177 lines
5.1 KiB
Go
177 lines
5.1 KiB
Go
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// 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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// Copyright (c) 2013, The Prometheus Authors
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// All rights reserved.
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//
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// Use of this source code is governed by a BSD-style license that can be found
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// in the LICENSE file.
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package push
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import (
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"bytes"
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"io/ioutil"
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"net/http"
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"net/http/httptest"
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"os"
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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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)
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host, err := os.Hostname()
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if err != nil {
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t.Error(err)
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}
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// Fake a Pushgateway that always responds with 202.
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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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var err error
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lastBody, err = ioutil.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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w.WriteHeader(http.StatusAccepted)
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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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prometheus.MustRegisterWith(reg, metric1)
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prometheus.MustRegisterWith(reg, metric2)
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mfs, err := reg.Collect()
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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.FmtProtoDelim)
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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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// PushCollectors, all good.
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if err := Collectors("testjob", HostnameGroupingKey(), pgwOK.URL, metric1, metric2); err != nil {
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t.Fatal(err)
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}
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if lastMethod != "PUT" {
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t.Error("want method PUT for PushCollectors, got", lastMethod)
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}
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if bytes.Compare(lastBody, wantBody) != 0 {
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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/instance/"+host {
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t.Error("unexpected path:", lastPath)
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}
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// PushAddCollectors, with nil grouping, all good.
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if err := AddCollectors("testjob", nil, pgwOK.URL, metric1, metric2); err != nil {
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t.Fatal(err)
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}
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if lastMethod != "POST" {
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t.Error("want method POST for PushAddCollectors, got", lastMethod)
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}
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if bytes.Compare(lastBody, wantBody) != 0 {
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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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// PushCollectors with a broken PGW.
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if err := Collectors("testjob", nil, pgwErr.URL, metric1, metric2); 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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// PushCollectors with invalid grouping or job.
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if err := Collectors("testjob", map[string]string{"foo": "bums"}, pgwErr.URL, metric1, metric2); 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 := Collectors("test/job", nil, pgwErr.URL, metric1, metric2); err == nil {
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t.Error("push with invalid job value succeeded")
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}
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if err := Collectors("testjob", map[string]string{"foo/bar": "bums"}, pgwErr.URL, metric1, metric2); err == nil {
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t.Error("push with invalid grouping succeeded")
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}
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if err := Collectors("testjob", map[string]string{"foo-bar": "bums"}, pgwErr.URL, metric1, metric2); 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 := Registry(reg, "testjob", HostnameGroupingKey(), pgwOK.URL); err != nil {
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t.Fatal(err)
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}
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if lastMethod != "PUT" {
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t.Error("want method PUT for Push, got", lastMethod)
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}
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if bytes.Compare(lastBody, wantBody) != 0 {
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t.Errorf("got body %v, want %v", lastBody, wantBody)
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}
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// PushAdd registry, all good.
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if err := RegistryAdd(reg, "testjob", map[string]string{"a": "x", "b": "y"}, pgwOK.URL); err != nil {
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t.Fatal(err)
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}
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if lastMethod != "POST" {
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t.Error("want method POSTT for PushAdd, got", lastMethod)
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}
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if bytes.Compare(lastBody, wantBody) != 0 {
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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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}
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