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regexp_cache_test.go
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regexp_cache_test.go
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package authr
import (
"regexp"
"runtime"
"testing"
)
func BenchmarkListCacheAddSerial(b *testing.B) {
c := newRegexpListCache(5)
b.ReportAllocs()
var _r *regexp.Regexp
for i := 0; i < b.N; i++ {
c.add("a", _r)
}
}
func BenchmarkListCacheAddParallel(b *testing.B) {
c := newRegexpListCache(5)
var _r *regexp.Regexp
b.SetParallelism(runtime.NumCPU())
b.ReportAllocs()
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
c.add("a", _r)
}
})
}
func BenchmarkListCacheFindMissParallel(b *testing.B) {
c := newRegexpListCache(5)
var _r *regexp.Regexp
c.add("a", _r)
c.add("b", _r)
c.add("c", _r)
c.add("d", _r)
c.add("e", _r)
b.SetParallelism(runtime.NumCPU())
b.ReportAllocs()
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
c.find("f")
}
})
}
func BenchmarkListCacheFindMissSerial(b *testing.B) {
c := newRegexpListCache(5)
var _r *regexp.Regexp
c.add("a", _r)
c.add("b", _r)
c.add("c", _r)
c.add("d", _r)
c.add("e", _r)
b.ReportAllocs()
for i := 0; i < b.N; i++ {
c.find("f")
}
}
func BenchmarkListCacheFindHitStartParallel(b *testing.B) {
c := newRegexpListCache(5)
var _r *regexp.Regexp
c.add("a", _r)
c.add("b", _r)
b.SetParallelism(runtime.NumCPU())
b.ReportAllocs()
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
c.find("b")
}
})
}
func BenchmarkListCacheFindHitStartSerial(b *testing.B) {
c := newRegexpListCache(5)
var _r *regexp.Regexp
c.add("a", _r)
c.add("b", _r)
b.ReportAllocs()
for i := 0; i < b.N; i++ {
c.find("b")
}
}
func BenchmarkListCacheFindHitEndParallel(b *testing.B) {
c := newRegexpListCache(5)
var _r *regexp.Regexp
c.add("a", _r)
c.add("b", _r)
c.add("c", _r)
c.add("d", _r)
c.add("e", _r)
b.SetParallelism(runtime.NumCPU())
b.ReportAllocs()
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
c.find("e")
}
})
}
func BenchmarkListCacheFindHitEndSerial(b *testing.B) {
c := newRegexpListCache(5)
var _r *regexp.Regexp
c.add("a", _r)
c.add("b", _r)
c.add("c", _r)
c.add("d", _r)
c.add("e", _r)
b.ReportAllocs()
for i := 0; i < b.N; i++ {
c.find("e")
}
}
func TestListCache(t *testing.T) {
t.Parallel()
t.Run("should store and be able to find", func(t *testing.T) {
c := newRegexpListCache(5)
var _r *regexp.Regexp
c.add("ozncowoldu", _r)
r, ok := c.find("ozncowoldu")
if !ok {
t.Fatalf("unexpected cache miss")
return
}
if r != _r {
t.Fatalf("cache returned the wrong pattern? %p != %p", _r, r)
return
}
})
t.Run("should miss if not able to find pattern", func(t *testing.T) {
c := newRegexpListCache(5)
r, ok := c.find("sckvccisjm")
if ok {
t.Fatalf("unexpected cache hit")
return
}
if r != nil {
t.Fatalf("unexpected *regexp.Regexp returned: %+v", r)
return
}
})
t.Run("should start overflowing and removing stuff", func(t *testing.T) {
c := newRegexpListCache(5)
var _r *regexp.Regexp = ®exp.Regexp{}
c.add("mjepcahoxe", _r)
c.add("qpafzozhjf", _r)
c.add("wbdporssdz", _r)
// fetch 'mjepcahoxe', this should move to the front
rr, ok := c.find("mjepcahoxe")
if !ok {
t.Fatalf("unexpected cache miss for 'mjepcahoxe'")
return
}
if rr == nil {
t.Fatalf("unexpected nil *regexp.Regexp for 'mjepcahoxe'")
return
}
c.add("znzqyktuuw", _r)
c.add("isuteoxatj", _r)
c.add("pkzbgrkdff", _r)
c.add("wncwhcpjsh", _r)
})
}