Codebase list golang-github-renekroon-ttlcache / upstream/2.0.0+ds cache_test.go
upstream/2.0.0+ds

Tree @upstream/2.0.0+ds (Download .tar.gz)

cache_test.go @upstream/2.0.0+ds

2161962
d1510c8
 
ad9a3b4
2161962
d1510c8
 
 
0634dc9
 
d1510c8
 
 
2161962
d1510c8
 
 
0634dc9
 
 
 
2161962
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
aa8a254
 
2161962
aa8a254
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2161962
aa8a254
2161962
aa8a254
 
 
 
 
 
 
 
 
 
2161962
 
 
 
 
 
 
aa8a254
2161962
aa8a254
2161962
 
 
 
 
 
 
 
aa8a254
2161962
aa8a254
0634dc9
 
 
2161962
0634dc9
 
 
 
2161962
0634dc9
 
 
2161962
0634dc9
 
 
 
 
 
2161962
0634dc9
 
d1510c8
 
 
2161962
 
d1510c8
0634dc9
 
d1510c8
 
2161962
d1510c8
 
 
2161962
d1510c8
 
 
 
 
2161962
d1510c8
 
2161962
d1510c8
 
 
ad9a3b4
2161962
 
ad9a3b4
0634dc9
 
ad9a3b4
2161962
ad9a3b4
 
 
 
 
 
 
 
 
 
 
 
 
0634dc9
ad9a3b4
0634dc9
ad9a3b4
 
 
 
 
 
 
 
 
 
 
 
 
0634dc9
ad9a3b4
 
 
 
 
 
 
 
 
 
d1510c8
 
0634dc9
 
d1510c8
2161962
d1510c8
 
 
 
 
 
 
 
 
 
ad9a3b4
 
 
0634dc9
ad9a3b4
0634dc9
ad9a3b4
d1510c8
ad9a3b4
d1510c8
 
 
 
 
 
 
 
ad9a3b4
 
0634dc9
d1510c8
ad9a3b4
d1510c8
 
 
 
 
 
 
 
 
 
 
2161962
 
d1510c8
 
 
 
0634dc9
 
d1510c8
 
 
0634dc9
d1510c8
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2161962
d1510c8
 
 
 
 
 
0634dc9
 
d1510c8
 
0634dc9
d1510c8
 
 
 
0634dc9
d1510c8
 
 
 
 
 
 
 
 
2161962
 
d1510c8
0634dc9
 
d1510c8
 
 
 
 
 
 
 
2161962
 
d1510c8
0634dc9
 
d1510c8
 
 
 
 
 
 
 
2161962
 
d1510c8
 
 
 
 
 
 
2161962
 
d1510c8
 
 
 
 
 
 
 
 
2161962
 
d1510c8
0634dc9
 
d1510c8
 
 
 
2161962
d1510c8
 
 
 
2161962
 
d1510c8
0634dc9
 
d1510c8
 
 
2161962
d1510c8
 
 
 
2161962
d1510c8
 
 
 
2161962
d1510c8
 
 
 
2161962
 
d1510c8
0634dc9
 
d1510c8
 
 
 
 
2161962
d1510c8
 
 
2161962
 
d1510c8
0634dc9
 
d1510c8
 
 
 
 
 
 
 
 
 
 
2161962
 
d1510c8
0634dc9
 
d1510c8
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2161962
 
d1510c8
0634dc9
 
d1510c8
2161962
d1510c8
 
 
 
 
2161962
d1510c8
 
 
 
2161962
 
d1510c8
 
 
 
0634dc9
 
d1510c8
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2161962
 
d1510c8
 
 
 
0634dc9
 
2161962
d1510c8
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2161962
 
d1510c8
 
0634dc9
 
d1510c8
 
 
 
 
 
 
 
 
 
 
 
2161962
 
d1510c8
0634dc9
 
d1510c8
 
 
 
 
 
2161962
 
d1510c8
 
 
2161962
 
d1510c8
0634dc9
 
d1510c8
 
 
 
 
2161962
d1510c8
 
 
 
2161962
 
d1510c8
0634dc9
 
d1510c8
 
 
 
 
 
 
 
 
 
 
 
 
 
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
package ttlcache_test

import (
	"math/rand"
	"sync/atomic"
	"testing"
	"time"

	"go.uber.org/goleak"

	"fmt"
	"sync"

	. "github.com/ReneKroon/ttlcache/v2"
	"github.com/stretchr/testify/assert"
)

func TestMain(m *testing.M) {
	goleak.VerifyTestMain(m)
}

// Issue #31: Test that a single fetch is executed with the loader function
func TestCache_TestSingleFetch(t *testing.T) {
	t.Parallel()
	cache := NewCache()
	defer cache.Close()

	var calls int32

	loader := func(key string) (data interface{}, ttl time.Duration, err error) {
		time.Sleep(time.Millisecond * 100)
		atomic.AddInt32(&calls, 1)
		return "data", 0, nil

	}

	cache.SetLoaderFunction(loader)
	wg := sync.WaitGroup{}

	for i := 0; i < 1000; i++ {
		wg.Add(1)
		go func() {
			cache.Get("1")
			wg.Done()
		}()
	}
	wg.Wait()

	assert.Equal(t, int32(1), calls)
}

// Issue #30: Removal does not use expiration callback.
func TestCache_TestRemovalTriggersCallback(t *testing.T) {
	t.Parallel()
	cache := NewCache()
	defer cache.Close()

	var sync = make(chan struct{})
	expiration := func(key string, data interface{}) {

		sync <- struct{}{}
	}
	cache.SetExpirationCallback(expiration)

	cache.Set("1", "barf")
	cache.Remove("1")

	<-sync
}

// Issue #31: loader function
func TestCache_TestLoaderFunction(t *testing.T) {
	t.Parallel()
	cache := NewCache()

	cache.SetLoaderFunction(func(key string) (data interface{}, ttl time.Duration, err error) {
		return nil, 0, ErrNotFound
	})

	_, err := cache.Get("1")
	assert.Equal(t, ErrNotFound, err)

	cache.SetLoaderFunction(func(key string) (data interface{}, ttl time.Duration, err error) {
		return "1", 0, nil
	})

	value, found := cache.Get("1")
	assert.Equal(t, nil, found)
	assert.Equal(t, "1", value)

	cache.Close()

	value, found = cache.Get("1")
	assert.Equal(t, ErrClosed, found)
	assert.Equal(t, nil, value)
}

// Issue #31: edge case where cache is closed when loader function has completed
func TestCache_TestLoaderFunctionDuringClose(t *testing.T) {
	t.Parallel()
	cache := NewCache()

	cache.SetLoaderFunction(func(key string) (data interface{}, ttl time.Duration, err error) {
		cache.Close()
		return "1", 0, nil
	})

	value, found := cache.Get("1")
	assert.Equal(t, ErrClosed, found)
	assert.Equal(t, nil, value)

	cache.Close()

}

// Issue #28: call expirationCallback automatically on cache.Close()
func TestCache_ExpirationOnClose(t *testing.T) {
	t.Parallel()
	cache := NewCache()

	success := make(chan struct{})
	defer close(success)

	cache.SetTTL(time.Hour * 100)
	cache.SetExpirationCallback(func(key string, value interface{}) {
		t.Logf("%s\t%v", key, value)
		success <- struct{}{}
	})
	cache.Set("1", 1)
	cache.Set("2", 1)
	cache.Set("3", 1)

	found := 0
	cache.Close()
	wait := time.NewTimer(time.Millisecond * 100)
	for found != 3 {
		select {
		case <-success:
			found++
		case <-wait.C:
			t.Fail()
		}
	}

}

// # Issue 29: After Close() the behaviour of Get, Set, Remove is not defined.

func TestCache_ModifyAfterClose(t *testing.T) {
	t.Parallel()
	cache := NewCache()

	cache.SetTTL(time.Hour * 100)
	cache.SetExpirationCallback(func(key string, value interface{}) {
		t.Logf("%s\t%v", key, value)
	})
	cache.Set("1", 1)
	cache.Set("2", 1)
	cache.Set("3", 1)

	_, findErr := cache.Get("1")
	assert.Equal(t, nil, findErr)
	assert.Equal(t, nil, cache.Set("broken", 1))
	assert.Equal(t, ErrNotFound, cache.Remove("broken2"))
	assert.Equal(t, nil, cache.Purge())
	assert.Equal(t, nil, cache.SetWithTTL("broken", 2, time.Minute))
	assert.Equal(t, nil, cache.SetTTL(time.Hour))

	cache.Close()

	_, getErr := cache.Get("broken3")
	assert.Equal(t, ErrClosed, getErr)
	assert.Equal(t, ErrClosed, cache.Set("broken", 1))
	assert.Equal(t, ErrClosed, cache.Remove("broken2"))
	assert.Equal(t, ErrClosed, cache.Purge())
	assert.Equal(t, ErrClosed, cache.SetWithTTL("broken", 2, time.Minute))
	assert.Equal(t, ErrClosed, cache.SetTTL(time.Hour))
	assert.Equal(t, 0, cache.Count())

}

// Issue #23: Goroutine leak on closing. When adding a close method i would like to see
// that it can be called in a repeated way without problems.
func TestCache_MultipleCloseCalls(t *testing.T) {
	t.Parallel()
	cache := NewCache()

	cache.SetTTL(time.Millisecond * 100)

	cache.SkipTTLExtensionOnHit(false)
	cache.Set("test", "!")
	startTime := time.Now()
	for now := time.Now(); now.Before(startTime.Add(time.Second * 3)); now = time.Now() {
		if _, err := cache.Get("test"); err != nil {
			t.Errorf("Item was not found, even though it should not expire.")
		}

	}

	cache.Close()
	assert.Equal(t, ErrClosed, cache.Close())
}

// test for Feature request in issue #12
//
func TestCache_SkipTtlExtensionOnHit(t *testing.T) {
	t.Parallel()

	cache := NewCache()
	defer cache.Close()

	cache.SetTTL(time.Millisecond * 100)

	cache.SkipTTLExtensionOnHit(false)
	cache.Set("test", "!")
	startTime := time.Now()
	for now := time.Now(); now.Before(startTime.Add(time.Second * 3)); now = time.Now() {
		if _, err := cache.Get("test"); err != nil {
			t.Errorf("Item was not found, even though it should not expire.")
		}

	}

	cache.SkipTTLExtensionOnHit(true)
	cache.Set("expireTest", "!")
	// will loop if item does not expire
	for _, err := cache.Get("expireTest"); err == nil; _, err = cache.Get("expireTest") {
	}
}

func TestCache_ForRacesAcrossGoroutines(t *testing.T) {
	t.Parallel()

	cache := NewCache()
	defer cache.Close()

	cache.SetTTL(time.Minute * 1)
	cache.SkipTTLExtensionOnHit(false)

	var wgSet sync.WaitGroup
	var wgGet sync.WaitGroup

	n := 500
	wgSet.Add(1)
	go func() {
		for i := 0; i < n; i++ {
			wgSet.Add(1)

			go func(i int) {
				time.Sleep(time.Nanosecond * time.Duration(rand.Int63n(1000000)))
				if i%2 == 0 {
					cache.Set(fmt.Sprintf("test%d", i/10), false)
				} else {
					cache.SetWithTTL(fmt.Sprintf("test%d", i/10), false, time.Second*59)
				}
				wgSet.Done()
			}(i)
		}
		wgSet.Done()
	}()
	wgGet.Add(1)
	go func() {
		for i := 0; i < n; i++ {
			wgGet.Add(1)

			go func(i int) {
				time.Sleep(time.Nanosecond * time.Duration(rand.Int63n(1000000)))
				cache.Get(fmt.Sprintf("test%d", i/10))
				wgGet.Done()
			}(i)
		}
		wgGet.Done()
	}()

	wgGet.Wait()
	wgSet.Wait()
}

func TestCache_SkipTtlExtensionOnHit_ForRacesAcrossGoroutines(t *testing.T) {
	cache := NewCache()
	defer cache.Close()

	cache.SetTTL(time.Minute * 1)
	cache.SkipTTLExtensionOnHit(true)

	var wgSet sync.WaitGroup
	var wgGet sync.WaitGroup

	n := 500
	wgSet.Add(1)
	go func() {
		for i := 0; i < n; i++ {
			wgSet.Add(1)

			go func(i int) {
				time.Sleep(time.Nanosecond * time.Duration(rand.Int63n(1000000)))
				if i%2 == 0 {
					cache.Set(fmt.Sprintf("test%d", i/10), false)
				} else {
					cache.SetWithTTL(fmt.Sprintf("test%d", i/10), false, time.Second*59)
				}
				wgSet.Done()
			}(i)
		}
		wgSet.Done()
	}()
	wgGet.Add(1)
	go func() {
		for i := 0; i < n; i++ {
			wgGet.Add(1)

			go func(i int) {
				time.Sleep(time.Nanosecond * time.Duration(rand.Int63n(1000000)))
				cache.Get(fmt.Sprintf("test%d", i/10))
				wgGet.Done()
			}(i)
		}
		wgGet.Done()
	}()

	wgGet.Wait()
	wgSet.Wait()
}

// test github issue #14
// Testing expiration callback would continue with the next item in list, even when it exceeds list lengths
func TestCache_SetCheckExpirationCallback(t *testing.T) {
	t.Parallel()

	iterated := 0
	ch := make(chan struct{})

	cacheAD := NewCache()
	defer cacheAD.Close()

	cacheAD.SetTTL(time.Millisecond)
	cacheAD.SetCheckExpirationCallback(func(key string, value interface{}) bool {
		v := value.(*int)
		t.Logf("key=%v, value=%d\n", key, *v)
		iterated++
		if iterated == 1 {
			// this is the breaking test case for issue #14
			return false
		}
		ch <- struct{}{}
		return true
	})

	i := 2
	cacheAD.Set("a", &i)

	<-ch
}

// test github issue #9
// Due to scheduling the expected TTL of the top entry can become negative (already expired)
// This is an issue because negative TTL at the item level was interpreted as 'use global TTL'
// Which is not right when we become negative due to scheduling.
// This test could use improvement as it's not requiring a lot of time to trigger.
func TestCache_SetExpirationCallback(t *testing.T) {
	t.Parallel()

	type A struct {
	}

	// Setup the TTL cache
	cache := NewCache()
	defer cache.Close()

	cache.SetTTL(time.Second * 1)
	cache.SetExpirationCallback(func(key string, value interface{}) {
		t.Logf("This key(%s) has expired\n", key)
	})
	for i := 0; i < 1024; i++ {
		cache.Set(fmt.Sprintf("item_%d", i), A{})
		time.Sleep(time.Millisecond * 10)
		t.Logf("Cache size: %d\n", cache.Count())
	}

	if cache.Count() > 100 {
		t.Fatal("Cache should empty entries >1 second old")
	}
}

// test github issue #4
func TestRemovalAndCountDoesNotPanic(t *testing.T) {
	t.Parallel()

	cache := NewCache()
	defer cache.Close()

	cache.Set("key", "value")
	cache.Remove("key")
	count := cache.Count()
	t.Logf("cache has %d keys\n", count)
}

// test github issue #3
func TestRemovalWithTtlDoesNotPanic(t *testing.T) {
	t.Parallel()

	cache := NewCache()
	defer cache.Close()

	cache.SetExpirationCallback(func(key string, value interface{}) {
		t.Logf("This key(%s) has expired\n", key)
	})

	cache.SetWithTTL("keyWithTTL", "value", time.Duration(2*time.Second))
	cache.Set("key", "value")
	cache.Remove("key")

	value, err := cache.Get("keyWithTTL")
	if err == nil {
		t.Logf("got %s for keyWithTTL\n", value)
	}
	count := cache.Count()
	t.Logf("cache has %d keys\n", count)

	<-time.After(3 * time.Second)

	value, err = cache.Get("keyWithTTL")
	if err != nil {
		t.Logf("got %s for keyWithTTL\n", value)
	} else {
		t.Logf("keyWithTTL has gone")
	}
	count = cache.Count()
	t.Logf("cache has %d keys\n", count)
}

func TestCacheIndividualExpirationBiggerThanGlobal(t *testing.T) {
	t.Parallel()

	cache := NewCache()
	defer cache.Close()

	cache.SetTTL(time.Duration(50 * time.Millisecond))
	cache.SetWithTTL("key", "value", time.Duration(100*time.Millisecond))
	<-time.After(150 * time.Millisecond)
	data, exists := cache.Get("key")
	assert.Equal(t, exists, ErrNotFound, "Expected item to not exist")
	assert.Nil(t, data, "Expected item to be nil")
}

func TestCacheGlobalExpirationByGlobal(t *testing.T) {
	t.Parallel()

	cache := NewCache()
	defer cache.Close()

	cache.Set("key", "value")
	<-time.After(50 * time.Millisecond)
	data, exists := cache.Get("key")
	assert.Equal(t, exists, nil, "Expected item to exist in cache")
	assert.Equal(t, data.(string), "value", "Expected item to have 'value' in value")

	cache.SetTTL(time.Duration(50 * time.Millisecond))
	data, exists = cache.Get("key")
	assert.Equal(t, exists, nil, "Expected item to exist in cache")
	assert.Equal(t, data.(string), "value", "Expected item to have 'value' in value")

	<-time.After(100 * time.Millisecond)
	data, exists = cache.Get("key")
	assert.Equal(t, exists, ErrNotFound, "Expected item to not exist")
	assert.Nil(t, data, "Expected item to be nil")
}

func TestCacheGlobalExpiration(t *testing.T) {
	t.Parallel()

	cache := NewCache()
	defer cache.Close()

	cache.SetTTL(time.Duration(100 * time.Millisecond))
	cache.Set("key_1", "value")
	cache.Set("key_2", "value")
	<-time.After(200 * time.Millisecond)
	assert.Equal(t, 0, cache.Count(), "Cache should be empty")

}

func TestCacheMixedExpirations(t *testing.T) {
	t.Parallel()

	cache := NewCache()
	defer cache.Close()

	cache.SetExpirationCallback(func(key string, value interface{}) {
		t.Logf("expired: %s", key)
	})
	cache.Set("key_1", "value")
	cache.SetTTL(time.Duration(100 * time.Millisecond))
	cache.Set("key_2", "value")
	<-time.After(150 * time.Millisecond)
	assert.Equal(t, 1, cache.Count(), "Cache should have only 1 item")
}

func TestCacheIndividualExpiration(t *testing.T) {
	t.Parallel()

	cache := NewCache()
	defer cache.Close()

	cache.SetWithTTL("key", "value", time.Duration(100*time.Millisecond))
	cache.SetWithTTL("key2", "value", time.Duration(100*time.Millisecond))
	cache.SetWithTTL("key3", "value", time.Duration(100*time.Millisecond))
	<-time.After(50 * time.Millisecond)
	assert.Equal(t, cache.Count(), 3, "Should have 3 elements in cache")
	<-time.After(160 * time.Millisecond)
	assert.Equal(t, cache.Count(), 0, "Cache should be empty")

	cache.SetWithTTL("key4", "value", time.Duration(50*time.Millisecond))
	<-time.After(100 * time.Millisecond)
	<-time.After(100 * time.Millisecond)
	assert.Equal(t, 0, cache.Count(), "Cache should be empty")
}

func TestCacheGet(t *testing.T) {
	t.Parallel()

	cache := NewCache()
	defer cache.Close()

	data, exists := cache.Get("hello")
	assert.Equal(t, exists, ErrNotFound, "Expected empty cache to return no data")
	assert.Nil(t, data, "Expected data to be empty")

	cache.Set("hello", "world")
	data, exists = cache.Get("hello")
	assert.NotNil(t, data, "Expected data to be not nil")
	assert.Equal(t, nil, exists, "Expected data to exist")
	assert.Equal(t, "world", (data.(string)), "Expected data content to be 'world'")
}

func TestCacheExpirationCallbackFunction(t *testing.T) {
	t.Parallel()

	expiredCount := 0
	var lock sync.Mutex

	cache := NewCache()
	defer cache.Close()

	cache.SetTTL(time.Duration(500 * time.Millisecond))
	cache.SetExpirationCallback(func(key string, value interface{}) {
		lock.Lock()
		defer lock.Unlock()
		expiredCount = expiredCount + 1
	})
	cache.SetWithTTL("key", "value", time.Duration(1000*time.Millisecond))
	cache.Set("key_2", "value")
	<-time.After(1100 * time.Millisecond)

	lock.Lock()
	defer lock.Unlock()
	assert.Equal(t, 2, expiredCount, "Expected 2 items to be expired")
}

// TestCacheCheckExpirationCallbackFunction should consider that the next entry in the queue
// needs to be considered for eviction even if the callback returns no eviction for the current item
func TestCacheCheckExpirationCallbackFunction(t *testing.T) {
	t.Parallel()

	expiredCount := 0
	var lock sync.Mutex

	cache := NewCache()
	defer cache.Close()

	cache.SkipTTLExtensionOnHit(true)
	cache.SetTTL(time.Duration(50 * time.Millisecond))
	cache.SetCheckExpirationCallback(func(key string, value interface{}) bool {
		if key == "key2" || key == "key4" {
			return true
		}
		return false
	})
	cache.SetExpirationCallback(func(key string, value interface{}) {
		lock.Lock()
		expiredCount = expiredCount + 1
		lock.Unlock()
	})
	cache.Set("key", "value")
	cache.Set("key3", "value")
	cache.Set("key2", "value")
	cache.Set("key4", "value")

	<-time.After(110 * time.Millisecond)
	lock.Lock()
	assert.Equal(t, 2, expiredCount, "Expected 2 items to be expired")
	lock.Unlock()
}

func TestCacheNewItemCallbackFunction(t *testing.T) {
	t.Parallel()

	newItemCount := 0
	cache := NewCache()
	defer cache.Close()

	cache.SetTTL(time.Duration(50 * time.Millisecond))
	cache.SetNewItemCallback(func(key string, value interface{}) {
		newItemCount = newItemCount + 1
	})
	cache.Set("key", "value")
	cache.Set("key2", "value")
	cache.Set("key", "value")
	<-time.After(110 * time.Millisecond)
	assert.Equal(t, 2, newItemCount, "Expected only 2 new items")
}

func TestCacheRemove(t *testing.T) {
	t.Parallel()

	cache := NewCache()
	defer cache.Close()

	cache.SetTTL(time.Duration(50 * time.Millisecond))
	cache.SetWithTTL("key", "value", time.Duration(100*time.Millisecond))
	cache.Set("key_2", "value")
	<-time.After(70 * time.Millisecond)
	removeKey := cache.Remove("key")
	removeKey2 := cache.Remove("key_2")
	assert.Equal(t, nil, removeKey, "Expected 'key' to be removed from cache")
	assert.Equal(t, ErrNotFound, removeKey2, "Expected 'key_2' to already be expired from cache")
}

func TestCacheSetWithTTLExistItem(t *testing.T) {
	t.Parallel()

	cache := NewCache()
	defer cache.Close()

	cache.SetTTL(time.Duration(100 * time.Millisecond))
	cache.SetWithTTL("key", "value", time.Duration(50*time.Millisecond))
	<-time.After(30 * time.Millisecond)
	cache.SetWithTTL("key", "value2", time.Duration(50*time.Millisecond))
	data, exists := cache.Get("key")
	assert.Equal(t, nil, exists, "Expected 'key' to exist")
	assert.Equal(t, "value2", data.(string), "Expected 'data' to have value 'value2'")
}

func TestCache_Purge(t *testing.T) {
	t.Parallel()

	cache := NewCache()
	defer cache.Close()

	cache.SetTTL(time.Duration(100 * time.Millisecond))

	for i := 0; i < 5; i++ {

		cache.SetWithTTL("key", "value", time.Duration(50*time.Millisecond))
		<-time.After(30 * time.Millisecond)
		cache.SetWithTTL("key", "value2", time.Duration(50*time.Millisecond))
		cache.Get("key")

		cache.Purge()
		assert.Equal(t, 0, cache.Count(), "Cache should be empty")
	}

}