github.com/m3db/m3@v1.5.0/src/m3ninx/index/segment/fst/utils.go (about)

     1  // Copyright (c) 2018 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package fst
    22  
    23  import (
    24  	"bytes"
    25  	"testing"
    26  
    27  	sgmt "github.com/m3db/m3/src/m3ninx/index/segment"
    28  	"github.com/m3db/m3/src/x/mmap"
    29  
    30  	"github.com/stretchr/testify/require"
    31  )
    32  
    33  // ToTestSegment returns a FST segment equivalent to the provide mutable segment.
    34  func ToTestSegment(t *testing.T, s sgmt.MutableSegment, opts Options) sgmt.Segment {
    35  	return newFSTSegment(t, s, opts)
    36  }
    37  
    38  func newFSTSegmentWithVersion(
    39  	t *testing.T,
    40  	s sgmt.MutableSegment,
    41  	opts Options,
    42  	writerVersion, readerVersion Version,
    43  ) sgmt.Segment {
    44  	s.Seal()
    45  	w, err := newWriterWithVersion(WriterOptions{}, &writerVersion)
    46  	require.NoError(t, err)
    47  	require.NoError(t, w.Reset(s))
    48  
    49  	var (
    50  		docsDataBuffer  bytes.Buffer
    51  		docsIndexBuffer bytes.Buffer
    52  		postingsBuffer  bytes.Buffer
    53  		fstTermsBuffer  bytes.Buffer
    54  		fstFieldsBuffer bytes.Buffer
    55  	)
    56  
    57  	require.NoError(t, w.WriteDocumentsData(&docsDataBuffer))
    58  	require.NoError(t, w.WriteDocumentsIndex(&docsIndexBuffer))
    59  	require.NoError(t, w.WritePostingsOffsets(&postingsBuffer))
    60  	require.NoError(t, w.WriteFSTTerms(&fstTermsBuffer))
    61  	require.NoError(t, w.WriteFSTFields(&fstFieldsBuffer))
    62  
    63  	data := SegmentData{
    64  		Version:       readerVersion,
    65  		Metadata:      w.Metadata(),
    66  		DocsData:      mmap.Descriptor{Bytes: docsDataBuffer.Bytes()},
    67  		DocsIdxData:   mmap.Descriptor{Bytes: docsIndexBuffer.Bytes()},
    68  		PostingsData:  mmap.Descriptor{Bytes: postingsBuffer.Bytes()},
    69  		FSTTermsData:  mmap.Descriptor{Bytes: fstTermsBuffer.Bytes()},
    70  		FSTFieldsData: mmap.Descriptor{Bytes: fstFieldsBuffer.Bytes()},
    71  	}
    72  	reader, err := NewSegment(data, opts)
    73  	require.NoError(t, err)
    74  
    75  	return reader
    76  }
    77  
    78  func newFSTSegment(t *testing.T, s sgmt.MutableSegment, opts Options) sgmt.Segment {
    79  	return newFSTSegmentWithVersion(t, s, opts, CurrentVersion, CurrentVersion)
    80  }