65 lines
1.8 KiB
Go
65 lines
1.8 KiB
Go
package metrics
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import (
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"strings"
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"testing"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/stretchr/testify/require"
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)
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func TestDescribeAll(t *testing.T) {
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const (
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namespace = "my_ns"
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subsystem = "mysub"
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)
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mustRegister(newCounter(prometheus.CounterOpts{
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Namespace: namespace,
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Subsystem: subsystem,
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Name: "my_counter",
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}))
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labels := []string{"label1", "label2"}
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mustRegister(newGaugeVec(prometheus.GaugeOpts{
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Namespace: namespace,
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Subsystem: subsystem,
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Name: "my_gauge",
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}, labels))
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constLabels := prometheus.Labels{
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"const1": "abc",
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"const2": "xyz",
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}
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mustRegister(newCounter(prometheus.CounterOpts{
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Namespace: namespace,
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Subsystem: subsystem,
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Name: "with_const_labels",
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ConstLabels: constLabels,
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}))
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descriptions, err := DescribeAll()
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require.NoError(t, err)
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seen := make(map[string]bool)
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for i := range descriptions {
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if !strings.HasPrefix(descriptions[i].Name, namespace) {
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continue
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}
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require.False(t, seen[descriptions[i].Name], "metric %s was seen twice", descriptions[i].Name)
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seen[descriptions[i].Name] = true
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switch descriptions[i].Name {
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case prometheus.BuildFQName(namespace, subsystem, "my_counter"):
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require.True(t, len(descriptions[i].VariableLabels) == 0)
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case prometheus.BuildFQName(namespace, subsystem, "my_gauge"):
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require.Equal(t, labels, descriptions[i].VariableLabels)
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case prometheus.BuildFQName(namespace, subsystem, "with_const_labels"):
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require.Equal(t, len(constLabels), len(descriptions[i].ConstantLabels))
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require.Equal(t, constLabels, descriptions[i].ConstantLabels)
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default:
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require.FailNow(t, "unexpected metric name: %s", descriptions[i].Name)
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}
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}
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require.Equal(t, 3, len(seen), "not all registered metrics were iterated over")
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}
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