github.com/m3db/m3@v1.5.0/src/m3ninx/postings/range_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 postings
    22  
    23  import (
    24  	"testing"
    25  
    26  	"github.com/stretchr/testify/require"
    27  )
    28  
    29  func TestRangeIterator(t *testing.T) {
    30  	iter := NewRangeIterator(0, 2)
    31  	require.True(t, iter.Next())
    32  	require.Equal(t, ID(0), iter.Current())
    33  	require.True(t, iter.Next())
    34  	require.Equal(t, ID(1), iter.Current())
    35  	require.False(t, iter.Next())
    36  	require.NoError(t, iter.Err())
    37  	require.NoError(t, iter.Close())
    38  	require.Error(t, iter.Close())
    39  }
    40  func TestRangeIteratorEmpty(t *testing.T) {
    41  	iter := NewRangeIterator(3, 2)
    42  	require.False(t, iter.Next())
    43  	require.NoError(t, iter.Err())
    44  	require.NoError(t, iter.Close())
    45  	require.Error(t, iter.Close())
    46  }
    47  
    48  func TestRangeIteratorEmptyIdentical(t *testing.T) {
    49  	iter := NewRangeIterator(2, 2)
    50  	require.False(t, iter.Next())
    51  	require.NoError(t, iter.Err())
    52  	require.NoError(t, iter.Close())
    53  	require.Error(t, iter.Close())
    54  }