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package http
import (
"fmt"
"net"
"testing"
)
func TestCacheCapacity(t *testing.T) {
var tests = []struct {
addCount, capacity, size int
evictions uint64
}{
{1, 0, 0, 0},
{1, 2, 1, 0},
{2, 2, 2, 0},
{3, 2, 2, 1},
{10, 5, 5, 5},
}
for i, tt := range tests {
c := NewCache(tt.capacity)
var responses []Response
for i := 0; i < tt.addCount; i++ {
ip := net.ParseIP(fmt.Sprintf("192.0.2.%d", i))
r := Response{IP: ip}
responses = append(responses, r)
c.Set(ip, r)
}
if got := len(c.entries); got != tt.size {
t.Errorf("#%d: len(entries) = %d, want %d", i, got, tt.size)
}
if got := c.evictions; got != tt.evictions {
t.Errorf("#%d: evictions = %d, want %d", i, got, tt.evictions)
}
if tt.capacity > 0 && tt.addCount > tt.capacity && tt.capacity == tt.size {
lastAdded := responses[tt.addCount-1]
if _, ok := c.Get(lastAdded.IP); !ok {
t.Errorf("#%d: Get(%s) = (_, %t), want (_, %t)", i, lastAdded.IP.String(), ok, !ok)
}
firstAdded := responses[0]
if _, ok := c.Get(firstAdded.IP); ok {
t.Errorf("#%d: Get(%s) = (_, %t), want (_, %t)", i, firstAdded.IP.String(), ok, !ok)
}
}
}
}
func TestCacheDuplicate(t *testing.T) {
c := NewCache(10)
ip := net.ParseIP("192.0.2.1")
response := Response{IP: ip}
c.Set(ip, response)
c.Set(ip, response)
want := 1
if got := len(c.entries); got != want {
t.Errorf("want %d entries, got %d", want, got)
}
if got := c.values.Len(); got != want {
t.Errorf("want %d values, got %d", want, got)
}
}
func TestCacheResize(t *testing.T) {
c := NewCache(10)
for i := 1; i <= 20; i++ {
ip := net.ParseIP(fmt.Sprintf("192.0.2.%d", i))
r := Response{IP: ip}
c.Set(ip, r)
}
if got, want := len(c.entries), 10; got != want {
t.Errorf("want %d entries, got %d", want, got)
}
if got, want := c.evictions, uint64(10); got != want {
t.Errorf("want %d evictions, got %d", want, got)
}
if err := c.Resize(5); err != nil {
t.Fatal(err)
}
if got, want := c.evictions, uint64(0); got != want {
t.Errorf("want %d evictions, got %d", want, got)
}
r := Response{IP: net.ParseIP("192.0.2.42")}
c.Set(r.IP, r)
if got, want := len(c.entries), 5; got != want {
t.Errorf("want %d entries, got %d", want, got)
}
}
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