Add pgbouncer input plugin (#3918)

plugins/inputs/pgbouncer/pgbouncer_test.go

@@ -0,0 +1,66 @@
+package pgbouncer
+
+import (
+	"fmt"
+	"github.com/influxdata/telegraf/plugins/inputs/postgresql"
+	"github.com/influxdata/telegraf/testutil"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"testing"
+)
+
+func TestPgBouncerGeneratesMetrics(t *testing.T) {
+	if testing.Short() {
+		t.Skip("Skipping integration test in short mode")
+	}
+
+	p := &PgBouncer{
+		Service: postgresql.Service{
+			Address: fmt.Sprintf(
+				"host=%s user=pgbouncer password=pgbouncer dbname=pgbouncer port=6432 sslmode=disable",
+				testutil.GetLocalHost(),
+			),
+			IsPgBouncer: true,
+		},
+	}
+
+	var acc testutil.Accumulator
+	require.NoError(t, p.Start(&acc))
+	require.NoError(t, p.Gather(&acc))
+
+	intMetrics := []string{
+		"total_requests",
+		"total_received",
+		"total_sent",
+		"total_query_time",
+		"avg_req",
+		"avg_recv",
+		"avg_sent",
+		"avg_query",
+		"cl_active",
+		"cl_waiting",
+		"sv_active",
+		"sv_idle",
+		"sv_used",
+		"sv_tested",
+		"sv_login",
+		"maxwait",
+	}
+
+	int32Metrics := []string{}
+
+	metricsCounted := 0
+
+	for _, metric := range intMetrics {
+		assert.True(t, acc.HasInt64Field("pgbouncer", metric))
+		metricsCounted++
+	}
+
+	for _, metric := range int32Metrics {
+		assert.True(t, acc.HasInt32Field("pgbouncer", metric))
+		metricsCounted++
+	}
+
+	assert.True(t, metricsCounted > 0)
+	assert.Equal(t, len(intMetrics)+len(int32Metrics), metricsCounted)
+}