Remove dependecy to testify

[janisz]

Fixes: #189

[janisz]

@cristaloleg I removed sink. Why did we needed this?
BTW: In this test there are no assertion. Is this right?

[cristaloleg]

sink was made to ensure that compiler will not remove operation as no-op.

[janisz]

How about deleteing this test? I think it duplicates TestCacheDelRandomly

bigcache/bigcache_test.go

Lines 438 to 498 in ad8f119

	// TestCacheDelRandomly does simultaneous deletes, puts and gets, to check for corruption errors.
	func TestCacheDelRandomly(t *testing.T) {
	t.Parallel()
	c := Config{
	Shards: 1,
	LifeWindow: time.Second,
	CleanWindow: 0,
	MaxEntriesInWindow: 10,
	MaxEntrySize: 10,
	Verbose: false,
	Hasher: newDefaultHasher(),
	HardMaxCacheSize: 1,
	Logger: DefaultLogger(),
	}
	cache, _ := NewBigCache(c)
	var wg sync.WaitGroup
	var ntest = 800000
	wg.Add(1)
	go func() {
	for i := 0; i < ntest; i++ {
	r := uint8(rand.Int())
	key := fmt.Sprintf("thekey%d", r)
	cache.Delete(key)
	}
	wg.Done()
	}()
	wg.Add(1)
	go func() {
	val := make([]byte, 1024)
	for i := 0; i < ntest; i++ {
	r := byte(rand.Int())
	key := fmt.Sprintf("thekey%d", r)
	for j := 0; j < len(val); j++ {
	val[j] = r
	}
	cache.Set(key, val)
	}
	wg.Done()
	}()
	wg.Add(1)
	go func() {
	val := make([]byte, 1024)
	for i := 0; i < ntest; i++ {
	r := byte(rand.Int())
	key := fmt.Sprintf("thekey%d", r)
	for j := 0; j < len(val); j++ {
	val[j] = r
	}
	if got, err := cache.Get(key); err == nil && !bytes.Equal(got, val) {
	t.Errorf("got %s ->\n %x\n expected:\n %x\n ", key, got, val)
	}
	}
	wg.Done()
	}()
	wg.Wait()
	}

[siennathesane]

LGTM, just needs some addressing on @cristaloleg's feedback.

[janisz]

@cristaloleg Can you review?