1// Copyright 2016-2018 The NATS Authors 2// Licensed under the Apache License, Version 2.0 (the "License"); 3// you may not use this file except in compliance with the License. 4// You may obtain a copy of the License at 5// 6// http://www.apache.org/licenses/LICENSE-2.0 7// 8// Unless required by applicable law or agreed to in writing, software 9// distributed under the License is distributed on an "AS IS" BASIS, 10// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 11// See the License for the specific language governing permissions and 12// limitations under the License. 13 14package nuid 15 16import ( 17 "bytes" 18 "testing" 19) 20 21func TestDigits(t *testing.T) { 22 if len(digits) != base { 23 t.Fatalf("digits length does not match base modulo") 24 } 25} 26 27func TestGlobalNUIDInit(t *testing.T) { 28 if globalNUID == nil { 29 t.Fatalf("Expected g to be non-nil\n") 30 } 31 if globalNUID.pre == nil || len(globalNUID.pre) != preLen { 32 t.Fatalf("Expected prefix to be initialized\n") 33 } 34 if globalNUID.seq == 0 { 35 t.Fatalf("Expected seq to be non-zero\n") 36 } 37} 38 39func TestNUIDRollover(t *testing.T) { 40 globalNUID.seq = maxSeq 41 // copy 42 oldPre := append([]byte{}, globalNUID.pre...) 43 Next() 44 if bytes.Equal(globalNUID.pre, oldPre) { 45 t.Fatalf("Expected new pre, got the old one\n") 46 } 47} 48 49func TestGUIDLen(t *testing.T) { 50 nuid := Next() 51 if len(nuid) != totalLen { 52 t.Fatalf("Expected len of %d, got %d\n", totalLen, len(nuid)) 53 } 54} 55 56func TestProperPrefix(t *testing.T) { 57 min := byte(255) 58 max := byte(0) 59 for i := 0; i < len(digits); i++ { 60 if digits[i] < min { 61 min = digits[i] 62 } 63 if digits[i] > max { 64 max = digits[i] 65 } 66 } 67 total := 100000 68 for i := 0; i < total; i++ { 69 n := New() 70 for j := 0; j < preLen; j++ { 71 if n.pre[j] < min || n.pre[j] > max { 72 t.Fatalf("Iter %d. Valid range for bytes prefix: [%d..%d]\nIncorrect prefix at pos %d: %v (%s)", 73 i, min, max, j, n.pre, string(n.pre)) 74 } 75 } 76 } 77} 78 79func BenchmarkNUIDSpeed(b *testing.B) { 80 n := New() 81 b.ReportAllocs() 82 for i := 0; i < b.N; i++ { 83 n.Next() 84 } 85} 86 87func BenchmarkGlobalNUIDSpeed(b *testing.B) { 88 b.ReportAllocs() 89 for i := 0; i < b.N; i++ { 90 Next() 91 } 92} 93