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// Copyright 2016-2018 The NATS Authors
// 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 nuid
import (
"bytes"
"testing"
)
func TestDigits(t *testing.T) {
if len(digits) != base {
t.Fatalf("digits length does not match base modulo")
}
}
func TestGlobalNUIDInit(t *testing.T) {
if globalNUID == nil {
t.Fatalf("Expected g to be non-nil\n")
}
if globalNUID.pre == nil || len(globalNUID.pre) != preLen {
t.Fatalf("Expected prefix to be initialized\n")
}
if globalNUID.seq == 0 {
t.Fatalf("Expected seq to be non-zero\n")
}
}
func TestNUIDRollover(t *testing.T) {
globalNUID.seq = maxSeq
// copy
oldPre := append([]byte{}, globalNUID.pre...)
Next()
if bytes.Equal(globalNUID.pre, oldPre) {
t.Fatalf("Expected new pre, got the old one\n")
}
}
func TestGUIDLen(t *testing.T) {
nuid := Next()
if len(nuid) != totalLen {
t.Fatalf("Expected len of %d, got %d\n", totalLen, len(nuid))
}
}
func TestProperPrefix(t *testing.T) {
min := byte(255)
max := byte(0)
for i := 0; i < len(digits); i++ {
if digits[i] < min {
min = digits[i]
}
if digits[i] > max {
max = digits[i]
}
}
total := 100000
for i := 0; i < total; i++ {
n := New()
for j := 0; j < preLen; j++ {
if n.pre[j] < min || n.pre[j] > max {
t.Fatalf("Iter %d. Valid range for bytes prefix: [%d..%d]\nIncorrect prefix at pos %d: %v (%s)",
i, min, max, j, n.pre, string(n.pre))
}
}
}
}
func BenchmarkNUIDSpeed(b *testing.B) {
n := New()
b.ReportAllocs()
for i := 0; i < b.N; i++ {
n.Next()
}
}
func BenchmarkGlobalNUIDSpeed(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
Next()
}
}
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