248 lines
6.7 KiB
Go
248 lines
6.7 KiB
Go
// Copyright (c) 2016-2017 The btcsuite developers
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// Copyright (c) 2016-2017 The Lightning Network Developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package gcs_test
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import (
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"bytes"
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"encoding/binary"
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"math/rand"
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"testing"
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"github.com/btcsuite/btcutil/gcs"
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)
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var (
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// No need to allocate an err variable in every test
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err error
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// Collision probability for the tests (1/2**20)
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P = uint8(20)
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// Filters are conserved between tests but we must define with an
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// interface which functions we're testing because the gcsFilter type
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// isn't exported
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filter, filter2, filter3, filter4, filter5 *gcs.Filter
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// We need to use the same key for building and querying the filters
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key [gcs.KeySize]byte
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// List of values for building a filter
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contents = [][]byte{
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[]byte("Alex"),
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[]byte("Bob"),
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[]byte("Charlie"),
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[]byte("Dick"),
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[]byte("Ed"),
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[]byte("Frank"),
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[]byte("George"),
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[]byte("Harry"),
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[]byte("Ilya"),
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[]byte("John"),
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[]byte("Kevin"),
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[]byte("Larry"),
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[]byte("Michael"),
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[]byte("Nate"),
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[]byte("Owen"),
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[]byte("Paul"),
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[]byte("Quentin"),
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}
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// List of values for querying a filter using MatchAny()
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contents2 = [][]byte{
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[]byte("Alice"),
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[]byte("Betty"),
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[]byte("Charmaine"),
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[]byte("Donna"),
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[]byte("Edith"),
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[]byte("Faina"),
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[]byte("Georgia"),
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[]byte("Hannah"),
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[]byte("Ilsbeth"),
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[]byte("Jennifer"),
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[]byte("Kayla"),
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[]byte("Lena"),
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[]byte("Michelle"),
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[]byte("Natalie"),
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[]byte("Ophelia"),
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[]byte("Peggy"),
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[]byte("Queenie"),
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}
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)
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// TestGCSFilterBuild builds a test filter with a randomized key. For Bitcoin
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// use, deterministic filter generation is desired. Therefore, a key that's
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// derived deterministically would be required.
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func TestGCSFilterBuild(t *testing.T) {
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for i := 0; i < gcs.KeySize; i += 4 {
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binary.BigEndian.PutUint32(key[i:], rand.Uint32())
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}
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filter, err = gcs.BuildGCSFilter(P, key, contents)
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if err != nil {
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t.Fatalf("Filter build failed: %s", err.Error())
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}
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}
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// TestGCSFilterCopy deserializes and serializes a filter to create a copy.
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func TestGCSFilterCopy(t *testing.T) {
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filter2, err = gcs.FromBytes(filter.N(), P, filter.Bytes())
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if err != nil {
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t.Fatalf("Filter copy failed: %s", err.Error())
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}
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filter3, err = gcs.FromNBytes(filter.P(), filter.NBytes())
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if err != nil {
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t.Fatalf("Filter copy failed: %s", err.Error())
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}
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filter4, err = gcs.FromPBytes(filter.N(), filter.PBytes())
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if err != nil {
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t.Fatalf("Filter copy failed: %s", err.Error())
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}
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filter5, err = gcs.FromNPBytes(filter.NPBytes())
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if err != nil {
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t.Fatalf("Filter copy failed: %s", err.Error())
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}
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}
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// TestGCSFilterMetadata checks that the filter metadata is built and copied
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// correctly.
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func TestGCSFilterMetadata(t *testing.T) {
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if filter.P() != P {
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t.Fatal("P not correctly stored in filter metadata")
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}
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if filter.N() != uint32(len(contents)) {
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t.Fatal("N not correctly stored in filter metadata")
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}
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if filter.P() != filter2.P() {
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t.Fatal("P doesn't match between copied filters")
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}
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if filter.P() != filter3.P() {
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t.Fatal("P doesn't match between copied filters")
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}
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if filter.P() != filter4.P() {
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t.Fatal("P doesn't match between copied filters")
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}
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if filter.P() != filter5.P() {
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t.Fatal("P doesn't match between copied filters")
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}
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if filter.N() != filter2.N() {
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t.Fatal("N doesn't match between copied filters")
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}
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if filter.N() != filter3.N() {
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t.Fatal("N doesn't match between copied filters")
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}
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if filter.N() != filter4.N() {
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t.Fatal("N doesn't match between copied filters")
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}
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if filter.N() != filter5.N() {
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t.Fatal("N doesn't match between copied filters")
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}
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if !bytes.Equal(filter.Bytes(), filter2.Bytes()) {
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t.Fatal("Bytes don't match between copied filters")
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}
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if !bytes.Equal(filter.Bytes(), filter3.Bytes()) {
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t.Fatal("Bytes don't match between copied filters")
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}
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if !bytes.Equal(filter.Bytes(), filter4.Bytes()) {
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t.Fatal("Bytes don't match between copied filters")
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}
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if !bytes.Equal(filter.Bytes(), filter5.Bytes()) {
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t.Fatal("Bytes don't match between copied filters")
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}
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}
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// TestGCSFilterMatch checks that both the built and copied filters match
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// correctly, logging any false positives without failing on them.
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func TestGCSFilterMatch(t *testing.T) {
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match, err := filter.Match(key, []byte("Nate"))
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if err != nil {
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t.Fatalf("Filter match failed: %s", err.Error())
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}
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if !match {
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t.Fatal("Filter didn't match when it should have!")
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}
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match, err = filter2.Match(key, []byte("Nate"))
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if err != nil {
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t.Fatalf("Filter match failed: %s", err.Error())
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}
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if !match {
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t.Fatal("Filter didn't match when it should have!")
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}
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match, err = filter.Match(key, []byte("Quentin"))
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if err != nil {
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t.Fatalf("Filter match failed: %s", err.Error())
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}
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if !match {
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t.Fatal("Filter didn't match when it should have!")
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}
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match, err = filter2.Match(key, []byte("Quentin"))
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if err != nil {
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t.Fatalf("Filter match failed: %s", err.Error())
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}
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if !match {
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t.Fatal("Filter didn't match when it should have!")
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}
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match, err = filter.Match(key, []byte("Nates"))
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if err != nil {
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t.Fatalf("Filter match failed: %s", err.Error())
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}
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if match {
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t.Logf("False positive match, should be 1 in 2**%d!", P)
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}
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match, err = filter2.Match(key, []byte("Nates"))
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if err != nil {
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t.Fatalf("Filter match failed: %s", err.Error())
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}
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if match {
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t.Logf("False positive match, should be 1 in 2**%d!", P)
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}
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match, err = filter.Match(key, []byte("Quentins"))
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if err != nil {
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t.Fatalf("Filter match failed: %s", err.Error())
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}
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if match {
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t.Logf("False positive match, should be 1 in 2**%d!", P)
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}
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match, err = filter2.Match(key, []byte("Quentins"))
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if err != nil {
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t.Fatalf("Filter match failed: %s", err.Error())
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}
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if match {
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t.Logf("False positive match, should be 1 in 2**%d!", P)
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}
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}
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// TestGCSFilterMatchAny checks that both the built and copied filters match a
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// list correctly, logging any false positives without failing on them.
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func TestGCSFilterMatchAny(t *testing.T) {
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match, err := filter.MatchAny(key, contents2)
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if err != nil {
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t.Fatalf("Filter match any failed: %s", err.Error())
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}
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if match {
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t.Logf("False positive match, should be 1 in 2**%d!", P)
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}
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match, err = filter2.MatchAny(key, contents2)
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if err != nil {
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t.Fatalf("Filter match any failed: %s", err.Error())
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}
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if match {
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t.Logf("False positive match, should be 1 in 2**%d!", P)
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}
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contents2 = append(contents2, []byte("Nate"))
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match, err = filter.MatchAny(key, contents2)
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if err != nil {
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t.Fatalf("Filter match any failed: %s", err.Error())
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}
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if !match {
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t.Fatal("Filter didn't match any when it should have!")
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}
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match, err = filter2.MatchAny(key, contents2)
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if err != nil {
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t.Fatalf("Filter match any failed: %s", err.Error())
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}
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if !match {
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t.Fatal("Filter didn't match any when it should have!")
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}
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}
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