123 lines
2.4 KiB
Go
123 lines
2.4 KiB
Go
package dataext
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import (
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"context"
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"sync"
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"sync/atomic"
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"testing"
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"time"
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)
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func TestCASMutex_LockUnlock(t *testing.T) {
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m := NewCASMutex()
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m.Lock()
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m.Unlock()
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}
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func TestCASMutex_TryLock(t *testing.T) {
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m := NewCASMutex()
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if !m.TryLock() {
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t.Fatal("TryLock should succeed on fresh mutex")
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}
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if m.TryLock() {
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t.Fatal("TryLock should fail when already locked")
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}
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m.Unlock()
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if !m.TryLock() {
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t.Fatal("TryLock should succeed after Unlock")
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}
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m.Unlock()
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}
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func TestCASMutex_TryLockWithTimeout(t *testing.T) {
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m := NewCASMutex()
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m.Lock()
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start := time.Now()
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if m.TryLockWithTimeout(20 * time.Millisecond) {
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t.Fatal("TryLockWithTimeout should fail when locked")
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}
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if time.Since(start) < 15*time.Millisecond {
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t.Fatal("TryLockWithTimeout returned too quickly")
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}
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m.Unlock()
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if !m.TryLockWithTimeout(50 * time.Millisecond) {
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t.Fatal("TryLockWithTimeout should succeed when unlocked")
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}
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m.Unlock()
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}
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func TestCASMutex_TryLockWithContext_Cancel(t *testing.T) {
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m := NewCASMutex()
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m.Lock()
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defer m.Unlock()
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ctx, cancel := context.WithCancel(context.Background())
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go func() {
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time.Sleep(10 * time.Millisecond)
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cancel()
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}()
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if m.TryLockWithContext(ctx) {
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t.Fatal("expected lock to fail after cancel")
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}
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}
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func TestCASMutex_RLockMultiple(t *testing.T) {
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m := NewCASMutex()
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if !m.RTryLock() {
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t.Fatal("RTryLock should succeed")
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}
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if !m.RTryLock() {
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t.Fatal("Second RTryLock should succeed")
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}
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if m.TryLock() {
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t.Fatal("Write TryLock should fail with read locks held")
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}
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m.RUnlock()
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m.RUnlock()
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if !m.TryLock() {
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t.Fatal("Write TryLock should succeed after read unlocks")
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}
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m.Unlock()
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}
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func TestCASMutex_RLocker(t *testing.T) {
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m := NewCASMutex()
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rl := m.RLocker()
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rl.Lock()
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rl.Unlock()
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}
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func TestCASMutex_Concurrent(t *testing.T) {
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m := NewCASMutex()
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var counter int64
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const n = 50
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var wg sync.WaitGroup
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wg.Add(n)
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for i := 0; i < n; i++ {
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go func() {
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defer wg.Done()
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m.Lock()
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atomic.AddInt64(&counter, 1)
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m.Unlock()
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}()
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}
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wg.Wait()
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if atomic.LoadInt64(&counter) != n {
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t.Fatalf("counter=%d want %d", counter, n)
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}
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}
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func TestCASMutex_RTryLockWithTimeout(t *testing.T) {
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m := NewCASMutex()
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m.Lock()
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if m.RTryLockWithTimeout(20 * time.Millisecond) {
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t.Fatal("RTryLockWithTimeout should fail when write-locked")
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}
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m.Unlock()
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if !m.RTryLockWithTimeout(20 * time.Millisecond) {
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t.Fatal("RTryLockWithTimeout should succeed when free")
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}
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m.RUnlock()
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}
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