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stream_test.go
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/
stream_test.go
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package splitblockbloom
import (
"bytes"
"math"
"testing"
)
func TestBlockFromStreamAndContainsFromStream(t *testing.T) {
// Create a filter and add a hash
fpp := 0.01
bvp := RecommendedBitsPerValue(1000, fpp)
filter := NewFilter(1000, uint64(math.Ceil(bvp)))
hash := uint64(123456)
filter.AddHash(hash)
// Serialize the filter to a buffer
buf := new(bytes.Buffer)
_, err := filter.WriteTo(buf)
if err != nil {
t.Fatalf("Failed to write filter to buffer: %v", err)
}
// Test blockFromStream
blockCount := len(filter)
block, err := blockFromStream(bytes.NewReader(buf.Bytes()), blockCount, 0)
if err != nil {
t.Errorf("blockFromStream failed: %v", err)
}
if block == nil {
t.Error("blockFromStream returned a nil block")
}
// Test ContainsFromStream
exists, err := ContainsFromStream(bytes.NewReader(buf.Bytes()), blockCount, hash)
if err != nil {
t.Errorf("ContainsFromStream failed: %v", err)
}
if !exists {
t.Error("ContainsFromStream should have found the hash")
}
// Test with a hash that was not added
randomHash := uint64(654321)
exists, err = ContainsFromStream(bytes.NewReader(buf.Bytes()), blockCount, randomHash)
if err != nil {
t.Errorf("ContainsFromStream failed: %v", err)
}
if exists {
t.Error("ContainsFromStream falsely found a hash that was not added")
}
}