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

     1  // Copyright (c) 2022 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
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     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 index
    22  
    23  import (
    24  	"strconv"
    25  	"testing"
    26  
    27  	"github.com/stretchr/testify/require"
    28  )
    29  
    30  func TestResultsUtilizationStatsConstant(t *testing.T) {
    31  	r := resultsUtilizationStats{}
    32  	for i := 0; i < 2*consecutiveTimesUnderCapacityThreshold; i++ {
    33  		require.True(t, r.updateAndCheck(100), strconv.Itoa(i))
    34  	}
    35  }
    36  
    37  func TestResultsUtilizationStatsIncreasing(t *testing.T) {
    38  	r := resultsUtilizationStats{}
    39  	for i := 0; i < 2*consecutiveTimesUnderCapacityThreshold; i++ {
    40  		require.True(t, r.updateAndCheck(i), strconv.Itoa(i))
    41  	}
    42  }
    43  
    44  func TestResultsUtilizationStatsDecreasing(t *testing.T) {
    45  	r := resultsUtilizationStats{}
    46  	for i := consecutiveTimesUnderCapacityThreshold; i > 0; i-- {
    47  		require.True(t, r.updateAndCheck(i), strconv.Itoa(i))
    48  	}
    49  	require.False(t, r.updateAndCheck(0))
    50  }
    51  
    52  func TestResultsUtilizationStatsAllSmallerThanFirst(t *testing.T) {
    53  	r := resultsUtilizationStats{}
    54  	require.True(t, r.updateAndCheck(100))
    55  	for i := 1; i < consecutiveTimesUnderCapacityThreshold; i++ {
    56  		require.True(t, r.updateAndCheck(99), strconv.Itoa(i))
    57  	}
    58  	require.False(t, r.updateAndCheck(99))
    59  }
    60  
    61  func TestResultsUtilizationStatsAlternating(t *testing.T) {
    62  	r := resultsUtilizationStats{}
    63  	for i := 0; i < 10*consecutiveTimesUnderCapacityThreshold; i++ {
    64  		require.True(t, r.updateAndCheck(i%5), strconv.Itoa(i))
    65  	}
    66  }