func TestPrometheusGeneratesMetrics(t *testing.T) {
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, sampleTextFormat)
}))
defer ts.Close()
p := &Prometheus{
Urls: []string{ts.URL},
}
var acc testutil.Accumulator
err := p.Gather(&acc)
require.NoError(t, err)
expected := []struct {
name string
value float64
tags map[string]string
}{
{"go_gc_duration_seconds_count", 7, map[string]string{}},
{"go_goroutines", 15, map[string]string{}},
}
for _, e := range expected {
assert.NoError(t, acc.ValidateValue(e.name, e.value))
}
}