github.com/hasnat/dolt/go@v0.0.0-20210628190320-9eb5d843fbb7/store/nbs/byte_sink_test.go (about)

     1  // Copyright 2019 Dolthub, 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  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package nbs
    16  
    17  import (
    18  	"bytes"
    19  	"io/ioutil"
    20  	"os"
    21  	"path/filepath"
    22  	"testing"
    23  
    24  	"github.com/google/uuid"
    25  	"github.com/stretchr/testify/assert"
    26  	"github.com/stretchr/testify/require"
    27  	"github.com/stretchr/testify/suite"
    28  )
    29  
    30  func TestBlockBufferTableSink(t *testing.T) {
    31  	createSink := func() ByteSink {
    32  		return NewBlockBufferTableSink(128)
    33  	}
    34  
    35  	suite.Run(t, &TableSinkSuite{createSink, t})
    36  }
    37  
    38  func TestFixedBufferTableSink(t *testing.T) {
    39  	createSink := func() ByteSink {
    40  		return NewFixedBufferTableSink(make([]byte, 32*1024))
    41  	}
    42  
    43  	suite.Run(t, &TableSinkSuite{createSink, t})
    44  }
    45  
    46  func TestBufferedFileByteSink(t *testing.T) {
    47  	createSink := func() ByteSink {
    48  		sink, err := NewBufferedFileByteSink("", 4*1024, 16)
    49  		require.NoError(t, err)
    50  
    51  		return sink
    52  	}
    53  
    54  	suite.Run(t, &TableSinkSuite{createSink, t})
    55  }
    56  
    57  type TableSinkSuite struct {
    58  	sinkFactory func() ByteSink
    59  	t           *testing.T
    60  }
    61  
    62  func (suite *TableSinkSuite) SetT(t *testing.T) {
    63  	suite.t = t
    64  }
    65  
    66  func (suite *TableSinkSuite) T() *testing.T {
    67  	return suite.t
    68  }
    69  
    70  func writeToSink(sink ByteSink) error {
    71  	data := make([]byte, 64)
    72  	for i := 0; i < 64; i++ {
    73  		data[i] = byte(i)
    74  	}
    75  
    76  	for i := 0; i < 32; i++ {
    77  		_, err := sink.Write(data)
    78  
    79  		if err != nil {
    80  			return err
    81  		}
    82  	}
    83  
    84  	return nil
    85  }
    86  
    87  func verifyContents(t *testing.T, bytes []byte) {
    88  	for i := 0; i < 64*32; i++ {
    89  		assert.Equal(t, byte(i%64), bytes[i])
    90  	}
    91  }
    92  
    93  func (suite *TableSinkSuite) TestWriteAndFlush() {
    94  	sink := suite.sinkFactory()
    95  	err := writeToSink(sink)
    96  	require.NoError(suite.t, err)
    97  
    98  	bb := bytes.NewBuffer(nil)
    99  	err = sink.Flush(bb)
   100  	require.NoError(suite.t, err)
   101  
   102  	verifyContents(suite.t, bb.Bytes())
   103  }
   104  
   105  func (suite *TableSinkSuite) TestWriteAndFlushToFile() {
   106  	sink := suite.sinkFactory()
   107  	err := writeToSink(sink)
   108  	require.NoError(suite.t, err)
   109  
   110  	path := filepath.Join(os.TempDir(), uuid.New().String())
   111  	err = sink.FlushToFile(path)
   112  	require.NoError(suite.t, err)
   113  
   114  	data, err := ioutil.ReadFile(path)
   115  	require.NoError(suite.t, err)
   116  
   117  	verifyContents(suite.t, data)
   118  }