gods/lists/singlylinkedlist/singlylinkedlist_test.go
2022-04-13 16:52:21 +02:00

692 lines
17 KiB
Go

// Copyright (c) 2015, Emir Pasic. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package singlylinkedlist
import (
"encoding/json"
"fmt"
"strings"
"testing"
"github.com/emirpasic/gods/utils"
)
func TestListNew(t *testing.T) {
list1 := New()
if actualValue := list1.Empty(); actualValue != true {
t.Errorf("Got %v expected %v", actualValue, true)
}
list2 := New(1, "b")
if actualValue := list2.Size(); actualValue != 2 {
t.Errorf("Got %v expected %v", actualValue, 2)
}
if actualValue, ok := list2.Get(0); actualValue != 1 || !ok {
t.Errorf("Got %v expected %v", actualValue, 1)
}
if actualValue, ok := list2.Get(1); actualValue != "b" || !ok {
t.Errorf("Got %v expected %v", actualValue, "b")
}
if actualValue, ok := list2.Get(2); actualValue != nil || ok {
t.Errorf("Got %v expected %v", actualValue, nil)
}
}
func TestListAdd(t *testing.T) {
list := New()
list.Add("a")
list.Add("b", "c")
if actualValue := list.Empty(); actualValue != false {
t.Errorf("Got %v expected %v", actualValue, false)
}
if actualValue := list.Size(); actualValue != 3 {
t.Errorf("Got %v expected %v", actualValue, 3)
}
if actualValue, ok := list.Get(2); actualValue != "c" || !ok {
t.Errorf("Got %v expected %v", actualValue, "c")
}
}
func TestListAppendAndPrepend(t *testing.T) {
list := New()
list.Add("b")
list.Prepend("a")
list.Append("c")
if actualValue := list.Empty(); actualValue != false {
t.Errorf("Got %v expected %v", actualValue, false)
}
if actualValue := list.Size(); actualValue != 3 {
t.Errorf("Got %v expected %v", actualValue, 3)
}
if actualValue, ok := list.Get(0); actualValue != "a" || !ok {
t.Errorf("Got %v expected %v", actualValue, "c")
}
if actualValue, ok := list.Get(1); actualValue != "b" || !ok {
t.Errorf("Got %v expected %v", actualValue, "c")
}
if actualValue, ok := list.Get(2); actualValue != "c" || !ok {
t.Errorf("Got %v expected %v", actualValue, "c")
}
}
func TestListRemove(t *testing.T) {
list := New()
list.Add("a")
list.Add("b", "c")
list.Remove(2)
if actualValue, ok := list.Get(2); actualValue != nil || ok {
t.Errorf("Got %v expected %v", actualValue, nil)
}
list.Remove(1)
list.Remove(0)
list.Remove(0) // no effect
if actualValue := list.Empty(); actualValue != true {
t.Errorf("Got %v expected %v", actualValue, true)
}
if actualValue := list.Size(); actualValue != 0 {
t.Errorf("Got %v expected %v", actualValue, 0)
}
}
func TestListGet(t *testing.T) {
list := New()
list.Add("a")
list.Add("b", "c")
if actualValue, ok := list.Get(0); actualValue != "a" || !ok {
t.Errorf("Got %v expected %v", actualValue, "a")
}
if actualValue, ok := list.Get(1); actualValue != "b" || !ok {
t.Errorf("Got %v expected %v", actualValue, "b")
}
if actualValue, ok := list.Get(2); actualValue != "c" || !ok {
t.Errorf("Got %v expected %v", actualValue, "c")
}
if actualValue, ok := list.Get(3); actualValue != nil || ok {
t.Errorf("Got %v expected %v", actualValue, nil)
}
list.Remove(0)
if actualValue, ok := list.Get(0); actualValue != "b" || !ok {
t.Errorf("Got %v expected %v", actualValue, "b")
}
}
func TestListSwap(t *testing.T) {
list := New()
list.Add("a")
list.Add("b", "c")
list.Swap(0, 1)
if actualValue, ok := list.Get(0); actualValue != "b" || !ok {
t.Errorf("Got %v expected %v", actualValue, "c")
}
}
func TestListSort(t *testing.T) {
list := New()
list.Sort(utils.StringComparator)
list.Add("e", "f", "g", "a", "b", "c", "d")
list.Sort(utils.StringComparator)
for i := 1; i < list.Size(); i++ {
a, _ := list.Get(i - 1)
b, _ := list.Get(i)
if a.(string) > b.(string) {
t.Errorf("Not sorted! %s > %s", a, b)
}
}
}
func TestListClear(t *testing.T) {
list := New()
list.Add("e", "f", "g", "a", "b", "c", "d")
list.Clear()
if actualValue := list.Empty(); actualValue != true {
t.Errorf("Got %v expected %v", actualValue, true)
}
if actualValue := list.Size(); actualValue != 0 {
t.Errorf("Got %v expected %v", actualValue, 0)
}
}
func TestListContains(t *testing.T) {
list := New()
list.Add("a")
list.Add("b", "c")
if actualValue := list.Contains("a"); actualValue != true {
t.Errorf("Got %v expected %v", actualValue, true)
}
if actualValue := list.Contains("a", "b", "c"); actualValue != true {
t.Errorf("Got %v expected %v", actualValue, true)
}
if actualValue := list.Contains("a", "b", "c", "d"); actualValue != false {
t.Errorf("Got %v expected %v", actualValue, false)
}
list.Clear()
if actualValue := list.Contains("a"); actualValue != false {
t.Errorf("Got %v expected %v", actualValue, false)
}
if actualValue := list.Contains("a", "b", "c"); actualValue != false {
t.Errorf("Got %v expected %v", actualValue, false)
}
}
func TestListValues(t *testing.T) {
list := New()
list.Add("a")
list.Add("b", "c")
if actualValue, expectedValue := fmt.Sprintf("%s%s%s", list.Values()...), "abc"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
}
func TestListIndexOf(t *testing.T) {
list := New()
expectedIndex := -1
if index := list.IndexOf("a"); index != expectedIndex {
t.Errorf("Got %v expected %v", index, expectedIndex)
}
list.Add("a")
list.Add("b", "c")
expectedIndex = 0
if index := list.IndexOf("a"); index != expectedIndex {
t.Errorf("Got %v expected %v", index, expectedIndex)
}
expectedIndex = 1
if index := list.IndexOf("b"); index != expectedIndex {
t.Errorf("Got %v expected %v", index, expectedIndex)
}
expectedIndex = 2
if index := list.IndexOf("c"); index != expectedIndex {
t.Errorf("Got %v expected %v", index, expectedIndex)
}
}
func TestListInsert(t *testing.T) {
list := New()
list.Insert(0, "b", "c")
list.Insert(0, "a")
list.Insert(10, "x") // ignore
if actualValue := list.Size(); actualValue != 3 {
t.Errorf("Got %v expected %v", actualValue, 3)
}
list.Insert(3, "d") // append
if actualValue := list.Size(); actualValue != 4 {
t.Errorf("Got %v expected %v", actualValue, 4)
}
if actualValue, expectedValue := fmt.Sprintf("%s%s%s%s", list.Values()...), "abcd"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
}
func TestListSet(t *testing.T) {
list := New()
list.Set(0, "a")
list.Set(1, "b")
if actualValue := list.Size(); actualValue != 2 {
t.Errorf("Got %v expected %v", actualValue, 2)
}
list.Set(2, "c") // append
if actualValue := list.Size(); actualValue != 3 {
t.Errorf("Got %v expected %v", actualValue, 3)
}
list.Set(4, "d") // ignore
list.Set(1, "bb") // update
if actualValue := list.Size(); actualValue != 3 {
t.Errorf("Got %v expected %v", actualValue, 3)
}
if actualValue, expectedValue := fmt.Sprintf("%s%s%s", list.Values()...), "abbc"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
}
func TestListEach(t *testing.T) {
list := New()
list.Add("a", "b", "c")
list.Each(func(index int, value interface{}) {
switch index {
case 0:
if actualValue, expectedValue := value, "a"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
case 1:
if actualValue, expectedValue := value, "b"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
case 2:
if actualValue, expectedValue := value, "c"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
default:
t.Errorf("Too many")
}
})
}
func TestListMap(t *testing.T) {
list := New()
list.Add("a", "b", "c")
mappedList := list.Map(func(index int, value interface{}) interface{} {
return "mapped: " + value.(string)
})
if actualValue, _ := mappedList.Get(0); actualValue != "mapped: a" {
t.Errorf("Got %v expected %v", actualValue, "mapped: a")
}
if actualValue, _ := mappedList.Get(1); actualValue != "mapped: b" {
t.Errorf("Got %v expected %v", actualValue, "mapped: b")
}
if actualValue, _ := mappedList.Get(2); actualValue != "mapped: c" {
t.Errorf("Got %v expected %v", actualValue, "mapped: c")
}
if mappedList.Size() != 3 {
t.Errorf("Got %v expected %v", mappedList.Size(), 3)
}
}
func TestListSelect(t *testing.T) {
list := New()
list.Add("a", "b", "c")
selectedList := list.Select(func(index int, value interface{}) bool {
return value.(string) >= "a" && value.(string) <= "b"
})
if actualValue, _ := selectedList.Get(0); actualValue != "a" {
t.Errorf("Got %v expected %v", actualValue, "value: a")
}
if actualValue, _ := selectedList.Get(1); actualValue != "b" {
t.Errorf("Got %v expected %v", actualValue, "value: b")
}
if selectedList.Size() != 2 {
t.Errorf("Got %v expected %v", selectedList.Size(), 3)
}
}
func TestListAny(t *testing.T) {
list := New()
list.Add("a", "b", "c")
any := list.Any(func(index int, value interface{}) bool {
return value.(string) == "c"
})
if any != true {
t.Errorf("Got %v expected %v", any, true)
}
any = list.Any(func(index int, value interface{}) bool {
return value.(string) == "x"
})
if any != false {
t.Errorf("Got %v expected %v", any, false)
}
}
func TestListAll(t *testing.T) {
list := New()
list.Add("a", "b", "c")
all := list.All(func(index int, value interface{}) bool {
return value.(string) >= "a" && value.(string) <= "c"
})
if all != true {
t.Errorf("Got %v expected %v", all, true)
}
all = list.All(func(index int, value interface{}) bool {
return value.(string) >= "a" && value.(string) <= "b"
})
if all != false {
t.Errorf("Got %v expected %v", all, false)
}
}
func TestListFind(t *testing.T) {
list := New()
list.Add("a", "b", "c")
foundIndex, foundValue := list.Find(func(index int, value interface{}) bool {
return value.(string) == "c"
})
if foundValue != "c" || foundIndex != 2 {
t.Errorf("Got %v at %v expected %v at %v", foundValue, foundIndex, "c", 2)
}
foundIndex, foundValue = list.Find(func(index int, value interface{}) bool {
return value.(string) == "x"
})
if foundValue != nil || foundIndex != -1 {
t.Errorf("Got %v at %v expected %v at %v", foundValue, foundIndex, nil, nil)
}
}
func TestListChaining(t *testing.T) {
list := New()
list.Add("a", "b", "c")
chainedList := list.Select(func(index int, value interface{}) bool {
return value.(string) > "a"
}).Map(func(index int, value interface{}) interface{} {
return value.(string) + value.(string)
})
if chainedList.Size() != 2 {
t.Errorf("Got %v expected %v", chainedList.Size(), 2)
}
if actualValue, ok := chainedList.Get(0); actualValue != "bb" || !ok {
t.Errorf("Got %v expected %v", actualValue, "b")
}
if actualValue, ok := chainedList.Get(1); actualValue != "cc" || !ok {
t.Errorf("Got %v expected %v", actualValue, "c")
}
}
func TestListIteratorNextOnEmpty(t *testing.T) {
list := New()
it := list.Iterator()
for it.Next() {
t.Errorf("Shouldn't iterate on empty list")
}
}
func TestListIteratorNext(t *testing.T) {
list := New()
list.Add("a", "b", "c")
it := list.Iterator()
count := 0
for it.Next() {
count++
index := it.Index()
value := it.Value()
switch index {
case 0:
if actualValue, expectedValue := value, "a"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
case 1:
if actualValue, expectedValue := value, "b"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
case 2:
if actualValue, expectedValue := value, "c"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
default:
t.Errorf("Too many")
}
}
if actualValue, expectedValue := count, 3; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
}
func TestListIteratorBegin(t *testing.T) {
list := New()
it := list.Iterator()
it.Begin()
list.Add("a", "b", "c")
for it.Next() {
}
it.Begin()
it.Next()
if index, value := it.Index(), it.Value(); index != 0 || value != "a" {
t.Errorf("Got %v,%v expected %v,%v", index, value, 0, "a")
}
}
func TestListIteratorFirst(t *testing.T) {
list := New()
it := list.Iterator()
if actualValue, expectedValue := it.First(), false; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
list.Add("a", "b", "c")
if actualValue, expectedValue := it.First(), true; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
if index, value := it.Index(), it.Value(); index != 0 || value != "a" {
t.Errorf("Got %v,%v expected %v,%v", index, value, 0, "a")
}
}
func TestListIteratorNextTo(t *testing.T) {
// Sample seek function, i.e. string starting with "b"
seek := func(index int, value interface{}) bool {
return strings.HasSuffix(value.(string), "b")
}
// NextTo (empty)
{
list := New()
it := list.Iterator()
for it.NextTo(seek) {
t.Errorf("Shouldn't iterate on empty list")
}
}
// NextTo (not found)
{
list := New()
list.Add("xx", "yy")
it := list.Iterator()
for it.NextTo(seek) {
t.Errorf("Shouldn't iterate on empty list")
}
}
// NextTo (found)
{
list := New()
list.Add("aa", "bb", "cc")
it := list.Iterator()
it.Begin()
if !it.NextTo(seek) {
t.Errorf("Shouldn't iterate on empty list")
}
if index, value := it.Index(), it.Value(); index != 1 || value.(string) != "bb" {
t.Errorf("Got %v,%v expected %v,%v", index, value, 1, "bb")
}
if !it.Next() {
t.Errorf("Should go to first element")
}
if index, value := it.Index(), it.Value(); index != 2 || value.(string) != "cc" {
t.Errorf("Got %v,%v expected %v,%v", index, value, 2, "cc")
}
if it.Next() {
t.Errorf("Should not go past last element")
}
}
}
func TestListSerialization(t *testing.T) {
list := New()
list.Add("a", "b", "c")
var err error
assert := func() {
if actualValue, expectedValue := fmt.Sprintf("%s%s%s", list.Values()...), "abc"; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
if actualValue, expectedValue := list.Size(), 3; actualValue != expectedValue {
t.Errorf("Got %v expected %v", actualValue, expectedValue)
}
if err != nil {
t.Errorf("Got error %v", err)
}
}
assert()
bytes, err := list.ToJSON()
assert()
err = list.FromJSON(bytes)
assert()
bytes, err = json.Marshal([]interface{}{"a", "b", "c", list})
if err != nil {
t.Errorf("Got error %v", err)
}
err = json.Unmarshal([]byte(`[1,2,3]`), &list)
if err != nil {
t.Errorf("Got error %v", err)
}
}
func TestListString(t *testing.T) {
c := New()
c.Add(1)
if !strings.HasPrefix(c.String(), "SinglyLinkedList") {
t.Errorf("String should start with container name")
}
}
func benchmarkGet(b *testing.B, list *List, size int) {
for i := 0; i < b.N; i++ {
for n := 0; n < size; n++ {
list.Get(n)
}
}
}
func benchmarkAdd(b *testing.B, list *List, size int) {
for i := 0; i < b.N; i++ {
for n := 0; n < size; n++ {
list.Add(n)
}
}
}
func benchmarkRemove(b *testing.B, list *List, size int) {
for i := 0; i < b.N; i++ {
for n := 0; n < size; n++ {
list.Remove(n)
}
}
}
func BenchmarkSinglyLinkedListGet100(b *testing.B) {
b.StopTimer()
size := 100
list := New()
for n := 0; n < size; n++ {
list.Add(n)
}
b.StartTimer()
benchmarkGet(b, list, size)
}
func BenchmarkSinglyLinkedListGet1000(b *testing.B) {
b.StopTimer()
size := 1000
list := New()
for n := 0; n < size; n++ {
list.Add(n)
}
b.StartTimer()
benchmarkGet(b, list, size)
}
func BenchmarkSinglyLinkedListGet10000(b *testing.B) {
b.StopTimer()
size := 10000
list := New()
for n := 0; n < size; n++ {
list.Add(n)
}
b.StartTimer()
benchmarkGet(b, list, size)
}
func BenchmarkSinglyLinkedListGet100000(b *testing.B) {
b.StopTimer()
size := 100000
list := New()
for n := 0; n < size; n++ {
list.Add(n)
}
b.StartTimer()
benchmarkGet(b, list, size)
}
func BenchmarkSinglyLinkedListAdd100(b *testing.B) {
b.StopTimer()
size := 100
list := New()
b.StartTimer()
benchmarkAdd(b, list, size)
}
func BenchmarkSinglyLinkedListAdd1000(b *testing.B) {
b.StopTimer()
size := 1000
list := New()
for n := 0; n < size; n++ {
list.Add(n)
}
b.StartTimer()
benchmarkAdd(b, list, size)
}
func BenchmarkSinglyLinkedListAdd10000(b *testing.B) {
b.StopTimer()
size := 10000
list := New()
for n := 0; n < size; n++ {
list.Add(n)
}
b.StartTimer()
benchmarkAdd(b, list, size)
}
func BenchmarkSinglyLinkedListAdd100000(b *testing.B) {
b.StopTimer()
size := 100000
list := New()
for n := 0; n < size; n++ {
list.Add(n)
}
b.StartTimer()
benchmarkAdd(b, list, size)
}
func BenchmarkSinglyLinkedListRemove100(b *testing.B) {
b.StopTimer()
size := 100
list := New()
for n := 0; n < size; n++ {
list.Add(n)
}
b.StartTimer()
benchmarkRemove(b, list, size)
}
func BenchmarkSinglyLinkedListRemove1000(b *testing.B) {
b.StopTimer()
size := 1000
list := New()
for n := 0; n < size; n++ {
list.Add(n)
}
b.StartTimer()
benchmarkRemove(b, list, size)
}
func BenchmarkSinglyLinkedListRemove10000(b *testing.B) {
b.StopTimer()
size := 10000
list := New()
for n := 0; n < size; n++ {
list.Add(n)
}
b.StartTimer()
benchmarkRemove(b, list, size)
}
func BenchmarkSinglyLinkedListRemove100000(b *testing.B) {
b.StopTimer()
size := 100000
list := New()
for n := 0; n < size; n++ {
list.Add(n)
}
b.StartTimer()
benchmarkRemove(b, list, size)
}