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levenshtein_test.go
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levenshtein_test.go
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package disfun
/*
RUN BENCHMARKS: go test -bench=.
*/
import (
"testing"
)
var s1 = "supercalibro"
var s2 = "suprcalbro"
var s3 = "levenshtein"
var s4 = "hamming"
var s5 = "jfkldhfjdkhsayruiewfjiodnmcopjdiohvidhnsuvjhdioshvbudsjkl;ieiryewfbcklsjmcmdkvhewioufsauifgbeuncoejkwgfoijewjfdklajfkheklwhfkhdjskhfjkldshfjdsajfkldhsfk"
var s6 = "fkdhsavhdjslfikjfdkshfjjdslkjfdsjfkldshfewijinewfnioenvd.hsavhnjdnvkdjsvjndvndksnvkdsjfovdsjfopwqjfihgjhnvioewhfkjdskfhdjsjflds;jfljdkshfidlsaofjdksfiods"
func BenchmarkLevenshteinDistance(b *testing.B) {
for n := 0; n < b.N; n++ {
l0 := NewLevenshtein(s5, s6)
//l1 := NewLevenshtein(s3, s4)
l0.Similarity()
//l1.Similarity()
}
}
func BenchmarkLevenDistance(b *testing.B) {
for n := 0; n < b.N; n++ {
l0 := NewLeven(s5, s6)
//l1 := NewLeven(s3, s4)
l0.Similarity()
//l1.Similarity()
}
}
func BenchmarkLevDistance(b *testing.B) {
for n := 0; n < b.N; n++ {
Lev(s5, s6)
//Lev(s3, s4)
}
}
func BenchmarkLevEditDistance(b *testing.B) {
for n := 0; n < b.N; n++ {
LevEditDistance(s5, s6)
//Lev(s3, s4)
}
}
func TestLevenshteinDistanceTwo(t *testing.T) {
l := NewLevenshtein(s1, s2)
distance := l.Similarity()
expected := 2.0
if distance != expected {
t.Log("Expected: ", expected, "but got ", distance)
t.Fail()
}
}
func TestLevenshteinDistanceMucho(t *testing.T) {
l := NewLevenshtein(s3, s4)
distance := l.Similarity()
expected := 10.0
if distance != expected {
t.Log("Expected: ", expected, "but got ", distance)
t.Fail()
}
}
func TestLevenDistanceTwo(t *testing.T) {
l1 := NewLeven(s1, s2)
distance := l1.Similarity()
expected := 2.0
if distance != expected {
t.Log("Expected: ", expected, "but got ", distance)
t.Fail()
}
}
func TestLevenDistanceMucho(t *testing.T) {
l1 := NewLeven(s3, s4)
distance := l1.Similarity()
expected := 9.0
if distance != expected {
t.Log("Expected: ", expected, "but got ", distance)
t.Fail()
}
}
func TestLevDistanceTwo(t *testing.T) {
distance := Lev(s1, s2)
expected := 2
if distance != expected {
t.Log("Expected: ", expected, "but got ", distance)
t.Fail()
}
}
func TestLevDistanceMucho(t *testing.T) {
distance := Lev(s3, s4)
expected := 9
if distance != expected {
t.Log("Expected: ", expected, "but got ", distance)
t.Fail()
}
}
var levtests = []struct {
s1 string
s2 string
dist int
}{
// insertion
{"car", "cars", 1},
// substitution
{"library", "librari", 1},
// deletion
{"library", "librar", 1},
// one empty, left
{"", "library", 7},
// one empty, right
{"library", "", 7},
// two empties
{"", "", 0},
// unicode stuff!
{"Schüßler", "Schübler", 1},
{"Schüßler", "Schußler", 1},
{"Schüßler", "Schüßler", 0},
{"Schüßler", "Schüler", 1},
{"Schüßler", "Schüßlers", 1},
}
// Regular Levenshtein
func TestLevEditDistance(t *testing.T) {
for _, tt := range levtests {
dist := LevEditDistance(tt.s1, tt.s2)
if dist != tt.dist {
t.Errorf("Levenshtein('%s', '%s') = %v, want %v", tt.s1, tt.s2, dist, tt.dist)
}
}
}