5 func TestLRU(t *testing.T) {
7 onEvicted := func(k interface{}, v interface{}) {
9 t.Fatalf("Evict values not equal (%v!=%v)", k, v)
13 l, err := NewLRU(128, onEvicted)
15 t.Fatalf("err: %v", err)
18 for i := 0; i < 256; i++ {
22 t.Fatalf("bad len: %v", l.Len())
25 if evictCounter != 128 {
26 t.Fatalf("bad evict count: %v", evictCounter)
29 for i, k := range l.Keys() {
30 if v, ok := l.Get(k); !ok || v != k || v != i+128 {
31 t.Fatalf("bad key: %v", k)
34 for i := 0; i < 128; i++ {
37 t.Fatalf("should be evicted")
40 for i := 128; i < 256; i++ {
43 t.Fatalf("should not be evicted")
46 for i := 128; i < 192; i++ {
49 t.Fatalf("should be contained")
53 t.Fatalf("should not be contained")
57 t.Fatalf("should be deleted")
61 l.Get(192) // expect 192 to be last key in l.Keys()
63 for i, k := range l.Keys() {
64 if (i < 63 && k != i+193) || (i == 63 && k != 192) {
65 t.Fatalf("out of order key: %v", k)
71 t.Fatalf("bad len: %v", l.Len())
73 if _, ok := l.Get(200); ok {
74 t.Fatalf("should contain nothing")
78 func TestLRU_GetOldest_RemoveOldest(t *testing.T) {
79 l, err := NewLRU(128, nil)
81 t.Fatalf("err: %v", err)
83 for i := 0; i < 256; i++ {
86 k, _, ok := l.GetOldest()
91 t.Fatalf("bad: %v", k)
94 k, _, ok = l.RemoveOldest()
99 t.Fatalf("bad: %v", k)
102 k, _, ok = l.RemoveOldest()
107 t.Fatalf("bad: %v", k)
111 // Test that Add returns true/false if an eviction occurred
112 func TestLRU_Add(t *testing.T) {
114 onEvicted := func(k interface{}, v interface{}) {
118 l, err := NewLRU(1, onEvicted)
120 t.Fatalf("err: %v", err)
123 if l.Add(1, 1) == true || evictCounter != 0 {
124 t.Errorf("should not have an eviction")
126 if l.Add(2, 2) == false || evictCounter != 1 {
127 t.Errorf("should have an eviction")
131 // Test that Contains doesn't update recent-ness
132 func TestLRU_Contains(t *testing.T) {
133 l, err := NewLRU(2, nil)
135 t.Fatalf("err: %v", err)
141 t.Errorf("1 should be contained")
146 t.Errorf("Contains should not have updated recent-ness of 1")
150 // Test that Peek doesn't update recent-ness
151 func TestLRU_Peek(t *testing.T) {
152 l, err := NewLRU(2, nil)
154 t.Fatalf("err: %v", err)
159 if v, ok := l.Peek(1); !ok || v != 1 {
160 t.Errorf("1 should be set to 1: %v, %v", v, ok)
165 t.Errorf("should not have updated recent-ness of 1")