github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/cdc/entry/codec_test.go (about)

     1  // Copyright 2020 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 entry
    15  
    16  import (
    17  	"encoding/hex"
    18  	"testing"
    19  
    20  	"github.com/stretchr/testify/require"
    21  )
    22  
    23  func TestDecodeTableID(t *testing.T) {
    24  	/*
    25  		"7480000000000000685f728000000000000001"
    26  		└─## decode hex key
    27  		  └─"t\200\000\000\000\000\000\000h_r\200\000\000\000\000\000\000\001"
    28  		    ├─## table prefix
    29  		    │ └─table: 104
    30  		    └─## table row key
    31  		      ├─table: 104
    32  		      └─row: 1
    33  	*/
    34  	key := "7480000000000000685f728000000000000001"
    35  	keyBytes, err := hex.DecodeString(key)
    36  	require.NoError(t, err)
    37  	tableID, err := DecodeTableID(keyBytes)
    38  	require.NoError(t, err)
    39  	require.Equal(t, tableID, int64(104))
    40  }