Add influx v2 output plugin (#4645)

plugins/outputs/influxdb_v2/http_internal_test.go

@@ -0,0 +1,59 @@
+package influxdb_v2
+
+import (
+	"io"
+	"net/url"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func genURL(u string) *url.URL {
+	URL, _ := url.Parse(u)
+	return URL
+}
+
+func TestMakeWriteURL(t *testing.T) {
+	tests := []struct {
+		err bool
+		url *url.URL
+		act string
+	}{
+		{
+			url: genURL("http://localhost:9999"),
+			act: "http://localhost:9999/v2/write?bucket=telegraf&org=influx",
+		},
+		{
+			url: genURL("unix://var/run/influxd.sock"),
+			act: "http://127.0.0.1/v2/write?bucket=telegraf&org=influx",
+		},
+		{
+			err: true,
+			url: genURL("udp://localhost:9999"),
+		},
+	}
+
+	for i := range tests {
+		rURL, err := makeWriteURL(*tests[i].url, "influx", "telegraf")
+		if !tests[i].err {
+			require.NoError(t, err)
+		} else {
+			require.Error(t, err)
+			t.Log(err)
+		}
+		if err == nil {
+			require.Equal(t, tests[i].act, rURL)
+		}
+	}
+}
+
+func TestMakeWriteRequest(t *testing.T) {
+	reader, _ := io.Pipe()
+	cli := httpClient{
+		WriteURL:        "http://localhost:9999/v2/write?bucket=telegraf&org=influx",
+		ContentEncoding: "gzip",
+		Headers:         map[string]string{"x": "y"},
+	}
+	_, err := cli.makeWriteRequest(reader)
+	require.NoError(t, err)
+}