github.com/m3db/m3@v1.5.0/src/dbnode/storage/util_test.go (about)

     1  // Copyright (c) 2017 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 storage
    22  
    23  import (
    24  	"testing"
    25  	"time"
    26  
    27  	"github.com/stretchr/testify/require"
    28  
    29  	xtime "github.com/m3db/m3/src/x/time"
    30  )
    31  
    32  func TestNumIntervals(t *testing.T) {
    33  	var (
    34  		bs      = 10
    35  		timeFor = func(i int) xtime.UnixNano {
    36  			return xtime.FromSeconds(int64(bs * i))
    37  		}
    38  	)
    39  
    40  	w := time.Second * time.Duration(bs)
    41  	t0 := timeFor(0)
    42  	t1 := timeFor(1)
    43  
    44  	require.Equal(t, 0, numIntervals(t1, t0, w))
    45  	require.Equal(t, 1, numIntervals(t0, t0, w))
    46  	require.Equal(t, 2, numIntervals(t0, t1, w))
    47  }
    48  
    49  func TestNumIntervalsStartEqualsEnd(t *testing.T) {
    50  	s := xtime.Now()
    51  	w := time.Minute
    52  	require.Equal(t, 1, numIntervals(s, s, w))
    53  }
    54  
    55  func TestNumIntervalsStartAfterEnd(t *testing.T) {
    56  	w := time.Minute
    57  	end := xtime.Now()
    58  	start := end.Add(w)
    59  	require.Equal(t, 0, numIntervals(start, end, w))
    60  }
    61  
    62  func TestNumIntervalsZeroWindow(t *testing.T) {
    63  	w := time.Duration(0)
    64  	s := xtime.Now()
    65  	require.Equal(t, 0, numIntervals(s, s, w))
    66  }
    67  
    68  func TestNumIntervalsNegativeWindow(t *testing.T) {
    69  	w := -time.Minute
    70  	s := xtime.Now()
    71  	require.Equal(t, 0, numIntervals(s, s, w))
    72  }
    73  
    74  func TestTimesInRange(t *testing.T) {
    75  	var (
    76  		w       = 10 * time.Second
    77  		timeFor = func(i int64) xtime.UnixNano {
    78  			return xtime.UnixNano(int64(w) * i)
    79  		}
    80  		timesForN = func(i, j int64) []xtime.UnixNano {
    81  			times := make([]xtime.UnixNano, 0, j-i+1)
    82  			for k := j; k >= i; k-- {
    83  				times = append(times, timeFor(k))
    84  			}
    85  			return times
    86  		}
    87  	)
    88  	// [0, 2] with a gap of 1 ==> [0, 1, 2]
    89  	require.Equal(t, []xtime.UnixNano{timeFor(2), timeFor(1), timeFor(0)},
    90  		timesInRange(timeFor(0), timeFor(2), w))
    91  
    92  	// [2, 1] with a gap of 1 ==> empty result
    93  	require.Empty(t, timesInRange(timeFor(2), timeFor(1), w))
    94  
    95  	// [2, 2] with a gap of 1 ==> [2]
    96  	require.Equal(t, []xtime.UnixNano{timeFor(2)},
    97  		timesInRange(timeFor(2), timeFor(2), w))
    98  
    99  	// [0, 9] with a gap of 3 ==> [9, 6, 3, 0]
   100  	require.Equal(t, []xtime.UnixNano{timeFor(9), timeFor(6), timeFor(3), timeFor(0)},
   101  		timesInRange(timeFor(0), timeFor(9), 3*w))
   102  
   103  	// [1, 9] with a gap of 3 ==> [9, 6, 3]
   104  	require.Equal(t, []xtime.UnixNano{timeFor(9), timeFor(6), timeFor(3)},
   105  		timesInRange(timeFor(1), timeFor(9), 3*w))
   106  
   107  	// [1, 100] with a gap of 1 ==> [100, 99, ..., 1]
   108  	require.Equal(t, timesForN(1, 100), timesInRange(timeFor(1), timeFor(100), w))
   109  }