milvus/internal/util/trace/util_test.go

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// Copyright (C) 2019-2020 Zilliz. 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 trace
import (
"context"
"errors"
"fmt"
"os"
"testing"
"github.com/opentracing/opentracing-go"
oplog "github.com/opentracing/opentracing-go/log"
"github.com/stretchr/testify/assert"
)
type simpleStruct struct {
name string
value string
}
func TestMain(m *testing.M) {
closer := InitTracing("test")
defer closer.Close()
os.Exit(m.Run())
}
func TestInit(t *testing.T) {
cfg := initFromEnv("test")
assert.NotNil(t, cfg)
}
func TestTracing(t *testing.T) {
// context normally can be propagated through func params
ctx := context.Background()
//start span
//default use function name for operation name
sp, ctx := StartSpanFromContext(ctx)
id, sampled, found := InfoFromContext(ctx)
fmt.Printf("traceID = %s, sampled = %t, found = %t", id, sampled, found)
sp.SetTag("tag1", "tag1")
// use self-defined operation name for span
// sp, ctx := StartSpanFromContextWithOperationName(ctx, "self-defined name")
defer sp.Finish()
ss := &simpleStruct{
name: "name",
value: "value",
}
sp.LogFields(oplog.String("key", "value"), oplog.Object("key", ss))
err := caller(ctx)
if err != nil {
LogError(sp, err) //LogError do something error log in trace and returns origin error.
}
}
func caller(ctx context.Context) error {
for i := 0; i < 2; i++ {
// if span starts in a loop, defer is not allowed.
// manually call span.Finish() if error occurs or one loop ends
sp, _ := StartSpanFromContextWithOperationName(ctx, fmt.Sprintf("test:%d", i))
sp.SetTag(fmt.Sprintf("tags:%d", i), fmt.Sprintf("tags:%d", i))
var err error
if i == 1 {
err = errors.New("test")
}
if err != nil {
LogError(sp, err)
sp.Finish()
return nil
}
sp.Finish()
}
return nil
}
func TestInject(t *testing.T) {
// context normally can be propagated through func params
ctx := context.Background()
//start span
//default use function name for operation name
sp, ctx := StartSpanFromContext(ctx)
id, sampled, found := InfoFromContext(ctx)
fmt.Printf("traceID = %s, sampled = %t, found = %t", id, sampled, found)
pp := PropertiesReaderWriter{PpMap: map[string]string{}}
InjectContextToPulsarMsgProperties(sp.Context(), pp.PpMap)
tracer := opentracing.GlobalTracer()
sc, _ := tracer.Extract(opentracing.TextMap, pp)
assert.NotNil(t, sc)
}
func TestTraceError(t *testing.T) {
// context normally can be propagated through func params
sp, ctx := StartSpanFromContext(nil)
assert.Nil(t, ctx)
assert.NotNil(t, sp)
sp, ctx = StartSpanFromContextWithOperationName(nil, "test")
assert.Nil(t, ctx)
assert.NotNil(t, sp)
//Will Cause span log error
StartSpanFromContextWithOperationNameWithSkip(context.Background(), "test", 10000)
//Will Cause span log error
StartSpanFromContextWithSkip(context.Background(), 10000)
id, sampled, found := InfoFromSpan(nil)
assert.Equal(t, id, "")
assert.Equal(t, sampled, false)
assert.Equal(t, found, false)
id, sampled, found = InfoFromContext(nil)
assert.Equal(t, id, "")
assert.Equal(t, sampled, false)
assert.Equal(t, found, false)
}