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llgo/test/defer_test.go

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2025-10-15 13:36:52 +08:00
//go:build llgo
/*
* Copyright (c) 2025 The GoPlus Authors (goplus.org). All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package test
import (
"reflect"
"testing"
)
// runLoopDefers exercises a defer statement inside a loop and relies on
// defers executing after the loop but before the function returns.
func runLoopDefers() (result []int) {
for i := 0; i < 3; i++ {
v := i
defer func() {
result = append(result, v)
}()
}
return
}
func runLoopDeferCount(n int) (count int) {
for i := 0; i < n; i++ {
defer func() {
count++
}()
}
return
}
func TestDeferInLoopOrder(t *testing.T) {
got := runLoopDefers()
want := []int{2, 1, 0}
if !reflect.DeepEqual(got, want) {
t.Fatalf("unexpected defer order: got %v, want %v", got, want)
}
}
func TestDeferLoopStress(t *testing.T) {
const n = 1_000_000
if got := runLoopDeferCount(n); got != n {
t.Fatalf("unexpected count: got %d, want %d", got, n)
}
}