telegraf/plugins/inputs/http/http_test.go

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package http_test
import (
"net/http"
"net/http/httptest"
"testing"
plugin "github.com/influxdata/telegraf/plugins/inputs/http"
"github.com/influxdata/telegraf/plugins/parsers"
"github.com/influxdata/telegraf/testutil"
"github.com/stretchr/testify/require"
)
func TestHTTPwithJSONFormat(t *testing.T) {
fakeServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path == "/endpoint" {
_, _ = w.Write([]byte(simpleJSON))
} else {
w.WriteHeader(http.StatusNotFound)
}
}))
defer fakeServer.Close()
url := fakeServer.URL + "/endpoint"
plugin := &plugin.HTTP{
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URLs: []string{url},
}
metricName := "metricName"
p, _ := parsers.NewJSONParser(metricName, nil, nil)
plugin.SetParser(p)
var acc testutil.Accumulator
require.NoError(t, acc.GatherError(plugin.Gather))
require.Len(t, acc.Metrics, 1)
// basic check to see if we got the right field, value and tag
var metric = acc.Metrics[0]
require.Equal(t, metric.Measurement, metricName)
require.Len(t, acc.Metrics[0].Fields, 1)
require.Equal(t, acc.Metrics[0].Fields["a"], 1.2)
require.Equal(t, acc.Metrics[0].Tags["url"], url)
}
func TestHTTPHeaders(t *testing.T) {
header := "X-Special-Header"
headerValue := "Special-Value"
fakeServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path == "/endpoint" {
if r.Header.Get(header) == headerValue {
_, _ = w.Write([]byte(simpleJSON))
} else {
w.WriteHeader(http.StatusForbidden)
}
} else {
w.WriteHeader(http.StatusNotFound)
}
}))
defer fakeServer.Close()
url := fakeServer.URL + "/endpoint"
plugin := &plugin.HTTP{
URLs: []string{url},
Headers: map[string]string{header: headerValue},
}
metricName := "metricName"
p, _ := parsers.NewJSONParser(metricName, nil, nil)
plugin.SetParser(p)
var acc testutil.Accumulator
require.NoError(t, acc.GatherError(plugin.Gather))
}
func TestInvalidStatusCode(t *testing.T) {
fakeServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusNotFound)
}))
defer fakeServer.Close()
url := fakeServer.URL + "/endpoint"
plugin := &plugin.HTTP{
URLs: []string{url},
}
metricName := "metricName"
p, _ := parsers.NewJSONParser(metricName, nil, nil)
plugin.SetParser(p)
var acc testutil.Accumulator
require.Error(t, acc.GatherError(plugin.Gather))
}
func TestParserNotSet(t *testing.T) {
fakeServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path == "/endpoint" {
_, _ = w.Write([]byte(simpleJSON))
} else {
w.WriteHeader(http.StatusNotFound)
}
}))
defer fakeServer.Close()
url := fakeServer.URL + "/endpoint"
plugin := &plugin.HTTP{
URLs: []string{url},
}
var acc testutil.Accumulator
require.Error(t, acc.GatherError(plugin.Gather))
}
const simpleJSON = `
{
"a": 1.2
}
`