106 lines
3.2 KiB
Go
106 lines
3.2 KiB
Go
package prometheus
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import (
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"fmt"
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"net/http"
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"net/http/httptest"
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"net/url"
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"testing"
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"time"
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"github.com/influxdata/telegraf/testutil"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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const sampleTextFormat = `# HELP go_gc_duration_seconds A summary of the GC invocation durations.
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# TYPE go_gc_duration_seconds summary
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go_gc_duration_seconds{quantile="0"} 0.00010425500000000001
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go_gc_duration_seconds{quantile="0.25"} 0.000139108
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go_gc_duration_seconds{quantile="0.5"} 0.00015749400000000002
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go_gc_duration_seconds{quantile="0.75"} 0.000331463
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go_gc_duration_seconds{quantile="1"} 0.000667154
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go_gc_duration_seconds_sum 0.0018183950000000002
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go_gc_duration_seconds_count 7
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# HELP go_goroutines Number of goroutines that currently exist.
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# TYPE go_goroutines gauge
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go_goroutines 15
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# HELP test_metric An untyped metric with a timestamp
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# TYPE test_metric untyped
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test_metric{label="value"} 1.0 1490802350000
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`
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func TestPrometheusGeneratesMetrics(t *testing.T) {
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintln(w, sampleTextFormat)
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}))
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defer ts.Close()
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p := &Prometheus{
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URLs: []string{ts.URL},
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}
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var acc testutil.Accumulator
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err := acc.GatherError(p.Gather)
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require.NoError(t, err)
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assert.True(t, acc.HasFloatField("go_gc_duration_seconds", "count"))
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assert.True(t, acc.HasFloatField("go_goroutines", "gauge"))
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assert.True(t, acc.HasFloatField("test_metric", "value"))
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assert.True(t, acc.HasTimestamp("test_metric", time.Unix(1490802350, 0)))
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assert.False(t, acc.HasTag("test_metric", "address"))
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assert.True(t, acc.TagValue("test_metric", "url") == ts.URL)
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}
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func TestPrometheusGeneratesMetricsWithHostNameTag(t *testing.T) {
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintln(w, sampleTextFormat)
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}))
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defer ts.Close()
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p := &Prometheus{
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KubernetesServices: []string{ts.URL},
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}
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u, _ := url.Parse(ts.URL)
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tsAddress := u.Hostname()
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var acc testutil.Accumulator
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err := acc.GatherError(p.Gather)
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require.NoError(t, err)
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assert.True(t, acc.HasFloatField("go_gc_duration_seconds", "count"))
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assert.True(t, acc.HasFloatField("go_goroutines", "gauge"))
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assert.True(t, acc.HasFloatField("test_metric", "value"))
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assert.True(t, acc.HasTimestamp("test_metric", time.Unix(1490802350, 0)))
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assert.True(t, acc.TagValue("test_metric", "address") == tsAddress)
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assert.True(t, acc.TagValue("test_metric", "url") == ts.URL)
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}
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func TestPrometheusGeneratesMetricsAlthoughFirstDNSFails(t *testing.T) {
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if testing.Short() {
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t.Skip("Skipping integration test in short mode")
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}
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintln(w, sampleTextFormat)
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}))
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defer ts.Close()
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p := &Prometheus{
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URLs: []string{ts.URL},
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KubernetesServices: []string{"http://random.telegraf.local:88/metrics"},
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}
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var acc testutil.Accumulator
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err := acc.GatherError(p.Gather)
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require.NoError(t, err)
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assert.True(t, acc.HasFloatField("go_gc_duration_seconds", "count"))
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assert.True(t, acc.HasFloatField("go_goroutines", "gauge"))
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assert.True(t, acc.HasFloatField("test_metric", "value"))
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assert.True(t, acc.HasTimestamp("test_metric", time.Unix(1490802350, 0)))
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}
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