InfluxDB output: add tests and a README

outputs/influxdb/influxdb_test.go

@@ -0,0 +1,41 @@
+package influxdb
+
+import (
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/influxdb/telegraf/testutil"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestUDPInflux(t *testing.T) {
+	i := InfluxDB{
+		URLs: []string{"udp://localhost:8089"},
+	}
+
+	err := i.Connect()
+	require.NoError(t, err)
+	err = i.Write(testutil.MockBatchPoints().Points())
+	require.NoError(t, err)
+}
+
+func TestHTTPInflux(t *testing.T) {
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+		w.Header().Set("Content-Type", "application/json")
+		fmt.Fprintln(w, `{"results":[{}]}`)
+	}))
+	defer ts.Close()
+
+	i := InfluxDB{
+		URLs: []string{ts.URL},
+	}
+
+	err := i.Connect()
+	require.NoError(t, err)
+	err = i.Write(testutil.MockBatchPoints().Points())
+	require.NoError(t, err)
+}