310 lines
8.3 KiB
Go
310 lines
8.3 KiB
Go
// Copyright 2016 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package push
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import (
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"bytes"
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"errors"
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"io"
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"net/http"
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"net/http/httptest"
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"testing"
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"github.com/prometheus/common/expfmt"
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"github.com/prometheus/client_golang/prometheus"
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)
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func TestPush(t *testing.T) {
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var (
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lastMethod string
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lastBody []byte
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lastPath string
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lastHeader http.Header
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)
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// Fake a Pushgateway that responds with 202 to DELETE and with 200 in
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// all other cases.
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pgwOK := httptest.NewServer(
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http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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lastMethod = r.Method
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lastHeader = r.Header
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var err error
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lastBody, err = io.ReadAll(r.Body)
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if err != nil {
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t.Fatal(err)
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}
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lastPath = r.URL.EscapedPath()
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w.Header().Set("Content-Type", `text/plain; charset=utf-8`)
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if r.Method == http.MethodDelete {
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w.WriteHeader(http.StatusAccepted)
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return
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}
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w.WriteHeader(http.StatusOK)
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}),
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)
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defer pgwOK.Close()
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// Fake a Pushgateway that always responds with 500.
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pgwErr := httptest.NewServer(
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http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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http.Error(w, "fake error", http.StatusInternalServerError)
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}),
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)
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defer pgwErr.Close()
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metric1 := prometheus.NewCounter(prometheus.CounterOpts{
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Name: "testname1",
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Help: "testhelp1",
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})
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metric2 := prometheus.NewGauge(prometheus.GaugeOpts{
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Name: "testname2",
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Help: "testhelp2",
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ConstLabels: prometheus.Labels{"foo": "bar", "dings": "bums"},
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})
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reg := prometheus.NewRegistry()
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reg.MustRegister(metric1)
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reg.MustRegister(metric2)
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mfs, err := reg.Gather()
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if err != nil {
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t.Fatal(err)
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}
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buf := &bytes.Buffer{}
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enc := expfmt.NewEncoder(buf, expfmt.NewFormat(expfmt.TypeProtoDelim))
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for _, mf := range mfs {
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if err := enc.Encode(mf); err != nil {
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t.Fatal(err)
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}
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}
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wantBody := buf.Bytes()
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// Push some Collectors, all good.
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if err := New(pgwOK.URL, "testjob").
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Collector(metric1).
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Collector(metric2).
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Push(); err != nil {
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t.Fatal(err)
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}
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if lastMethod != http.MethodPut {
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t.Errorf("got method %q for Push, want %q", lastMethod, http.MethodPut)
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}
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if !bytes.Equal(lastBody, wantBody) {
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t.Errorf("got body %v, want %v", lastBody, wantBody)
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}
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if lastPath != "/metrics/job/testjob" {
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t.Error("unexpected path:", lastPath)
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}
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// Add some Collectors, with nil grouping, all good.
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if err := New(pgwOK.URL, "testjob").
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Collector(metric1).
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Collector(metric2).
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Add(); err != nil {
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t.Fatal(err)
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}
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if lastMethod != http.MethodPost {
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t.Errorf("got method %q for Add, want %q", lastMethod, http.MethodPost)
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}
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if !bytes.Equal(lastBody, wantBody) {
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t.Errorf("got body %v, want %v", lastBody, wantBody)
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}
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if lastPath != "/metrics/job/testjob" {
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t.Error("unexpected path:", lastPath)
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}
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// Pushes that require base64 encoding.
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if err := New(pgwOK.URL, "test/job").
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Collector(metric1).
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Collector(metric2).
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Push(); err != nil {
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t.Fatal(err)
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}
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if lastMethod != http.MethodPut {
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t.Errorf("got method %q for Push, want %q", lastMethod, http.MethodPut)
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}
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if !bytes.Equal(lastBody, wantBody) {
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t.Errorf("got body %v, want %v", lastBody, wantBody)
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}
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if lastPath != "/metrics/job@base64/dGVzdC9qb2I" {
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t.Error("unexpected path:", lastPath)
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}
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if err := New(pgwOK.URL, "testjob").
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Grouping("foobar", "bu/ms").
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Collector(metric1).
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Collector(metric2).
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Push(); err != nil {
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t.Fatal(err)
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}
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if lastMethod != http.MethodPut {
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t.Errorf("got method %q for Push, want %q", lastMethod, http.MethodPut)
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}
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if !bytes.Equal(lastBody, wantBody) {
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t.Errorf("got body %v, want %v", lastBody, wantBody)
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}
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if lastPath != "/metrics/job/testjob/foobar@base64/YnUvbXM" {
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t.Error("unexpected path:", lastPath)
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}
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// Push that requires URL encoding.
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if err := New(pgwOK.URL, "testjob").
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Grouping("titan", "Προμηθεύς").
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Collector(metric1).
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Collector(metric2).
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Push(); err != nil {
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t.Fatal(err)
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}
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if lastMethod != http.MethodPut {
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t.Errorf("got method %q for Push, want %q", lastMethod, http.MethodPut)
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}
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if !bytes.Equal(lastBody, wantBody) {
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t.Errorf("got body %v, want %v", lastBody, wantBody)
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}
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if lastPath != "/metrics/job/testjob/titan/%CE%A0%CF%81%CE%BF%CE%BC%CE%B7%CE%B8%CE%B5%CF%8D%CF%82" {
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t.Error("unexpected path:", lastPath)
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}
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// Empty label value triggers special base64 encoding.
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if err := New(pgwOK.URL, "testjob").
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Grouping("empty", "").
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Collector(metric1).
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Collector(metric2).
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Push(); err != nil {
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t.Fatal(err)
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}
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if lastMethod != http.MethodPut {
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t.Errorf("got method %q for Push, want %q", lastMethod, http.MethodPut)
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}
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if !bytes.Equal(lastBody, wantBody) {
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t.Errorf("got body %v, want %v", lastBody, wantBody)
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}
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if lastPath != "/metrics/job/testjob/empty@base64/=" {
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t.Error("unexpected path:", lastPath)
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}
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// Empty job name results in error.
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if err := New(pgwErr.URL, "").
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Collector(metric1).
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Collector(metric2).
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Push(); err == nil {
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t.Error("push with empty job succeeded")
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} else {
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if want := errJobEmpty; !errors.Is(err, want) {
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t.Errorf("got error %q, want %q", err, want)
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}
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}
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// Push some Collectors with a broken PGW.
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if err := New(pgwErr.URL, "testjob").
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Collector(metric1).
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Collector(metric2).
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Push(); err == nil {
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t.Error("push to broken Pushgateway succeeded")
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} else {
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if got, want := err.Error(), "unexpected status code 500 while pushing to "+pgwErr.URL+"/metrics/job/testjob: fake error\n"; got != want {
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t.Errorf("got error %q, want %q", got, want)
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}
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}
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// Push some Collectors with invalid grouping or job.
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if err := New(pgwOK.URL, "testjob").
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Grouping("foo", "bums").
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Collector(metric1).
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Collector(metric2).
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Push(); err == nil {
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t.Error("push with grouping contained in metrics succeeded")
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}
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if err := New(pgwOK.URL, "testjob").
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Grouping("foo-bar", "bums").
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Collector(metric1).
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Collector(metric2).
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Push(); err == nil {
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t.Error("push with invalid grouping succeeded")
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}
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// Push registry, all good.
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if err := New(pgwOK.URL, "testjob").
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Gatherer(reg).
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Push(); err != nil {
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t.Fatal(err)
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}
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if lastMethod != http.MethodPut {
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t.Errorf("got method %q for Push, want %q", lastMethod, http.MethodPut)
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}
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if !bytes.Equal(lastBody, wantBody) {
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t.Errorf("got body %v, want %v", lastBody, wantBody)
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}
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// Add registry, all good.
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if err := New(pgwOK.URL, "testjob").
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Grouping("a", "x").
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Grouping("b", "y").
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Gatherer(reg).
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Add(); err != nil {
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t.Fatal(err)
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}
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if lastMethod != http.MethodPost {
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t.Errorf("got method %q for Add, want %q", lastMethod, http.MethodPost)
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}
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if !bytes.Equal(lastBody, wantBody) {
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t.Errorf("got body %v, want %v", lastBody, wantBody)
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}
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if lastPath != "/metrics/job/testjob/a/x/b/y" && lastPath != "/metrics/job/testjob/b/y/a/x" {
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t.Error("unexpected path:", lastPath)
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}
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// Delete, all good.
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if err := New(pgwOK.URL, "testjob").
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Grouping("a", "x").
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Grouping("b", "y").
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Delete(); err != nil {
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t.Fatal(err)
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}
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if lastMethod != http.MethodDelete {
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t.Errorf("got method %q for Delete, want %q", lastMethod, http.MethodDelete)
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}
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if len(lastBody) != 0 {
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t.Errorf("got body of length %d, want empty body", len(lastBody))
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}
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if lastPath != "/metrics/job/testjob/a/x/b/y" && lastPath != "/metrics/job/testjob/b/y/a/x" {
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t.Error("unexpected path:", lastPath)
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}
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// Push some Collectors with custom header, all good.
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header := make(http.Header)
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header.Set("Authorization", "Bearer Token")
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if err := New(pgwOK.URL, "testjob").
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Collector(metric1).
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Collector(metric2).
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Header(header).
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Push(); err != nil {
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t.Fatal(err)
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}
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if lastMethod != http.MethodPut {
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t.Errorf("got method %q for Add, want %q", lastMethod, http.MethodPut)
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}
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if !bytes.Equal(lastBody, wantBody) {
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t.Errorf("got body %v, want %v", lastBody, wantBody)
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}
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if lastPath != "/metrics/job/testjob" {
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t.Error("unexpected path:", lastPath)
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}
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if lastHeader == nil || lastHeader.Get("Authorization") == "" {
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t.Error("empty Authorization header")
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}
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}
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