gitlab.com/aquachain/aquachain@v1.17.16-rc3.0.20221018032414-e3ddf1e1c055/common/metrics/histogram_test.go (about)

     1  // Copyright 2018 The aquachain Authors
     2  // This file is part of the aquachain library.
     3  //
     4  // The aquachain library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The aquachain library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the aquachain library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package metrics
    18  
    19  import "testing"
    20  
    21  func BenchmarkHistogram(b *testing.B) {
    22  	h := NewHistogram(NewUniformSample(100))
    23  	b.ResetTimer()
    24  	for i := 0; i < b.N; i++ {
    25  		h.Update(int64(i))
    26  	}
    27  }
    28  
    29  func TestGetOrRegisterHistogram(t *testing.T) {
    30  	r := NewRegistry()
    31  	s := NewUniformSample(100)
    32  	NewRegisteredHistogram("foo", r, s).Update(47)
    33  	if h := GetOrRegisterHistogram("foo", r, s); 1 != h.Count() {
    34  		t.Fatal(h)
    35  	}
    36  }
    37  
    38  func TestHistogram10000(t *testing.T) {
    39  	h := NewHistogram(NewUniformSample(100000))
    40  	for i := 1; i <= 10000; i++ {
    41  		h.Update(int64(i))
    42  	}
    43  	testHistogram10000(t, h)
    44  }
    45  
    46  func TestHistogramEmpty(t *testing.T) {
    47  	h := NewHistogram(NewUniformSample(100))
    48  	if count := h.Count(); 0 != count {
    49  		t.Errorf("h.Count(): 0 != %v\n", count)
    50  	}
    51  	if min := h.Min(); 0 != min {
    52  		t.Errorf("h.Min(): 0 != %v\n", min)
    53  	}
    54  	if max := h.Max(); 0 != max {
    55  		t.Errorf("h.Max(): 0 != %v\n", max)
    56  	}
    57  	if mean := h.Mean(); 0.0 != mean {
    58  		t.Errorf("h.Mean(): 0.0 != %v\n", mean)
    59  	}
    60  	if stdDev := h.StdDev(); 0.0 != stdDev {
    61  		t.Errorf("h.StdDev(): 0.0 != %v\n", stdDev)
    62  	}
    63  	ps := h.Percentiles([]float64{0.5, 0.75, 0.99})
    64  	if 0.0 != ps[0] {
    65  		t.Errorf("median: 0.0 != %v\n", ps[0])
    66  	}
    67  	if 0.0 != ps[1] {
    68  		t.Errorf("75th percentile: 0.0 != %v\n", ps[1])
    69  	}
    70  	if 0.0 != ps[2] {
    71  		t.Errorf("99th percentile: 0.0 != %v\n", ps[2])
    72  	}
    73  }
    74  
    75  func TestHistogramSnapshot(t *testing.T) {
    76  	h := NewHistogram(NewUniformSample(100000))
    77  	for i := 1; i <= 10000; i++ {
    78  		h.Update(int64(i))
    79  	}
    80  	snapshot := h.Snapshot()
    81  	h.Update(0)
    82  	testHistogram10000(t, snapshot)
    83  }
    84  
    85  func testHistogram10000(t *testing.T, h Histogram) {
    86  	if count := h.Count(); 10000 != count {
    87  		t.Errorf("h.Count(): 10000 != %v\n", count)
    88  	}
    89  	if min := h.Min(); 1 != min {
    90  		t.Errorf("h.Min(): 1 != %v\n", min)
    91  	}
    92  	if max := h.Max(); 10000 != max {
    93  		t.Errorf("h.Max(): 10000 != %v\n", max)
    94  	}
    95  	if mean := h.Mean(); 5000.5 != mean {
    96  		t.Errorf("h.Mean(): 5000.5 != %v\n", mean)
    97  	}
    98  	if stdDev := h.StdDev(); 2886.751331514372 != stdDev {
    99  		t.Errorf("h.StdDev(): 2886.751331514372 != %v\n", stdDev)
   100  	}
   101  	ps := h.Percentiles([]float64{0.5, 0.75, 0.99})
   102  	if 5000.5 != ps[0] {
   103  		t.Errorf("median: 5000.5 != %v\n", ps[0])
   104  	}
   105  	if 7500.75 != ps[1] {
   106  		t.Errorf("75th percentile: 7500.75 != %v\n", ps[1])
   107  	}
   108  	if 9900.99 != ps[2] {
   109  		t.Errorf("99th percentile: 9900.99 != %v\n", ps[2])
   110  	}
   111  }