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simhasher_test.go
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simhasher_test.go
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package gosimhash
import (
"testing"
"github.com/HaoyuHu/gosimhash/utils"
)
func TestSimhashWithJenkins(t *testing.T) {
hasher := NewSimpleSimhasher()
defer hasher.Free()
var sentence = "我来到北京清华大学"
var topN = 5
func() {
var expected uint64
var actual uint64
expected = 0xfa596a42bb35f945
actual = hasher.MakeSimhash(&sentence, topN)
if expected != actual {
t.Error(expected, "!=", actual)
}
}()
func() {
var expected string
var actual string
expected = "1111101001011001011010100100001010111011001101011111100101000101"
actual = hasher.MakeSimhashBinString(&sentence, topN)
if expected != actual {
t.Error(expected, "!=", actual)
}
}()
func() {
var first uint64
var second uint64
first = hasher.MakeSimhash(&sentence, topN)
second = hasher.MakeSimhash(&sentence, topN)
if first != second {
t.Error(first, "!=", second)
}
}()
func() {
distance := CalculateDistanceBySimhash(0x812e5cf1b47eb66, 0x812e5cf1b47eb61)
if distance != 3 {
t.Error(distance, "!= 3")
}
}()
func() {
distance, err := CalculateDistanceBySimhashBinString(
"100000010010111001011100111100011011010001111110101101100110",
"100000010010111001011100111100011011010001111110101101100001")
if err != nil {
t.Error(err.Error())
return
}
if distance != 3 {
t.Error(distance, "!= 3")
}
}()
}
func TestSimhashWithSipHash(t *testing.T) {
sip := utils.NewSipHasher([]byte(DefaultHashKey))
hasher := NewSimhasher(sip, "./dict/jieba.dict.utf8", "./dict/hmm_model.utf8", "",
"./dict/idf.utf8", "./dict/stop_words.utf8")
defer hasher.Free()
var sentence = "我来到北京清华大学"
var topN = 5
func() {
var expected uint64
var actual uint64
expected = 0x812e5cf1b47eb66
actual = hasher.MakeSimhash(&sentence, topN)
if expected != actual {
t.Error(expected, "!=", actual)
}
}()
func() {
var expected string
var actual string
expected = "100000010010111001011100111100011011010001111110101101100110"
actual = hasher.MakeSimhashBinString(&sentence, topN)
if expected != actual {
t.Error(expected, "!=", actual)
}
}()
func() {
var first uint64
var second uint64
first = hasher.MakeSimhash(&sentence, topN)
second = hasher.MakeSimhash(&sentence, topN)
if first != second {
t.Error(first, "!=", second)
}
}()
func() {
distance := CalculateDistanceBySimhash(0x812e5cf1b47eb66, 0x812e5cf1b47eb61)
if distance != 3 {
t.Error(distance, "!= 3")
}
}()
func() {
distance, err := CalculateDistanceBySimhashBinString(
"100000010010111001011100111100011011010001111110101101100110",
"100000010010111001011100111100011011010001111110101101100001")
if err != nil {
t.Error(err.Error())
return
} else if distance != 3 {
t.Error(distance, "!= 3")
}
distance, err = CalculateDistanceBySimhashBinString(
"100000010010111001011100111100011011010001111110101101100113",
"100000010010111001011100111100011011010001111110101101100001")
if err == nil {
t.Error("Should throw error at CalculateDistanceBySimhashBinString")
}
distance, err = CalculateDistanceBySimhashBinString(
"100000010010111001011100111100011011010001111110101101100110",
"100000010010111001011100111100011011010001111110101101100003")
if err == nil {
t.Error("Should throw error at CalculateDistanceBySimhashBinString")
}
}()
func() {
duplicated := IsSimhashDuplicated(0x812e5cf1b47eb66, 0x812e5cf1b47eb61, 3)
if !duplicated {
t.Error("Should be duplicated at IsSimhashDuplicated")
}
duplicated, err := IsSimhashBinStringDuplicated(
"100000010010111001011100111100011011010001111110101101100110",
"100000010010111001011100111100011011010001111110101101100001", 3)
if err != nil {
t.Error(err.Error())
} else if !duplicated {
t.Error("Should be duplicated at IsSimhashBinStringDuplicated")
}
duplicated, err = IsSimhashBinStringDuplicated(
"100000010010111001011100111100011011010001111110101101100113",
"100000010010111001011100111100011011010001111110101101100001", 3)
if err == nil {
t.Error("Should throw error at IsSimhashBinStringDuplicated")
}
duplicated, err = IsSimhashBinStringDuplicated(
"100000010010111001011100111100011011010001111110101101100110",
"100000010010111001011100111100011011010001111110101101100003", 3)
if err == nil {
t.Error("Should throw error at IsSimhashBinStringDuplicated")
}
}()
}