github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/dm/pkg/log/ctx_test.go (about)

     1  // Copyright 2022 PingCAP, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package log
    15  
    16  import (
    17  	"context"
    18  	"fmt"
    19  	"testing"
    20  
    21  	"github.com/stretchr/testify/require"
    22  	"go.uber.org/zap"
    23  )
    24  
    25  func TestLogCtxBasics(t *testing.T) {
    26  	ctx := context.Background()
    27  	ctx1 := AppendZapFieldToCtx(ctx, zap.String("key1", "value1"))
    28  	ctx2 := AppendZapFieldToCtx(ctx1, zap.String("key2", "value2"))
    29  
    30  	require.Nil(t, getZapFieldsFromCtx(ctx))
    31  	require.Equal(t, []zap.Field{zap.String("key1", "value1")}, getZapFieldsFromCtx(ctx1))
    32  	require.Equal(t, []zap.Field{
    33  		zap.String("key1", "value1"),
    34  		zap.String("key2", "value2"),
    35  	}, getZapFieldsFromCtx(ctx2))
    36  }
    37  
    38  func TestLogCtxTooManyFields(t *testing.T) {
    39  	ctx := context.Background()
    40  	var (
    41  		ctxs   []context.Context
    42  		fields [][]zap.Field
    43  	)
    44  
    45  	ctxs = append(ctxs, ctx)
    46  	fields = append(fields, nil)
    47  	for i := 1; i < 100; i++ {
    48  		k := fmt.Sprintf("key%d", i)
    49  		v := fmt.Sprintf("value%d", i)
    50  		ctxs = append(ctxs, AppendZapFieldToCtx(ctxs[i-1], zap.String(k, v)))
    51  		fields = append(fields, append(fields[i-1], zap.String(k, v)))
    52  	}
    53  
    54  	for i := 0; i < 100; i++ {
    55  		require.Equal(t, fields[i], getZapFieldsFromCtx(ctxs[i]), "failed, index = %d", i)
    56  	}
    57  }