github.com/m3db/m3@v1.5.0/src/aggregator/aggregation/quantile/cm/list_test.go (about)

     1  // Copyright (c) 2016 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 cm
    22  
    23  import (
    24  	"testing"
    25  
    26  	"github.com/stretchr/testify/require"
    27  )
    28  
    29  func validateList(t *testing.T, l *sampleList, expected []float64) {
    30  	t.Helper()
    31  	require.Equal(t, l.Len(), len(expected))
    32  	i := 0
    33  	for sample := l.Front(); sample != nil; sample = sample.next {
    34  		require.Equal(t, expected[i], sample.value)
    35  		i++
    36  	}
    37  	if len(expected) == 0 {
    38  		require.Nil(t, l.head)
    39  		require.Nil(t, l.tail)
    40  	} else {
    41  		require.Equal(t, l.Front(), l.head)
    42  		require.Nil(t, l.head.prev)
    43  		require.Equal(t, l.Back(), l.tail)
    44  		require.Nil(t, l.tail.next)
    45  	}
    46  }
    47  
    48  func TestSampleListPushBack(t *testing.T) {
    49  	var (
    50  		l      sampleList
    51  		iter   = 10
    52  		inputs = make([]float64, iter)
    53  	)
    54  	for i := 0; i < iter; i++ {
    55  		inputs[i] = float64(i)
    56  		s := l.Acquire()
    57  		s.value = float64(i)
    58  		l.PushBack(s)
    59  	}
    60  	validateList(t, &l, inputs)
    61  }
    62  
    63  func TestSampleListInsertBefore(t *testing.T) {
    64  	var (
    65  		l      sampleList
    66  		iter   = 10
    67  		inputs = make([]float64, iter)
    68  	)
    69  	var prev *Sample
    70  	for i := iter - 1; i >= 0; i-- {
    71  		inputs[i] = float64(i)
    72  		sample := l.Acquire()
    73  		sample.value = float64(i)
    74  		if i == iter-1 {
    75  			l.PushBack(sample)
    76  		} else {
    77  			l.InsertBefore(sample, prev)
    78  		}
    79  		prev = sample
    80  	}
    81  	validateList(t, &l, inputs)
    82  }
    83  
    84  func TestSampleListRemove(t *testing.T) {
    85  	var (
    86  		l      sampleList
    87  		iter   = 10
    88  		inputs = make([]float64, iter)
    89  	)
    90  	for i := 0; i < iter; i++ {
    91  		inputs[i] = float64(i)
    92  		sample := l.Acquire()
    93  		sample.value = float64(i)
    94  		l.PushBack(sample)
    95  	}
    96  	for i := 0; i < iter; i++ {
    97  		elem := l.Front()
    98  		l.Remove(elem)
    99  		validateList(t, &l, inputs[i+1:])
   100  	}
   101  }