go handle_test 源码
golang handle_test 代码
文件路径：/src/runtime/cgo/handle_test.go
// Copyright 2021 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.
package cgo
import (
"reflect"
"testing"
)
func TestHandle(t *testing.T) {
v := 42
tests := []struct {
v1 any
v2 any
}{
{v1: v, v2: v},
{v1: &v, v2: &v},
{v1: nil, v2: nil},
}
for _, tt := range tests {
h1 := NewHandle(tt.v1)
h2 := NewHandle(tt.v2)
if uintptr(h1) == 0 || uintptr(h2) == 0 {
t.Fatalf("NewHandle returns zero")
}
if uintptr(h1) == uintptr(h2) {
t.Fatalf("Duplicated Go values should have different handles, but got equal")
}
h1v := h1.Value()
h2v := h2.Value()
if !reflect.DeepEqual(h1v, h2v) || !reflect.DeepEqual(h1v, tt.v1) {
t.Fatalf("Value of a Handle got wrong, got %+v %+v, want %+v", h1v, h2v, tt.v1)
}
h1.Delete()
h2.Delete()
}
siz := 0
handles.Range(func(k, v any) bool {
siz++
return true
})
if siz != 0 {
t.Fatalf("handles are not cleared, got %d, want %d", siz, 0)
}
}
func TestInvalidHandle(t *testing.T) {
t.Run("zero", func(t *testing.T) {
h := Handle(0)
defer func() {
if r := recover(); r != nil {
return
}
t.Fatalf("Delete of zero handle did not trigger a panic")
}()
h.Delete()
})
t.Run("invalid", func(t *testing.T) {
h := NewHandle(42)
defer func() {
if r := recover(); r != nil {
h.Delete()
return
}
t.Fatalf("Invalid handle did not trigger a panic")
}()
Handle(h + 1).Delete()
})
}
func BenchmarkHandle(b *testing.B) {
b.Run("non-concurrent", func(b *testing.B) {
for i := 0; i < b.N; i++ {
h := NewHandle(i)
_ = h.Value()
h.Delete()
}
})
b.Run("concurrent", func(b *testing.B) {
b.RunParallel(func(pb *testing.PB) {
var v int
for pb.Next() {
h := NewHandle(v)
_ = h.Value()
h.Delete()
}
})
})
}
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