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120 lines
5.2 KiB
120 lines
5.2 KiB
// Copyright 2015 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 collector
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import (
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"fmt"
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"io/ioutil"
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"net/http"
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"net/http/httptest"
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"strings"
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"testing"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"gopkg.in/alecthomas/kingpin.v2"
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)
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func TestIPVSCollector(t *testing.T) {
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if _, err := kingpin.CommandLine.Parse([]string{"--path.procfs", "fixtures/proc"}); err != nil {
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t.Fatal(err)
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}
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collector, err := newIPVSCollector()
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if err != nil {
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t.Fatal(err)
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}
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sink := make(chan prometheus.Metric)
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go func() {
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err = collector.Update(sink)
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if err != nil {
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panic(fmt.Sprintf("failed to update collector: %v", err))
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}
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}()
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for expected, got := range map[string]string{
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prometheus.NewDesc("node_ipvs_connections_total", "The total number of connections made.", nil, nil).String(): (<-sink).Desc().String(),
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prometheus.NewDesc("node_ipvs_incoming_packets_total", "The total number of incoming packets.", nil, nil).String(): (<-sink).Desc().String(),
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prometheus.NewDesc("node_ipvs_outgoing_packets_total", "The total number of outgoing packets.", nil, nil).String(): (<-sink).Desc().String(),
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prometheus.NewDesc("node_ipvs_incoming_bytes_total", "The total amount of incoming data.", nil, nil).String(): (<-sink).Desc().String(),
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prometheus.NewDesc("node_ipvs_outgoing_bytes_total", "The total amount of outgoing data.", nil, nil).String(): (<-sink).Desc().String(),
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prometheus.NewDesc("node_ipvs_backend_connections_active", "The current active connections by local and remote address.", []string{"local_address", "local_port", "remote_address", "remote_port", "proto", "local_mark"}, nil).String(): (<-sink).Desc().String(),
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prometheus.NewDesc("node_ipvs_backend_connections_inactive", "The current inactive connections by local and remote address.", []string{"local_address", "local_port", "remote_address", "remote_port", "proto", "local_mark"}, nil).String(): (<-sink).Desc().String(),
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prometheus.NewDesc("node_ipvs_backend_weight", "The current backend weight by local and remote address.", []string{"local_address", "local_port", "remote_address", "remote_port", "proto", "local_mark"}, nil).String(): (<-sink).Desc().String(),
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} {
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if expected != got {
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t.Fatalf("Expected '%s' but got '%s'", expected, got)
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}
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}
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}
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// mock collector
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type miniCollector struct {
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c Collector
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}
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func (c miniCollector) Collect(ch chan<- prometheus.Metric) {
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c.c.Update(ch)
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}
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func (c miniCollector) Describe(ch chan<- *prometheus.Desc) {
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prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "fake",
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Subsystem: "fake",
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Name: "fake",
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Help: "fake",
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}).Describe(ch)
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}
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func TestIPVSCollectorResponse(t *testing.T) {
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if _, err := kingpin.CommandLine.Parse([]string{"--path.procfs", "fixtures/proc"}); err != nil {
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t.Fatal(err)
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}
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collector, err := NewIPVSCollector()
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if err != nil {
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t.Fatal(err)
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}
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prometheus.MustRegister(miniCollector{c: collector})
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rw := httptest.NewRecorder()
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promhttp.Handler().ServeHTTP(rw, &http.Request{})
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metricsFile := "fixtures/ip_vs_result.txt"
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wantMetrics, err := ioutil.ReadFile(metricsFile)
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if err != nil {
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t.Fatalf("unable to read input test file %s: %s", metricsFile, err)
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}
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wantLines := strings.Split(string(wantMetrics), "\n")
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gotLines := strings.Split(string(rw.Body.String()), "\n")
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gotLinesIdx := 0
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// Until the Prometheus Go client library offers better testability
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// (https://github.com/prometheus/client_golang/issues/58), we simply compare
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// verbatim text-format metrics outputs, but ignore any lines we don't have
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// in the fixture. Put differently, we are only testing that each line from
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// the fixture is present, in the order given.
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wantLoop:
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for _, want := range wantLines {
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for _, got := range gotLines[gotLinesIdx:] {
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if want == got {
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// this is a line we are interested in, and it is correct
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continue wantLoop
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} else {
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gotLinesIdx++
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}
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}
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// if this point is reached, the line we want was missing
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t.Fatalf("Missing expected output line(s), first missing line is %s", want)
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}
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}
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