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Merge pull request #84117 from conwaychriscosmo/refactor-counter_test

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refactored counter_test to use assert statements and renamed variable…
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Kubernetes Prow Robot 2019-10-24 11:55:54 -07:00 committed by GitHub
commit e0cc347f6e
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1 changed files with 23 additions and 43 deletions
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66
staging/src/k8s.io/component-base/metrics/counter_test.go
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@ -22,6 +22,7 @@ import (
"github.com/blang/semver"
"github.com/prometheus/common/expfmt"
"github.com/stretchr/testify/assert"
apimachineryversion "k8s.io/apimachinery/pkg/version"
)
@ -79,27 +80,19 @@ func TestCounter(t *testing.T) {
Minor: "15",
GitVersion: "v1.15.0-alpha-1.12345",
})
// c is a pointer to a Counter
c := NewCounter(test.CounterOpts)
registry.MustRegister(c)
ms, err := registry.Gather()
// mfs is a pointer to a dto.MetricFamily slice
mfs, err := registry.Gather()
var buf bytes.Buffer
enc := expfmt.NewEncoder(&buf, "text/plain; version=0.0.4; charset=utf-8")
if len(ms) != test.expectedMetricCount {
t.Errorf("Got %v metrics, Want: %v metrics", len(ms), test.expectedMetricCount)
}
if err != nil {
t.Fatalf("Gather failed %v", err)
}
for _, metric := range ms {
assert.Equalf(t, test.expectedMetricCount, len(mfs), "Got %v metrics, Want: %v metrics", len(mfs), test.expectedMetricCount)
assert.Nil(t, err, "Gather failed %v", err)
for _, metric := range mfs {
err := enc.Encode(metric)
if err != nil {
t.Fatalf("Unexpected err %v in encoding the metric", err)
}
if metric.GetHelp() != test.expectedHelp {
t.Errorf("Got %s as help message, want %s", metric.GetHelp(), test.expectedHelp)
}
assert.Nil(t, err, "Unexpected err %v in encoding the metric", err)
assert.Equalf(t, test.expectedHelp, metric.GetHelp(), "Got %s as help message, want %s", metric.GetHelp(), test.expectedHelp)
}
// increment the counter N number of times and verify that the metric retains the count correctly
@ -107,15 +100,13 @@ func TestCounter(t *testing.T) {
for i := 0; i < numberOfTimesToIncrement; i++ {
c.Inc()
}
ms, err = registry.Gather()
if err != nil {
t.Fatalf("Gather failed %v", err)
}
for _, mf := range ms {
for _, m := range mf.GetMetric() {
if int(m.GetCounter().GetValue()) != numberOfTimesToIncrement {
t.Errorf("Got %v, wanted %v as the count", m.GetCounter().GetValue(), numberOfTimesToIncrement)
}
mfs, err = registry.Gather()
assert.Nil(t, err, "Gather failed %v", err)
for _, mf := range mfs {
mfMetric := mf.GetMetric()
for _, m := range mfMetric {
assert.Equalf(t, numberOfTimesToIncrement, int(m.GetCounter().GetValue()), "Got %v, wanted %v as the count", m.GetCounter().GetValue(), numberOfTimesToIncrement)
}
}
})
@ -195,35 +186,24 @@ func TestCounterVec(t *testing.T) {
registry.MustRegister(c)
c.WithLabelValues("1", "2").Inc()
mfs, err := registry.Gather()
if len(mfs) != test.expectedMetricFamilyCount {
t.Errorf("Got %v metric families, Want: %v metric families", len(mfs), test.expectedMetricFamilyCount)
}
if err != nil {
t.Fatalf("Gather failed %v", err)
}
assert.Equalf(t, test.expectedMetricFamilyCount, len(mfs), "Got %v metric families, Want: %v metric families", len(mfs), test.expectedMetricFamilyCount)
assert.Nil(t, err, "Gather failed %v", err)
// this no-opts here when there are no metric families (i.e. when the metric is hidden)
for _, mf := range mfs {
if len(mf.GetMetric()) != 1 {
t.Errorf("Got %v metrics, wanted 1 as the count", len(mf.GetMetric()))
}
if mf.GetHelp() != test.expectedHelp {
t.Errorf("Got %s as help message, want %s", mf.GetHelp(), test.expectedHelp)
}
assert.Equalf(t, 1, len(mf.GetMetric()), "Got %v metrics, wanted 1 as the count", len(mf.GetMetric()))
assert.Equalf(t, test.expectedHelp, mf.GetHelp(), "Got %s as help message, want %s", mf.GetHelp(), test.expectedHelp)
}
// let's increment the counter and verify that the metric still works
c.WithLabelValues("1", "3").Inc()
c.WithLabelValues("2", "3").Inc()
mfs, err = registry.Gather()
if err != nil {
t.Fatalf("Gather failed %v", err)
}
assert.Nil(t, err, "Gather failed %v", err)
// this no-opts here when there are no metric families (i.e. when the metric is hidden)
for _, mf := range mfs {
if len(mf.GetMetric()) != 3 {
t.Errorf("Got %v metrics, wanted 3 as the count", len(mf.GetMetric()))
}
assert.Equalf(t, 3, len(mf.GetMetric()), "Got %v metrics, wanted 3 as the count", len(mf.GetMetric()))
}
})
}