| // Licensed to Apache Software Foundation (ASF) under one or more contributor |
| // license agreements. See the NOTICE file distributed with |
| // this work for additional information regarding copyright |
| // ownership. Apache Software Foundation (ASF) licenses this file to you 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 core |
| |
| import ( |
| "sync" |
| "testing" |
| ) |
| |
| var samplerOperationName = "op" |
| |
| func TestConstSampler_IsSampled(t *testing.T) { |
| sampler := NewConstSampler(true) |
| sampled := sampler.IsSampled(samplerOperationName) |
| if sampled != true { |
| t.Errorf("const sampler should be sampled") |
| } |
| samplerNegative := NewConstSampler(false) |
| sampledNegative := samplerNegative.IsSampled(samplerOperationName) |
| if sampledNegative != false { |
| t.Errorf("const sampler should not be sampled") |
| } |
| } |
| |
| func TestRandomSampler_IsSampled(t *testing.T) { |
| randomSampler := NewRandomSampler(0.5) |
| |
| t.Run("threshold need transform", func(t *testing.T) { |
| if randomSampler.threshold != 50 { |
| t.Errorf("threshold should be 50") |
| } |
| }) |
| |
| // just for test case |
| randomSampler.threshold = 100 |
| sampled := randomSampler.IsSampled(samplerOperationName) |
| if sampled != true { |
| t.Errorf("random sampler should be sampled") |
| } |
| |
| randomSampler.threshold = 0 |
| sampled = randomSampler.IsSampled(samplerOperationName) |
| if sampled != false { |
| t.Errorf("random sampler should not be sampled") |
| } |
| } |
| |
| func TestNewRandomSampler(t *testing.T) { |
| randomSampler := NewRandomSampler(100) |
| sampled := randomSampler.IsSampled(samplerOperationName) |
| if sampled != true { |
| t.Errorf("random sampler should be sampled") |
| } |
| } |
| |
| func TestRandomSampler_getRandomizer(t *testing.T) { |
| t.Run("must not nil", func(t *testing.T) { |
| sampler := &RandomSampler{ |
| pool: sync.Pool{}, |
| } |
| |
| if sampler.getRandomizer() == nil { |
| t.Errorf("randomizer should be nil") |
| } |
| }) |
| |
| t.Run("must not nil, if got not a *rand.Rand", func(t *testing.T) { |
| sampler := &RandomSampler{ |
| pool: sync.Pool{}, |
| } |
| |
| sampler.pool.Put(&struct{}{}) |
| if sampler.getRandomizer() == nil { |
| t.Errorf("randomizer should be nil") |
| } |
| }) |
| } |
| |
| func BenchmarkRandomPoolSampler_IsSampled(b *testing.B) { |
| sampler := NewRandomSampler(0.5) |
| b.RunParallel(func(pb *testing.PB) { |
| for pb.Next() { |
| sampler.IsSampled(samplerOperationName) |
| } |
| }) |
| } |