github.com/m3db/m3@v1.5.0/src/m3ninx/search/searcher/conjunction_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 TestConjunctionSearcher(t *testing.T) {
    36  	mockCtrl := gomock.NewController(t)
    37  	defer mockCtrl.Finish()
    38  
    39  	firstReader := index.NewMockReader(mockCtrl)
    40  	secondReader := index.NewMockReader(mockCtrl)
    41  
    42  	// First searcher.
    43  	firstPL1 := roaring.NewPostingsList()
    44  	require.NoError(t, firstPL1.Insert(postings.ID(42)))
    45  	require.NoError(t, firstPL1.Insert(postings.ID(50)))
    46  	firstPL2 := roaring.NewPostingsList()
    47  	require.NoError(t, firstPL2.Insert(postings.ID(64)))
    48  	firstSearcher := search.NewMockSearcher(mockCtrl)
    49  
    50  	// Second searcher.
    51  	secondPL1 := roaring.NewPostingsList()
    52  	require.NoError(t, secondPL1.Insert(postings.ID(53)))
    53  	require.NoError(t, secondPL1.Insert(postings.ID(50)))
    54  	secondPL2 := roaring.NewPostingsList()
    55  	require.NoError(t, secondPL2.Insert(postings.ID(64)))
    56  	require.NoError(t, secondPL2.Insert(postings.ID(72)))
    57  	secondSearcher := search.NewMockSearcher(mockCtrl)
    58  
    59  	// Third searcher.
    60  	thirdPL1 := roaring.NewPostingsList()
    61  	require.NoError(t, thirdPL1.Insert(postings.ID(42)))
    62  	require.NoError(t, thirdPL1.Insert(postings.ID(53)))
    63  	thirdPL2 := roaring.NewPostingsList()
    64  	require.NoError(t, thirdPL2.Insert(postings.ID(64)))
    65  	require.NoError(t, thirdPL2.Insert(postings.ID(89)))
    66  	thirdSearcher := search.NewMockSearcher(mockCtrl)
    67  
    68  	gomock.InOrder(
    69  		// Get the postings lists for the first Reader.
    70  		firstSearcher.EXPECT().Search(firstReader).Return(firstPL1, nil),
    71  		secondSearcher.EXPECT().Search(firstReader).Return(secondPL1, nil),
    72  		thirdSearcher.EXPECT().Search(firstReader).Return(thirdPL1, nil),
    73  
    74  		// Get the postings lists for the second Reader.
    75  		firstSearcher.EXPECT().Search(secondReader).Return(firstPL2, nil),
    76  		secondSearcher.EXPECT().Search(secondReader).Return(secondPL2, nil),
    77  		thirdSearcher.EXPECT().Search(secondReader).Return(thirdPL2, nil),
    78  	)
    79  
    80  	var (
    81  		searchers = []search.Searcher{firstSearcher, secondSearcher}
    82  		negations = []search.Searcher{thirdSearcher}
    83  	)
    84  
    85  	s, err := NewConjunctionSearcher(searchers, negations)
    86  	require.NoError(t, err)
    87  
    88  	// Test the postings list from the first Reader.
    89  	var expected postings.List = firstPL1
    90  	expected, err = expected.Intersect(secondPL1)
    91  	require.NoError(t, err)
    92  	expected, err = expected.Difference(thirdPL1)
    93  	require.NoError(t, err)
    94  
    95  	pl, err := s.Search(firstReader)
    96  	require.NoError(t, err)
    97  	require.True(t, pl.Equal(expected))
    98  
    99  	// Test the postings list from the second Reader.
   100  	expected = firstPL2
   101  	expected, err = expected.Intersect(secondPL2)
   102  	require.NoError(t, err)
   103  	expected, err = expected.Difference(thirdPL2)
   104  	require.NoError(t, err)
   105  
   106  	pl, err = s.Search(secondReader)
   107  	require.NoError(t, err)
   108  	require.True(t, pl.Equal(expected))
   109  }
   110  
   111  func TestConjunctionSearcherError(t *testing.T) {
   112  	tests := []struct {
   113  		name      string
   114  		searchers search.Searchers
   115  		negations search.Searchers
   116  	}{
   117  		{
   118  			name: "empty list of searchers",
   119  		},
   120  	}
   121  
   122  	for _, test := range tests {
   123  		t.Run(test.name, func(t *testing.T) {
   124  			_, err := NewConjunctionSearcher(test.searchers, test.negations)
   125  			require.Error(t, err)
   126  		})
   127  	}
   128  }