mirror of https://github.com/knative/pkg.git
93 lines
2.1 KiB
Go
93 lines
2.1 KiB
Go
/*
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Copyright 2019 The Knative Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package tracing
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import (
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"crypto/rand"
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"testing"
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"go.opencensus.io/trace"
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"knative.dev/pkg/tracing/config"
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)
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func TestCreateOCTConfig(t *testing.T) {
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tcs := []struct {
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name string
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cfg config.Config
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expect trace.Config
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}{{
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name: "Default",
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cfg: config.Config{},
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expect: trace.Config{
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DefaultSampler: trace.NeverSample(),
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},
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}, {
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name: "Disabled",
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cfg: config.Config{
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Backend: config.None,
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},
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expect: trace.Config{
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DefaultSampler: trace.NeverSample(),
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},
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}, {
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name: "Debug",
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cfg: config.Config{
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Backend: config.Zipkin,
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Debug: true,
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},
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expect: trace.Config{
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DefaultSampler: trace.AlwaysSample(),
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},
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}, {
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name: "Debug disabled",
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cfg: config.Config{
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Backend: config.None,
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Debug: true,
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},
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expect: trace.Config{
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DefaultSampler: trace.NeverSample(),
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},
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}, {
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name: "percent sampler",
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cfg: config.Config{
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Backend: config.Zipkin,
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Debug: false,
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SampleRate: 0.5,
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},
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expect: trace.Config{
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DefaultSampler: trace.ProbabilitySampler(0.5),
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},
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}}
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for _, tc := range tcs {
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t.Run(tc.name, func(t *testing.T) {
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octCfg := createOCTConfig(&tc.cfg)
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// Create 100 traceIDs and make sure our expected sampler samples the same as what we get
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for range 100 {
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spanID := make([]byte, 8)
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rand.Read(spanID)
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param := trace.SamplingParameters{}
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copy(param.SpanID[:], spanID)
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if tc.expect.DefaultSampler(param).Sample != octCfg.DefaultSampler(param).Sample {
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t.Errorf("Sampler for config did not match expected sample value for trace.")
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}
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}
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})
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}
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}
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