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path: root/metrics/counter_test.go
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package metrics

import "testing"

func BenchmarkCounter(b *testing.B) {
    c := NewCounter()
    b.ResetTimer()
    for i := 0; i < b.N; i++ {
        c.Inc(1)
    }
}

func TestCounterClear(t *testing.T) {
    c := NewCounter()
    c.Inc(1)
    c.Clear()
    if count := c.Count(); 0 != count {
        t.Errorf("c.Count(): 0 != %v\n", count)
    }
}

func TestCounterDec1(t *testing.T) {
    c := NewCounter()
    c.Dec(1)
    if count := c.Count(); -1 != count {
        t.Errorf("c.Count(): -1 != %v\n", count)
    }
}

func TestCounterDec2(t *testing.T) {
    c := NewCounter()
    c.Dec(2)
    if count := c.Count(); -2 != count {
        t.Errorf("c.Count(): -2 != %v\n", count)
    }
}

func TestCounterInc1(t *testing.T) {
    c := NewCounter()
    c.Inc(1)
    if count := c.Count(); 1 != count {
        t.Errorf("c.Count(): 1 != %v\n", count)
    }
}

func TestCounterInc2(t *testing.T) {
    c := NewCounter()
    c.Inc(2)
    if count := c.Count(); 2 != count {
        t.Errorf("c.Count(): 2 != %v\n", count)
    }
}

func TestCounterSnapshot(t *testing.T) {
    c := NewCounter()
    c.Inc(1)
    snapshot := c.Snapshot()
    c.Inc(1)
    if count := snapshot.Count(); 1 != count {
        t.Errorf("c.Count(): 1 != %v\n", count)
    }
}

func TestCounterZero(t *testing.T) {
    c := NewCounter()
    if count := c.Count(); 0 != count {
        t.Errorf("c.Count(): 0 != %v\n", count)
    }
}

func TestGetOrRegisterCounter(t *testing.T) {
    r := NewRegistry()
    NewRegisteredCounter("foo", r).Inc(47)
    if c := GetOrRegisterCounter("foo", r); 47 != c.Count() {
        t.Fatal(c)
    }
}