github.com/m3db/m3@v1.5.0/src/m3ninx/index/segment/mem/iterator_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 mem
    22  
    23  import (
    24  	"testing"
    25  
    26  	"github.com/m3db/m3/src/m3ninx/postings"
    27  
    28  	"github.com/golang/mock/gomock"
    29  	"github.com/stretchr/testify/require"
    30  )
    31  
    32  func TestIterator(t *testing.T) {
    33  	mockCtrl := gomock.NewController(t)
    34  	defer mockCtrl.Finish()
    35  
    36  	ids := []postings.ID{
    37  		13, 27, 42, 65,
    38  	}
    39  	limit := ids[len(ids)-2]
    40  
    41  	postingsIter := postings.NewMockIterator(mockCtrl)
    42  	gomock.InOrder(
    43  		postingsIter.EXPECT().Next().Return(true),
    44  		postingsIter.EXPECT().Current().Return(ids[0]),
    45  		postingsIter.EXPECT().Next().Return(true),
    46  		postingsIter.EXPECT().Current().Return(ids[1]),
    47  		postingsIter.EXPECT().Next().Return(true),
    48  		postingsIter.EXPECT().Current().Return(ids[2]),
    49  		postingsIter.EXPECT().Next().Return(true),
    50  		postingsIter.EXPECT().Current().Return(ids[3]),
    51  		postingsIter.EXPECT().Next().Return(false),
    52  		postingsIter.EXPECT().Err().Return(nil),
    53  		postingsIter.EXPECT().Close().Return(nil),
    54  	)
    55  
    56  	bounds := readerDocRange{startInclusive: 0, endExclusive: limit}
    57  	it := newBoundedPostingsIterator(postingsIter, bounds)
    58  
    59  	require.True(t, it.Next())
    60  	require.Equal(t, ids[0], it.Current())
    61  	require.True(t, it.Next())
    62  	require.Equal(t, ids[1], it.Current())
    63  
    64  	require.False(t, it.Next())
    65  	require.NoError(t, it.Err())
    66  
    67  	require.NoError(t, it.Close())
    68  }