vitess.io/vitess@v0.16.2/go/stats/counter_test.go (about)

     1  /*
     2  Copyright 2019 The Vitess Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package stats
    18  
    19  import (
    20  	"expvar"
    21  	"testing"
    22  
    23  	"github.com/stretchr/testify/assert"
    24  )
    25  
    26  func TestCounter(t *testing.T) {
    27  	var gotname string
    28  	var gotv *Counter
    29  	clear()
    30  	Register(func(name string, v expvar.Var) {
    31  		gotname = name
    32  		gotv = v.(*Counter)
    33  	})
    34  	v := NewCounter("Int", "help")
    35  	if gotname != "Int" {
    36  		t.Errorf("want Int, got %s", gotname)
    37  	}
    38  	if gotv != v {
    39  		t.Errorf("want %#v, got %#v", v, gotv)
    40  	}
    41  	v.Add(1)
    42  	if v.Get() != 1 {
    43  		t.Errorf("want 1, got %v", v.Get())
    44  	}
    45  	if v.String() != "1" {
    46  		t.Errorf("want 1, got %v", v.Get())
    47  	}
    48  	v.Reset()
    49  	if v.Get() != 0 {
    50  		t.Errorf("want 0, got %v", v.Get())
    51  	}
    52  }
    53  
    54  func TestGaugeFunc(t *testing.T) {
    55  	var gotname string
    56  	var gotv *GaugeFunc
    57  	clear()
    58  	Register(func(name string, v expvar.Var) {
    59  		gotname = name
    60  		gotv = v.(*GaugeFunc)
    61  	})
    62  
    63  	v := NewGaugeFunc("name", "help", func() int64 {
    64  		return 1
    65  	})
    66  	if gotname != "name" {
    67  		t.Errorf("want name, got %s", gotname)
    68  	}
    69  	if gotv != v {
    70  		t.Errorf("want %#v, got %#v", v, gotv)
    71  	}
    72  	if v.String() != "1" {
    73  		t.Errorf("want 1, got %v", v.String())
    74  	}
    75  }
    76  
    77  func TestGaugeFloat64(t *testing.T) {
    78  	var gotname string
    79  	var gotv *GaugeFloat64
    80  	clear()
    81  	Register(func(name string, v expvar.Var) {
    82  		gotname = name
    83  		gotv = v.(*GaugeFloat64)
    84  	})
    85  	v := NewGaugeFloat64("f", "help")
    86  	assert.Equal(t, "f", gotname)
    87  	assert.Equal(t, v, gotv)
    88  	v.Set(3.14)
    89  	assert.Equal(t, 3.14, v.Get())
    90  	assert.Equal(t, "3.14", v.String())
    91  	v.Reset()
    92  	assert.Equal(t, float64(0), v.Get())
    93  }