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/*
Copyright 2023 The Kubernetes Authors.
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 ptr_test
import (
"fmt"
"testing"
"k8s.io/utils/ptr"
)
func TestAllPtrFieldsNil(t *testing.T) {
testCases := []struct {
obj interface{}
expected bool
}{
{struct{}{}, true},
{struct{ Foo int }{12345}, true},
{&struct{ Foo int }{12345}, true},
{struct{ Foo *int }{nil}, true},
{&struct{ Foo *int }{nil}, true},
{struct {
Foo int
Bar *int
}{12345, nil}, true},
{&struct {
Foo int
Bar *int
}{12345, nil}, true},
{struct {
Foo *int
Bar *int
}{nil, nil}, true},
{&struct {
Foo *int
Bar *int
}{nil, nil}, true},
{struct{ Foo *int }{new(int)}, false},
{&struct{ Foo *int }{new(int)}, false},
{struct {
Foo *int
Bar *int
}{nil, new(int)}, false},
{&struct {
Foo *int
Bar *int
}{nil, new(int)}, false},
{(*struct{})(nil), true},
}
for i, tc := range testCases {
name := fmt.Sprintf("case[%d]", i)
t.Run(name, func(t *testing.T) {
if actual := ptr.AllPtrFieldsNil(tc.obj); actual != tc.expected {
t.Errorf("%s: expected %t, got %t", name, tc.expected, actual)
}
})
}
}
func TestRef(t *testing.T) {
type T int
val := T(0)
pointer := ptr.To(val)
if *pointer != val {
t.Errorf("expected %d, got %d", val, *pointer)
}
val = T(1)
pointer = ptr.To(val)
if *pointer != val {
t.Errorf("expected %d, got %d", val, *pointer)
}
}
func TestDeref(t *testing.T) {
type T int
var val, def T = 1, 0
out := ptr.Deref(&val, def)
if out != val {
t.Errorf("expected %d, got %d", val, out)
}
out = ptr.Deref(nil, def)
if out != def {
t.Errorf("expected %d, got %d", def, out)
}
}
func TestEqual(t *testing.T) {
type T int
if !ptr.Equal[T](nil, nil) {
t.Errorf("expected true (nil == nil)")
}
if !ptr.Equal(ptr.To(T(123)), ptr.To(T(123))) {
t.Errorf("expected true (val == val)")
}
if ptr.Equal(nil, ptr.To(T(123))) {
t.Errorf("expected false (nil != val)")
}
if ptr.Equal(ptr.To(T(123)), nil) {
t.Errorf("expected false (val != nil)")
}
if ptr.Equal(ptr.To(T(123)), ptr.To(T(456))) {
t.Errorf("expected false (val != val)")
}
}
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