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

     1  // Copyright (c) 2021  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 index
    22  
    23  import (
    24  	"testing"
    25  
    26  	"github.com/m3db/m3/src/m3ninx/doc"
    27  	"github.com/m3db/m3/src/m3ninx/index/segment/fst/encoding"
    28  	"github.com/m3db/m3/src/m3ninx/postings"
    29  	xtest "github.com/m3db/m3/src/x/test"
    30  
    31  	"github.com/golang/mock/gomock"
    32  	"github.com/stretchr/testify/require"
    33  )
    34  
    35  func TestDocIterator(t *testing.T) {
    36  	mockCtrl := xtest.NewController(t)
    37  	defer mockCtrl.Finish()
    38  
    39  	docs := []doc.Metadata{
    40  		{
    41  			ID: []byte("doc-id-1"),
    42  			Fields: []doc.Field{
    43  				{
    44  					Name:  []byte("apple"),
    45  					Value: []byte("red"),
    46  				},
    47  			},
    48  		},
    49  		{
    50  			ID: []byte("doc-id-2"),
    51  			Fields: []doc.Field{
    52  				{
    53  					Name:  []byte("banana"),
    54  					Value: []byte("yellow"),
    55  				},
    56  			},
    57  		},
    58  	}
    59  
    60  	encodedDocsWithIds := make([]docsWithIDs, 0, len(docs))
    61  	for i, d := range docs {
    62  		encodedDocsWithIds = append(encodedDocsWithIds, docsWithIDs{
    63  			id: postings.ID(i),
    64  			doc: doc.NewDocumentFromEncoded(
    65  				doc.Encoded{Bytes: docToBytes(d)}),
    66  		})
    67  	}
    68  
    69  	retriever := NewMockDocRetriever(mockCtrl)
    70  	gomock.InOrder(
    71  		retriever.EXPECT().Doc(encodedDocsWithIds[0].id).Return(encodedDocsWithIds[0].doc, nil),
    72  		retriever.EXPECT().Doc(encodedDocsWithIds[1].id).Return(encodedDocsWithIds[1].doc, nil),
    73  	)
    74  
    75  	postingsIter := postings.NewMockIterator(mockCtrl)
    76  	gomock.InOrder(
    77  		postingsIter.EXPECT().Next().Return(true),
    78  		postingsIter.EXPECT().Current().Return(encodedDocsWithIds[0].id),
    79  		postingsIter.EXPECT().Next().Return(true),
    80  		postingsIter.EXPECT().Current().Return(encodedDocsWithIds[1].id),
    81  		postingsIter.EXPECT().Next().Return(false),
    82  		postingsIter.EXPECT().Close().Return(nil),
    83  	)
    84  
    85  	it := NewIterator(retriever, postingsIter)
    86  
    87  	require.True(t, it.Next())
    88  	require.Equal(t, encodedDocsWithIds[0].doc, it.Current())
    89  	require.True(t, it.Next())
    90  	require.Equal(t, encodedDocsWithIds[1].doc, it.Current())
    91  	require.False(t, it.Next())
    92  	require.NoError(t, it.Err())
    93  
    94  	require.NoError(t, it.Close())
    95  }
    96  
    97  type docsWithIDs struct {
    98  	id  postings.ID
    99  	doc doc.Document
   100  }
   101  
   102  func docToBytes(d doc.Metadata) []byte {
   103  	enc := encoding.NewEncoder(1024)
   104  	n := enc.PutBytes(d.ID)
   105  	n += enc.PutUvarint(uint64(len(d.Fields)))
   106  	for _, f := range d.Fields { // nolint:gocritic
   107  		n += enc.PutBytes(f.Name)
   108  		n += enc.PutBytes(f.Value)
   109  	}
   110  
   111  	return enc.Bytes()
   112  }