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// Copyright 2024 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package hash provides non-cryptographic hash functions for template use.
package hash
import (
"crypto/md5"
"encoding/hex"
"fmt"
"strings"
"testing"
qt "github.com/frankban/quicktest"
"github.com/spf13/cast"
)
func TestXxHash(t *testing.T) {
t.Parallel()
c := qt.New(t)
ns := New()
h, err := ns.XxHash("The quick brown fox jumps over the lazy dog")
c.Assert(err, qt.IsNil)
// Facit: https://asecuritysite.com/encryption/xxhash?val=The%20quick%20brown%20fox%20jumps%20over%20the%20lazy%20dog
c.Assert(h, qt.Equals, "0b242d361fda71bc")
}
func BenchmarkXxHash(b *testing.B) {
const inputSmall = "The quick brown fox jumps over the lazy dog"
inputLarge := strings.Repeat(inputSmall, 100)
runBench := func(name, input string, b *testing.B, fn func(v any)) {
b.Run(fmt.Sprintf("%s_%d", name, len(input)), func(b *testing.B) {
for i := 0; i < b.N; i++ {
fn(input)
}
})
}
ns := New()
fnXxHash := func(v any) {
_, err := ns.XxHash(v)
if err != nil {
panic(err)
}
}
fnFNv32a := func(v any) {
_, err := ns.FNV32a(v)
if err != nil {
panic(err)
}
}
// Copied from the crypto tpl/crypto package,
// just to have something to compare the above with.
fnMD5 := func(v any) {
conv, err := cast.ToStringE(v)
if err != nil {
panic(err)
}
hash := md5.Sum([]byte(conv))
_ = hex.EncodeToString(hash[:])
}
for _, input := range []string{inputSmall, inputLarge} {
runBench("xxHash", input, b, fnXxHash)
runBench("mdb5", input, b, fnMD5)
runBench("fnv32a", input, b, fnFNv32a)
}
}
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