github.com/m3db/m3@v1.5.0/src/query/graphite/stats/statistics_test.go (about)

     1  // Copyright (c) 2019 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
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    19  // THE SOFTWARE.
    20  
    21  package stats
    22  
    23  import (
    24  	"testing"
    25  
    26  	"github.com/stretchr/testify/assert"
    27  )
    28  
    29  func TestCalc(t *testing.T) {
    30  	vals := Float64Values{20.5, 13, 74, 98, 12, 76.4, 264, 201, 98, 30, 16, 12}
    31  	a := Calc(vals)
    32  	assert.Equal(t, Statistics{
    33  		Min:    12,
    34  		Max:    264,
    35  		Mean:   76.24166666666666,
    36  		Count:  12,
    37  		Sum:    914.9,
    38  		StdDev: 81.4067839292093,
    39  	}, a)
    40  }
    41  
    42  func TestMergeAggregations(t *testing.T) {
    43  	statistics := Merge([]Statistics{
    44  		Calc(Float64Values{20.5, 13, 74, 98}),
    45  		Calc(Float64Values{12, 76.4, 264, 201}),
    46  		Calc(Float64Values{98, 30, 16, 12}),
    47  		Statistics{
    48  			Count: 0,
    49  		},
    50  	})
    51  	assert.Equal(t, Statistics{
    52  		Min:    12,
    53  		Max:    264,
    54  		Mean:   76.24166666666666,
    55  		Count:  12,
    56  		Sum:    914.9,
    57  		StdDev: 86.30370872036085,
    58  	}, statistics)
    59  }
    60  
    61  func TestMergeEmptyAggregations(t *testing.T) {
    62  	statistics := Merge([]Statistics{
    63  		Statistics{Count: 0},
    64  		Statistics{Count: 0},
    65  	})
    66  	assert.Equal(t, Statistics{}, statistics)
    67  }