141 lines
2.7 KiB
Go
141 lines
2.7 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
|
|
// SPDX-License-Identifier: BSD-3-Clause
|
|
|
|
package lazy
|
|
|
|
import (
|
|
"errors"
|
|
"testing"
|
|
)
|
|
|
|
func fortyTwo() int { return 42 }
|
|
|
|
func TestGValue(t *testing.T) {
|
|
var lt GValue[int]
|
|
n := int(testing.AllocsPerRun(1000, func() {
|
|
got := lt.Get(fortyTwo)
|
|
if got != 42 {
|
|
t.Fatalf("got %v; want 42", got)
|
|
}
|
|
}))
|
|
if n != 0 {
|
|
t.Errorf("allocs = %v; want 0", n)
|
|
}
|
|
}
|
|
|
|
func TestGValueErr(t *testing.T) {
|
|
var lt GValue[int]
|
|
n := int(testing.AllocsPerRun(1000, func() {
|
|
got, err := lt.GetErr(func() (int, error) {
|
|
return 42, nil
|
|
})
|
|
if got != 42 || err != nil {
|
|
t.Fatalf("got %v, %v; want 42, nil", got, err)
|
|
}
|
|
}))
|
|
if n != 0 {
|
|
t.Errorf("allocs = %v; want 0", n)
|
|
}
|
|
|
|
var lterr GValue[int]
|
|
wantErr := errors.New("test error")
|
|
n = int(testing.AllocsPerRun(1000, func() {
|
|
got, err := lterr.GetErr(func() (int, error) {
|
|
return 0, wantErr
|
|
})
|
|
if got != 0 || err != wantErr {
|
|
t.Fatalf("got %v, %v; want 0, %v", got, err, wantErr)
|
|
}
|
|
}))
|
|
if n != 0 {
|
|
t.Errorf("allocs = %v; want 0", n)
|
|
}
|
|
}
|
|
|
|
func TestGValueSet(t *testing.T) {
|
|
var lt GValue[int]
|
|
if !lt.Set(42) {
|
|
t.Fatalf("Set failed")
|
|
}
|
|
if lt.Set(43) {
|
|
t.Fatalf("Set succeeded after first Set")
|
|
}
|
|
n := int(testing.AllocsPerRun(1000, func() {
|
|
got := lt.Get(fortyTwo)
|
|
if got != 42 {
|
|
t.Fatalf("got %v; want 42", got)
|
|
}
|
|
}))
|
|
if n != 0 {
|
|
t.Errorf("allocs = %v; want 0", n)
|
|
}
|
|
}
|
|
|
|
func TestGValueMustSet(t *testing.T) {
|
|
var lt GValue[int]
|
|
lt.MustSet(42)
|
|
defer func() {
|
|
if e := recover(); e == nil {
|
|
t.Errorf("unexpected success; want panic")
|
|
}
|
|
}()
|
|
lt.MustSet(43)
|
|
}
|
|
|
|
func TestGValueRecursivePanic(t *testing.T) {
|
|
defer func() {
|
|
if e := recover(); e != nil {
|
|
t.Logf("got panic, as expected")
|
|
} else {
|
|
t.Errorf("unexpected success; want panic")
|
|
}
|
|
}()
|
|
v := GValue[int]{}
|
|
v.Get(func() int {
|
|
return v.Get(func() int { return 42 })
|
|
})
|
|
}
|
|
|
|
func TestGFunc(t *testing.T) {
|
|
f := GFunc(fortyTwo)
|
|
|
|
n := int(testing.AllocsPerRun(1000, func() {
|
|
got := f()
|
|
if got != 42 {
|
|
t.Fatalf("got %v; want 42", got)
|
|
}
|
|
}))
|
|
if n != 0 {
|
|
t.Errorf("allocs = %v; want 0", n)
|
|
}
|
|
}
|
|
|
|
func TestGFuncErr(t *testing.T) {
|
|
f := GFuncErr(func() (int, error) {
|
|
return 42, nil
|
|
})
|
|
n := int(testing.AllocsPerRun(1000, func() {
|
|
got, err := f()
|
|
if got != 42 || err != nil {
|
|
t.Fatalf("got %v, %v; want 42, nil", got, err)
|
|
}
|
|
}))
|
|
if n != 0 {
|
|
t.Errorf("allocs = %v; want 0", n)
|
|
}
|
|
|
|
wantErr := errors.New("test error")
|
|
f = GFuncErr(func() (int, error) {
|
|
return 0, wantErr
|
|
})
|
|
n = int(testing.AllocsPerRun(1000, func() {
|
|
got, err := f()
|
|
if got != 0 || err != wantErr {
|
|
t.Fatalf("got %v, %v; want 0, %v", got, err, wantErr)
|
|
}
|
|
}))
|
|
if n != 0 {
|
|
t.Errorf("allocs = %v; want 0", n)
|
|
}
|
|
}
|