github.com/klaytn/klaytn@v1.10.2/datasync/chaindatafetcher/kafka/checkpoint_db_test.go (about)

     1  // Copyright 2020 The klaytn Authors
     2  // This file is part of the klaytn library.
     3  //
     4  // The klaytn library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The klaytn library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the klaytn library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package kafka
    18  
    19  import (
    20  	"math/rand"
    21  	"testing"
    22  	"time"
    23  
    24  	"github.com/klaytn/klaytn/storage/database"
    25  	"github.com/stretchr/testify/assert"
    26  )
    27  
    28  func TestCheckpointDB_ReadCheckpoint(t *testing.T) {
    29  	rand.Seed(time.Now().UnixNano())
    30  	testDB := database.NewMemoryDBManager()
    31  	db := NewCheckpointDB()
    32  	db.SetComponent(testDB)
    33  
    34  	// 1. nothing is stored
    35  	checkpoint, err := db.ReadCheckpoint()
    36  	assert.NoError(t, err)
    37  	assert.Equal(t, int64(0), checkpoint)
    38  
    39  	// 2. store a checkpoint
    40  	expected := rand.Int63()
    41  	assert.NoError(t, db.WriteCheckpoint(expected))
    42  
    43  	// 3. assert the expected
    44  	actual, err := db.ReadCheckpoint()
    45  	assert.NoError(t, err)
    46  	assert.Equal(t, expected, actual)
    47  
    48  	// 4. overwrite checkpoint
    49  	expected2 := rand.Int63()
    50  	assert.NoError(t, db.WriteCheckpoint(expected2))
    51  
    52  	// 5. assert the expected 2
    53  	actual2, err := db.ReadCheckpoint()
    54  	assert.NoError(t, err)
    55  	assert.Equal(t, expected2, actual2)
    56  }