hugo/lazy/init_test.go

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// Copyright 2019 The Hugo Authors. 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 lazy
import (
"context"
"errors"
"math/rand"
"strings"
"sync"
"testing"
"time"
"github.com/stretchr/testify/require"
)
var (
rnd = rand.New(rand.NewSource(time.Now().UnixNano()))
bigOrSmall = func() int {
if rnd.Intn(10) < 5 {
return 10000 + rnd.Intn(100000)
}
return 1 + rnd.Intn(50)
}
)
func doWork() {
doWorkOfSize(bigOrSmall())
}
func doWorkOfSize(size int) {
_ = strings.Repeat("Hugo Rocks! ", size)
}
func TestInit(t *testing.T) {
assert := require.New(t)
var result string
f1 := func(name string) func() (interface{}, error) {
return func() (interface{}, error) {
result += name + "|"
doWork()
return name, nil
}
}
f2 := func() func() (interface{}, error) {
return func() (interface{}, error) {
doWork()
return nil, nil
}
}
root := New()
root.Add(f1("root(1)"))
root.Add(f1("root(2)"))
branch1 := root.Branch(f1("branch_1"))
branch1.Add(f1("branch_1_1"))
branch1_2 := branch1.Add(f1("branch_1_2"))
branch1_2_1 := branch1_2.Add(f1("branch_1_2_1"))
var wg sync.WaitGroup
// Add some concurrency and randomness to verify thread safety and
// init order.
for i := 0; i < 100; i++ {
wg.Add(1)
go func(i int) {
defer wg.Done()
var err error
if rnd.Intn(10) < 5 {
_, err = root.Do()
assert.NoError(err)
}
// Add a new branch on the fly.
if rnd.Intn(10) > 5 {
branch := branch1_2.Branch(f2())
_, err = branch.Do()
assert.NoError(err)
} else {
_, err = branch1_2_1.Do()
assert.NoError(err)
}
_, err = branch1_2.Do()
assert.NoError(err)
}(i)
wg.Wait()
assert.Equal("root(1)|root(2)|branch_1|branch_1_1|branch_1_2|branch_1_2_1|", result)
}
}
func TestInitAddWithTimeout(t *testing.T) {
assert := require.New(t)
init := New().AddWithTimeout(100*time.Millisecond, func(ctx context.Context) (interface{}, error) {
return nil, nil
})
_, err := init.Do()
assert.NoError(err)
}
func TestInitAddWithTimeoutTimeout(t *testing.T) {
assert := require.New(t)
init := New().AddWithTimeout(100*time.Millisecond, func(ctx context.Context) (interface{}, error) {
time.Sleep(500 * time.Millisecond)
select {
case <-ctx.Done():
return nil, nil
default:
}
t.Fatal("slept")
return nil, nil
})
_, err := init.Do()
assert.Error(err)
assert.Contains(err.Error(), "timed out")
time.Sleep(1 * time.Second)
}
func TestInitAddWithTimeoutError(t *testing.T) {
assert := require.New(t)
init := New().AddWithTimeout(100*time.Millisecond, func(ctx context.Context) (interface{}, error) {
return nil, errors.New("failed")
})
_, err := init.Do()
assert.Error(err)
}
type T struct {
sync.Mutex
V1 string
V2 string
}
func (t *T) Add1(v string) {
t.Lock()
t.V1 += v
t.Unlock()
}
func (t *T) Add2(v string) {
t.Lock()
t.V2 += v
t.Unlock()
}
// https://github.com/gohugoio/hugo/issues/5901
func TestInitBranchOrder(t *testing.T) {
assert := require.New(t)
base := New()
work := func(size int, f func()) func() (interface{}, error) {
return func() (interface{}, error) {
doWorkOfSize(size)
if f != nil {
f()
}
return nil, nil
}
}
state := &T{}
base = base.Add(work(10000, func() {
state.Add1("A")
}))
inits := make([]*Init, 2)
for i := range inits {
inits[i] = base.Branch(work(i+1*100, func() {
// V1 is A
ab := state.V1 + "B"
state.Add2(ab)
}))
}
var wg sync.WaitGroup
for _, v := range inits {
v := v
wg.Add(1)
go func() {
defer wg.Done()
_, err := v.Do()
assert.NoError(err)
}()
}
wg.Wait()
assert.Equal("ABAB", state.V2)
}