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package cloudwatch2
import (
"context"
"strings"
"testing"
"github.com/aws/aws-sdk-go-v2/service/cloudwatch"
"github.com/aws/aws-sdk-go-v2/service/cloudwatch/types"
)
func TestStats(t *testing.T) {
testCases := []struct {
name string
vals []float64
xMin float64
xMax float64
xSum float64
xCt float64
}{
{
"empty",
[]float64{},
0.0,
0.0,
0.0,
0.0,
},
{
"single",
[]float64{3.1416},
3.1416,
3.1416,
3.1416,
1.0,
},
{
"double",
[]float64{1.0, 9.0},
1.0,
9.0,
10.0,
2.0,
},
{
"multiple",
[]float64{5.0, 1.0, 9.0, 5.0},
1.0,
9.0,
20.0,
4.0,
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
s := stats(tc.vals)
if tc.xMin != *s.Minimum {
t.Errorf("expected [%f]: %f\n", tc.xMin, *s.Minimum)
}
if tc.xMax != *s.Maximum {
t.Errorf("expected [%f]: %f\n", tc.xMax, *s.Maximum)
}
if tc.xSum != *s.Sum {
t.Errorf("expected [%f]: %f\n", tc.xSum, *s.Sum)
}
if tc.xCt != *s.SampleCount {
t.Errorf("expected [%f]: %f\n", tc.xCt, *s.SampleCount)
}
})
}
}
type mockCloudWatch struct {
CloudWatchAPI
latestName string
latestData []types.MetricDatum
}
func (mcw *mockCloudWatch) PutMetricData(ctx context.Context, params *cloudwatch.PutMetricDataInput, optFns ...func(*cloudwatch.Options)) (*cloudwatch.PutMetricDataOutput, error) {
mcw.latestName = *params.Namespace
mcw.latestData = params.MetricData
return nil, nil
}
func TestSend(t *testing.T) {
ns := "example-namespace"
svc := &mockCloudWatch{}
cw := New(ns, svc)
c := cw.NewCounter("c").With("charlie", "cat")
h := cw.NewHistogram("h").With("hotel", "horse")
g := cw.NewGauge("g").With("golf", "giraffe")
c.Add(4.0)
c.Add(5.0)
c.Add(6.0)
h.Observe(3.0)
h.Observe(5.0)
h.Observe(7.0)
g.Set(2.0)
g.Set(5.0)
g.Set(8.0)
err := cw.Send()
if err != nil {
t.Fatalf("unexpected: %v\n", err)
}
if ns != svc.latestName {
t.Errorf("expected namespace %q; not %q\n", ns, svc.latestName)
}
if len(svc.latestData) != 3 {
t.Errorf("expected 3 datums: %v\n", svc.latestData)
}
for _, datum := range svc.latestData {
initial := *datum.MetricName
if len(datum.Dimensions) != 1 {
t.Errorf("expected 1 dimension: %v\n", datum)
}
if !strings.HasPrefix(*datum.Dimensions[0].Name, initial) {
t.Errorf("expected %q in Name of %v\n", initial, datum.Dimensions)
}
if !strings.HasPrefix(*datum.Dimensions[0].Value, initial) {
t.Errorf("expected %q in Value of %v\n", initial, datum.Dimensions)
}
if datum.StatisticValues == nil {
t.Errorf("expected StatisticValues in %v\n", datum)
}
if *datum.StatisticValues.Sum != 15.0 {
t.Errorf("expected 15.0 for Sum in %v\n", datum)
}
if *datum.StatisticValues.SampleCount != 3.0 {
t.Errorf("expected 3.0 for SampleCount in %v\n", datum)
}
}
}
|
