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sync_test.go
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package utils
import (
"sort"
"sync"
"testing"
"github.com/stretchr/testify/require"
)
func TestSyncMap_InitialState(t *testing.T) {
var m SyncMap[string, int]
require.Equal(t, 0, m.Len())
require.EqualValues(t, []string{}, m.Keys())
require.EqualValues(t, []int{}, m.Values())
}
func TestSyncMap_Clone(t *testing.T) {
var m SyncMap[string, int]
const key1, key2, val1, val2 = "a", "b", 111, 222
m.Store(key1, val1)
require.Equal(t, 1, m.Len())
require.EqualValues(t, []string{key1}, m.Keys())
require.EqualValues(t, []int{val1}, m.Values())
v, loaded := m.Load(key1)
require.True(t, loaded)
require.EqualValues(t, val1, v)
v, loaded = m.Load(key2)
require.False(t, loaded)
require.EqualValues(t, 0, v)
var clone = m.Clone()
require.EqualValues(t, m.Len(), clone.Len())
v, loaded = clone.Load(key1)
require.True(t, loaded)
require.EqualValues(t, val1, v)
m.Store(key1, val2) // overwrite in original map
v, loaded = clone.Load(key1)
require.True(t, loaded)
require.EqualValues(t, val1, v)
v, loaded = m.Load(key1)
require.True(t, loaded)
require.EqualValues(t, val2, v)
}
func TestSyncMap_Grow(t *testing.T) {
var m SyncMap[string, int]
require.EqualValues(t, 0, m.Len())
m.Grow(3)
require.EqualValues(t, 0, m.Len())
}
func TestSyncMap_Load(t *testing.T) {
var m SyncMap[string, int]
const key = "a"
value, ok := m.Load(key) // not exists
require.False(t, ok)
require.EqualValues(t, 0, value)
m.Store(key, 111)
m.Store(key, 111)
m.Store(key, 111) // repeated call
value, ok = m.Load(key) // exists
require.True(t, ok)
require.EqualValues(t, 111, value)
}
func TestSyncMap_Store(t *testing.T) {
var m SyncMap[string, int]
m.Grow(2)
const (
key1, key2 = "a", "b"
val1, val2 = 123, 321
)
m.Store(key1, val1)
require.Equal(t, 1, m.Len())
require.EqualValues(t, []string{key1}, m.Keys())
require.EqualValues(t, []int{val1}, m.Values())
m.Store(key2, val2)
m.Store(key2, val2) // repeated call
require.Equal(t, 2, m.Len())
var wantKeys, gotKeys = []string{key2, key1}, m.Keys()
sort.Strings(wantKeys)
sort.Strings(gotKeys)
require.EqualValues(t, wantKeys, gotKeys)
var wantValues, gotValues = []int{val1, val2}, m.Values()
sort.Ints(wantValues)
sort.Ints(gotValues)
require.EqualValues(t, wantValues, gotValues)
}
func TestSyncMap_LoadOrStore(t *testing.T) {
var m SyncMap[string, float64]
const (
key = "a"
val1, val2 = 123.123, 321.321
)
v, loaded := m.LoadOrStore(key, val1)
require.False(t, loaded)
require.EqualValues(t, val1, v)
require.Equal(t, 1, m.Len())
v, loaded = m.LoadOrStore(key, val2) // another value is passed
require.True(t, loaded)
require.EqualValues(t, val1, v)
require.Equal(t, 1, m.Len())
}
func TestSyncMap_LoadAndDelete(t *testing.T) {
var m SyncMap[string, int]
const key, val = "a", 123
v, loaded := m.LoadAndDelete(key)
require.False(t, loaded)
require.EqualValues(t, 0, v)
m.Store(key, val)
require.Equal(t, 1, m.Len())
require.EqualValues(t, []string{key}, m.Keys())
require.EqualValues(t, []int{val}, m.Values())
v, loaded = m.LoadAndDelete(key)
require.True(t, loaded)
require.EqualValues(t, val, v)
require.Equal(t, 0, m.Len())
require.EqualValues(t, []string{}, m.Keys())
require.EqualValues(t, []int{}, m.Values())
v, loaded = m.LoadAndDelete(key) //nolint:ineffassign
v, loaded = m.LoadAndDelete(key) //nolint:ineffassign
v, loaded = m.LoadAndDelete(key) // repeated call
require.False(t, loaded)
require.EqualValues(t, 0, v)
require.Equal(t, 0, m.Len())
require.EqualValues(t, []string{}, m.Keys())
require.EqualValues(t, []int{}, m.Values())
}
func TestSyncMap_Delete(t *testing.T) {
var m SyncMap[string, int]
const key, val = "a", 123
m.Delete(key)
m.Delete(key) // repeated call
require.Equal(t, 0, m.Len())
require.EqualValues(t, []string{}, m.Keys())
require.EqualValues(t, []int{}, m.Values())
m.Store(key, val)
require.Equal(t, 1, m.Len())
require.EqualValues(t, []string{key}, m.Keys())
require.EqualValues(t, []int{val}, m.Values())
m.Delete(key)
m.Delete(key)
m.Delete(key) // repeated call
require.Equal(t, 0, m.Len())
require.EqualValues(t, []string{}, m.Keys())
require.EqualValues(t, []int{}, m.Values())
}
func TestSyncMap_Range(t *testing.T) {
var m SyncMap[string, int]
const (
key1, key2 = "a", "b"
val1, val2 = 123, 321
)
var iter uint
m.Range(func(key string, val int) bool {
iter++
return false
})
require.EqualValues(t, 0, iter)
iter = 0 // reset
m.Store(key1, val1)
m.Store(key1, val1) // repeated call
m.Store(key2, val2)
m.Store(key2, val2) // repeated call
require.Equal(t, 2, m.Len())
m.Range(func(key string, val int) bool {
if key == key1 {
require.EqualValues(t, val1, val)
} else if key == key2 {
require.EqualValues(t, val2, val)
}
iter++
return true
})
require.EqualValues(t, 2, iter)
iter = 0 // reset
m.Range(func(key string, val int) bool {
iter++
return false
})
require.EqualValues(t, 1, iter)
}
func TestSyncMap_Struct(t *testing.T) {
type some struct{ foo string }
m := SyncMap[[2]int, some]{}
require.Equal(t, 0, m.Len())
var key = [2]int{1, 2}
val, ok := m.Load(key)
require.False(t, ok)
require.EqualValues(t, some{}, val) // NOT nil
m.Store(key, some{"bar"})
require.Equal(t, 1, m.Len())
val, ok = m.Load(key)
require.True(t, ok)
require.EqualValues(t, some{"bar"}, val)
}
func TestSyncMap_Map(t *testing.T) {
type some map[uint]sync.Mutex
m := SyncMap[uint, *some]{}
require.Equal(t, 0, m.Len())
var key uint = 1
val, ok := m.Load(key)
require.False(t, ok)
require.Nil(t, val) // nil here is correct
var mu sync.Mutex
m.Store(key, &some{1: mu}) //nolint:govet
require.Equal(t, 1, m.Len())
val, ok = m.Load(key)
require.True(t, ok)
require.EqualValues(t, &some{1: mu}, val) //nolint:govet
}
//go:noinline
func TestNoCopy_ConcurrentUsage(t *testing.T) { // race detector provocation
var (
m SyncMap[string, int]
wg sync.WaitGroup
)
for i := 0; i < 100; i++ {
wg.Add(12)
go func() { defer wg.Done(); m.Grow(3) }()
go func() { defer wg.Done(); _, _ = m.LoadOrStore("foo", 1) }() // +
go func() { defer wg.Done(); m.Store("foo", 1) }() // +
go func() { defer wg.Done(); _, _ = m.Load("foo") }()
go func() { defer wg.Done(); _, _ = m.LoadAndDelete("foo") }() // -
go func() { defer wg.Done(); m.Delete("foo") }() // -
go func() { defer wg.Done(); m.Range(func(_ string, _ int) bool { return true }) }()
go func() { defer wg.Done(); m.Range(func(_ string, _ int) bool { return false }) }()
go func() { defer wg.Done(); _ = m.Len() }()
go func() { defer wg.Done(); _ = m.Keys() }()
go func() { defer wg.Done(); _ = m.Values() }()
go func() { defer wg.Done(); _ = m.Clone() }()
}
wg.Wait()
}
// BenchmarkSyncMap_NativeMapMutex-8 20247865 60.29 ns/op 0 B/op 0 allocs/op
// BenchmarkSyncMap_SyncMapUnderTheHood-8 9286198 131.2 ns/op 32 B/op 2 allocs/op
func BenchmarkSyncMap_NativeMap(b *testing.B) {
b.ReportAllocs()
var (
m = SyncMap[string, int]{}
v, ok = 0, false
)
const key = "a"
for i := 0; i < b.N; i++ {
m.Store(key, 1)
v, ok = m.Load(key)
m.Delete(key)
}
require.True(b, ok)
require.EqualValues(b, 1, v)
}
// BenchmarkSyncMap_Stdlib-8 13189734 93.28 ns/op 16 B/op 1 allocs/op
func BenchmarkSyncMap_Stdlib(b *testing.B) {
b.ReportAllocs()
var (
m = sync.Map{}
v, ok any = 0, false
)
const key = "a"
for i := 0; i < b.N; i++ {
m.Store(key, 1)
v, ok = m.Load(key)
m.Delete(key)
}
require.True(b, ok.(bool))
require.EqualValues(b, 1, v)
}