalf("unexpected count: got %d, want %d", got, n)
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}
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}
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func TestDeferRecoverHandlesPanic(t *testing.T) {
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got, ran := runDeferRecover()
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want := "defer recover sentinel"
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if !ran {
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t.Fatalf("recover defer not executed")
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}
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str, ok := got.(string)
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if !ok {
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t.Fatalf("recover returned %T, want string", got)
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}
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if str != want {
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t.Fatalf("unexpected recover value: got %q, want %q", str, want)
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}
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}
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func TestNestedDeferLoops(t *testing.T) {
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got := runNestedLoopDeferOrder()
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want := []string{
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"inner:3", "inner:2", "inner:1", "inner:0",
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"middle:1", "middle:0",
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"outer:2", "outer:1", "outer:0",
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}
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if !reflect.DeepEqual(got, want) {
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t.Fatalf("unexpected nested order: got %v, want %v", got, want)
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}
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}
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