github.com/xfond/eth-implementation@v1.8.9-0.20180514135602-f6bc65fc6811/metrics/resetting_timer_test.go (about)

     1  package metrics
     2  
     3  import (
     4  	"testing"
     5  	"time"
     6  )
     7  
     8  func TestResettingTimer(t *testing.T) {
     9  	tests := []struct {
    10  		values   []int64
    11  		start    int
    12  		end      int
    13  		wantP50  int64
    14  		wantP95  int64
    15  		wantP99  int64
    16  		wantMean float64
    17  		wantMin  int64
    18  		wantMax  int64
    19  	}{
    20  		{
    21  			values:  []int64{},
    22  			start:   1,
    23  			end:     11,
    24  			wantP50: 5, wantP95: 10, wantP99: 10,
    25  			wantMin: 1, wantMax: 10, wantMean: 5.5,
    26  		},
    27  		{
    28  			values:  []int64{},
    29  			start:   1,
    30  			end:     101,
    31  			wantP50: 50, wantP95: 95, wantP99: 99,
    32  			wantMin: 1, wantMax: 100, wantMean: 50.5,
    33  		},
    34  		{
    35  			values:  []int64{1},
    36  			start:   0,
    37  			end:     0,
    38  			wantP50: 1, wantP95: 1, wantP99: 1,
    39  			wantMin: 1, wantMax: 1, wantMean: 1,
    40  		},
    41  		{
    42  			values:  []int64{0},
    43  			start:   0,
    44  			end:     0,
    45  			wantP50: 0, wantP95: 0, wantP99: 0,
    46  			wantMin: 0, wantMax: 0, wantMean: 0,
    47  		},
    48  		{
    49  			values:  []int64{},
    50  			start:   0,
    51  			end:     0,
    52  			wantP50: 0, wantP95: 0, wantP99: 0,
    53  			wantMin: 0, wantMax: 0, wantMean: 0,
    54  		},
    55  		{
    56  			values:  []int64{1, 10},
    57  			start:   0,
    58  			end:     0,
    59  			wantP50: 1, wantP95: 10, wantP99: 10,
    60  			wantMin: 1, wantMax: 10, wantMean: 5.5,
    61  		},
    62  	}
    63  	for ind, tt := range tests {
    64  		timer := NewResettingTimer()
    65  
    66  		for i := tt.start; i < tt.end; i++ {
    67  			tt.values = append(tt.values, int64(i))
    68  		}
    69  
    70  		for _, v := range tt.values {
    71  			timer.Update(time.Duration(v))
    72  		}
    73  
    74  		snap := timer.Snapshot()
    75  
    76  		ps := snap.Percentiles([]float64{50, 95, 99})
    77  
    78  		val := snap.Values()
    79  
    80  		if len(val) > 0 {
    81  			if tt.wantMin != val[0] {
    82  				t.Fatalf("%d: min: got %d, want %d", ind, val[0], tt.wantMin)
    83  			}
    84  
    85  			if tt.wantMax != val[len(val)-1] {
    86  				t.Fatalf("%d: max: got %d, want %d", ind, val[len(val)-1], tt.wantMax)
    87  			}
    88  		}
    89  
    90  		if tt.wantMean != snap.Mean() {
    91  			t.Fatalf("%d: mean: got %.2f, want %.2f", ind, snap.Mean(), tt.wantMean)
    92  		}
    93  
    94  		if tt.wantP50 != ps[0] {
    95  			t.Fatalf("%d: p50: got %d, want %d", ind, ps[0], tt.wantP50)
    96  		}
    97  
    98  		if tt.wantP95 != ps[1] {
    99  			t.Fatalf("%d: p95: got %d, want %d", ind, ps[1], tt.wantP95)
   100  		}
   101  
   102  		if tt.wantP99 != ps[2] {
   103  			t.Fatalf("%d: p99: got %d, want %d", ind, ps[2], tt.wantP99)
   104  		}
   105  	}
   106  }