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trie_test.go
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trie_test.go
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package trie
import (
"bufio"
"fmt"
"math/rand"
"os"
"strconv"
"testing"
)
func matches(big, small string) bool {
if len(small) > len(big) {
return false
}
length := len(small)
if small[len(small)-1] == byte('*') {
length--
}
for i := 0; i < length; i++ {
if big[i] != small[i] {
return false
}
}
return true
}
func getSubset(paths []string, length int) []string {
if length > len(paths) {
length = len(paths)
}
subset := make([]string, length)
usedIndex := make(map[int]int)
for i := 0; i < length; i++ {
var randIndex int
for {
randIndex = rand.Intn(length)
if _, exists := usedIndex[randIndex]; !exists {
usedIndex[randIndex] = 1
break
}
}
subset[i] = paths[randIndex]
}
return subset
}
func getFile(f string) []string {
strs := make([]string, 0)
file, err := os.Open(f)
if err != nil {
return strs
}
defer file.Close()
scanner := bufio.NewScanner(file)
for scanner.Scan() {
strs = append(strs, scanner.Text())
}
return strs
}
func TestTrie(test *testing.T) {
seed, err := strconv.Atoi(os.Getenv("SEED"))
if err != nil {
seed = 1988
}
rand.Seed(int64(seed))
set := getFile("./testset.txt")
subset := getSubset(set, 2000)
t := NewTrie()
for i := range subset {
t.Insert(subset[i])
}
if t.Exists("testsi") {
test.Fatal("'testsi' shouldn't exist")
}
if t.SubExists("ted") {
test.Fatal("'ted' shouldn't sub exist")
}
if t.Exists("hello") {
test.Fatal("'hello' shouldn't exist")
}
err = t.DeleteWords(50, '*')
if err != nil {
test.Fatal(err)
}
words := t.GetWords()
numberCoveredInSet := make([]int, len(words))
numberCoveredInSubset := make([]int, len(words))
setCount := 0
subsetCount := 0
for i := range words {
setCovered := 0
for j := range set {
if matches(set[j], words[i]) {
setCovered++
setCount++
}
}
subsetCovered := 0
for j := range subset {
if matches(subset[j], words[i]) {
subsetCovered++
subsetCount++
}
}
numberCoveredInSet[i] = setCovered
numberCoveredInSubset[i] = subsetCovered
}
nummatches := 0
for _, word := range set {
for _, subWord := range subset {
if matches(subWord, word) {
nummatches++
}
}
}
// fmt.Println("words : numberConveredInSubset : numberCoveredInSet")
// for i := range words {
// fmt.Printf("%s : %d : %d\n", words[i], numberCoveredInSubset[i], numberCoveredInSet[i])
// }
fmt.Println("Length of Subset:", len(subset), "Length of Set:", len(set))
fmt.Println("Covered in Subset:", subsetCount, "Covered in Set:", setCount)
if len(subset) != subsetCount {
test.Fatal("not all words covered")
}
}
func TestTrieSubMatchCase(test *testing.T) {
t := NewTrie()
if err := t.Insert("hello there"); err != nil {
test.Fatalf("expected to be able to insert. got error: %s", err.Error())
}
if err := t.Insert("hello ther"); err != nil {
test.Fatalf("expected to be able to insert. got error: %s", err.Error())
}
if !t.Exists("hello ther") {
test.Fatalf("expected '%s' to exist", "hell")
}
if err := t.Insert("hello the"); err != nil {
test.Fatalf("expected to be able to insert. got error: %s", err.Error())
}
if err := t.Insert("hello th"); err != nil {
test.Fatalf("expected to be able to insert. got error: %s", err.Error())
}
if err := t.Insert("hello t"); err != nil {
test.Fatalf("expected to be able to insert. got error: %s", err.Error())
}
if err := t.Insert("hello "); err != nil {
test.Fatalf("expected to be able to insert. got error: %s", err.Error())
}
if err := t.Insert("hello"); err != nil {
test.Fatalf("expected to be able to insert. got error: %s", err.Error())
}
if err := t.Insert("hell"); err != nil {
test.Fatalf("expected to be able to insert. got error: %s", err.Error())
}
if err := t.Insert(""); err != nil {
test.Fatalf("expected to be able to insert. got error: %s", err.Error())
}
}
func TestTrieValidate(test *testing.T) {
t := NewTrie()
if err := t.Insert("test"); err != nil {
test.Fatalf("expected to be able to insert. got error: %s", err.Error())
}
if err := t.Insert("testing"); err != nil {
test.Fatalf("expected to be able to insert. got error: %s", err.Error())
}
if err := t.Insert("testify"); err != nil {
test.Fatalf("expected to be able to insert. got error: %s", err.Error())
}
if err := t.Insert("testimony"); err != nil {
test.Fatalf("expected to be able to insert. got error: %s", err.Error())
}
if err := t.Insert("tes"); err != nil {
test.Fatalf("expected to be able to insert. got error: %s", err.Error())
}
if err := t.Insert("tess"); err != nil {
test.Fatalf("expected to be able to insert. got error: %s", err.Error())
}
if !t.Validate() {
test.Fatalf("expected trie to be valid")
}
}