49 lines
964 B
Go
49 lines
964 B
Go
package cryptocore
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import (
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"bytes"
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"compress/flate"
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"runtime"
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"sync"
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"testing"
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)
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// TestRandPrefetch hammers the randPrefetcher with 100 goroutines and verifies
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// that the result is incompressible
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func TestRandPrefetch(t *testing.T) {
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runtime.GOMAXPROCS(10)
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p := 100
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l := 200
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vec := make([][]byte, p)
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var wg sync.WaitGroup
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for i := 0; i < p; i++ {
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wg.Add(1)
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go func(i int) {
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var tmp []byte
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for x := 0; x < l; x++ {
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tmp = append(tmp, randPrefetcher.read(l)...)
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}
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vec[i] = tmp
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wg.Done()
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}(i)
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}
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wg.Wait()
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var b bytes.Buffer
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fw, _ := flate.NewWriter(&b, flate.BestCompression)
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for _, v := range vec {
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fw.Write(v)
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}
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fw.Close()
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if b.Len() < p*l*l {
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t.Errorf("random data should be incompressible, but: in=%d compressed=%d\n", p*l*l, b.Len())
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}
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}
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func BenchmarkRandPrefetch(b *testing.B) {
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// 16-byte nonces are default since gocryptfs v0.7
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b.SetBytes(16)
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for i := 0; i < b.N; i++ {
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randPrefetcher.read(16)
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}
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}
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