github.com/m3db/m3@v1.5.0/src/m3ninx/search/searcher/negation_test.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 searcher
    22  
    23  import (
    24  	"testing"
    25  
    26  	"github.com/m3db/m3/src/m3ninx/index"
    27  	"github.com/m3db/m3/src/m3ninx/postings"
    28  	"github.com/m3db/m3/src/m3ninx/postings/roaring"
    29  	"github.com/m3db/m3/src/m3ninx/search"
    30  
    31  	"github.com/golang/mock/gomock"
    32  	"github.com/stretchr/testify/require"
    33  )
    34  
    35  func TestNegationSearcher(t *testing.T) {
    36  	mockCtrl := gomock.NewController(t)
    37  	defer mockCtrl.Finish()
    38  
    39  	// First reader.
    40  	readerFirstPL := roaring.NewPostingsList()
    41  	require.NoError(t, readerFirstPL.AddRange(postings.ID(42), postings.ID(48)))
    42  	firstReader := index.NewMockReader(mockCtrl)
    43  
    44  	// Second reader.
    45  	readerSecondPL := roaring.NewPostingsList()
    46  	require.NoError(t, readerSecondPL.AddRange(postings.ID(48), postings.ID(52)))
    47  	secondReader := index.NewMockReader(mockCtrl)
    48  
    49  	// Mock searcher.
    50  	searcherFirstPL := roaring.NewPostingsList()
    51  	require.NoError(t, searcherFirstPL.Insert(postings.ID(42)))
    52  	require.NoError(t, searcherFirstPL.Insert(postings.ID(44)))
    53  	require.NoError(t, searcherFirstPL.Insert(postings.ID(45)))
    54  	searcherSecondPL := roaring.NewPostingsList()
    55  	require.NoError(t, searcherSecondPL.Insert(postings.ID(51)))
    56  	require.NoError(t, searcherSecondPL.Insert(postings.ID(52)))
    57  	searcher := search.NewMockSearcher(mockCtrl)
    58  
    59  	gomock.InOrder(
    60  		firstReader.EXPECT().MatchAll().Return(readerFirstPL, nil),
    61  		searcher.EXPECT().Search(firstReader).Return(searcherFirstPL, nil),
    62  		secondReader.EXPECT().MatchAll().Return(readerSecondPL, nil),
    63  		searcher.EXPECT().Search(secondReader).Return(searcherSecondPL, nil),
    64  	)
    65  
    66  	s, err := NewNegationSearcher(searcher)
    67  	require.NoError(t, err)
    68  
    69  	// Test the postings list from the first Reader.
    70  	var expected postings.List = readerFirstPL
    71  	expected, err = expected.Difference(searcherFirstPL)
    72  	require.NoError(t, err)
    73  
    74  	pl, err := s.Search(firstReader)
    75  	require.NoError(t, err)
    76  	require.True(t, pl.Equal(expected))
    77  
    78  	// Test the postings list from the second Reader.
    79  	expected = readerSecondPL
    80  	expected, err = expected.Difference(searcherSecondPL)
    81  	require.NoError(t, err)
    82  
    83  	pl, err = s.Search(secondReader)
    84  	require.NoError(t, err)
    85  	require.True(t, pl.Equal(expected))
    86  }