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corptrs_test.go
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// Copyright 2022 phelmkamp. All rights reserved.
// Use of this source code is governed by a MIT
// license that can be found in the LICENSE file.
package corptrs_test
import (
"fmt"
"reflect"
"testing"
"github.com/phelmkamp/immut/corptrs"
)
type big struct {
a, b, c, d, e int
}
func fn1(b corptrs.Pointer[big]) {
fn2(b)
}
func fn2(b corptrs.Pointer[big]) {
fn3(b)
}
func fn3(b corptrs.Pointer[big]) {
fn4(b)
}
func fn4(b corptrs.Pointer[big]) {
fn5(b)
}
func fn5(b corptrs.Pointer[big]) {
b2 := b.Clone()
b2.e++
fmt.Println(b2)
}
func Example() {
b := big{1, 2, 3, 4, 5}
p := corptrs.Freeze(&b)
fn1(p)
fmt.Println(p)
// Output: &{1 2 3 4 6}
// &{1 2 3 4 5}
}
func TestPointer_Clone(t *testing.T) {
type fields struct {
p *big
}
tests := []struct {
name string
fields fields
want *big
}{
{
name: "nil",
fields: fields{
p: nil,
},
want: nil,
},
{
name: "non-nil",
fields: fields{
p: &big{1, 2, 3, 4, 5},
},
want: &big{1, 2, 3, 4, 5},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
p := corptrs.Freeze(tt.fields.p)
if got := p.Clone(); !reflect.DeepEqual(got, tt.want) {
t.Errorf("Clone() = %v, want %v", got, tt.want)
}
})
}
}
func TestPointer_IsNil(t *testing.T) {
type fields struct {
p *big
}
tests := []struct {
name string
fields fields
want bool
}{
{
name: "nil",
fields: fields{
p: nil,
},
want: true,
},
{
name: "non-nil",
fields: fields{
p: &big{},
},
want: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
p := corptrs.Freeze(tt.fields.p)
if got := p.IsNil(); got != tt.want {
t.Errorf("IsNil() = %v, want %v", got, tt.want)
}
})
}
}
func TestPointer_String(t *testing.T) {
type fields struct {
p *big
}
tests := []struct {
name string
fields fields
want string
}{
{
name: "nil",
fields: fields{
p: nil,
},
want: "<nil>",
},
{
name: "non-nil",
fields: fields{
p: &big{1, 2, 3, 4, 5},
},
want: "&{1 2 3 4 5}",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
p := corptrs.Freeze(tt.fields.p)
if got := p.String(); got != tt.want {
t.Errorf("String() = %v, want %v", got, tt.want)
}
})
}
}