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// Copyright 2015 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package collector
import (
"fmt"
"github.com/go-kit/kit/log"
"io/ioutil"
"net/http"
"net/http/httptest"
"strings"
"testing"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"gopkg.in/alecthomas/kingpin.v2"
)
func TestIPVSCollector(t *testing.T) {
if _, err := kingpin.CommandLine.Parse([]string{"--path.procfs", "fixtures/proc"}); err != nil {
t.Fatal(err)
}
collector, err := newIPVSCollector(log.NewNopLogger())
if err != nil {
t.Fatal(err)
}
sink := make(chan prometheus.Metric)
go func() {
err = collector.Update(sink)
if err != nil {
panic(fmt.Sprintf("failed to update collector: %v", err))
}
}()
for expected, got := range map[string]string{
prometheus.NewDesc("node_ipvs_connections_total", "The total number of connections made.", nil, nil).String(): (<-sink).Desc().String(),
prometheus.NewDesc("node_ipvs_incoming_packets_total", "The total number of incoming packets.", nil, nil).String(): (<-sink).Desc().String(),
prometheus.NewDesc("node_ipvs_outgoing_packets_total", "The total number of outgoing packets.", nil, nil).String(): (<-sink).Desc().String(),
prometheus.NewDesc("node_ipvs_incoming_bytes_total", "The total amount of incoming data.", nil, nil).String(): (<-sink).Desc().String(),
prometheus.NewDesc("node_ipvs_outgoing_bytes_total", "The total amount of outgoing data.", nil, nil).String(): (<-sink).Desc().String(),
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(),
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(),
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(),
} {
if expected != got {
t.Fatalf("Expected '%s' but got '%s'", expected, got)
}
}
}
// mock collector
type miniCollector struct {
c Collector
}
func (c miniCollector) Collect(ch chan<- prometheus.Metric) {
c.c.Update(ch)
}
func (c miniCollector) Describe(ch chan<- *prometheus.Desc) {
prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: "fake",
Subsystem: "fake",
Name: "fake",
Help: "fake",
}).Describe(ch)
}
func TestIPVSCollectorResponse(t *testing.T) {
if _, err := kingpin.CommandLine.Parse([]string{"--path.procfs", "fixtures/proc"}); err != nil {
t.Fatal(err)
}
collector, err := NewIPVSCollector(log.NewNopLogger())
if err != nil {
t.Fatal(err)
}
prometheus.MustRegister(miniCollector{c: collector})
rw := httptest.NewRecorder()
promhttp.Handler().ServeHTTP(rw, &http.Request{})
metricsFile := "fixtures/ip_vs_result.txt"
wantMetrics, err := ioutil.ReadFile(metricsFile)
if err != nil {
t.Fatalf("unable to read input test file %s: %s", metricsFile, err)
}
wantLines := strings.Split(string(wantMetrics), "\n")
gotLines := strings.Split(string(rw.Body.String()), "\n")
gotLinesIdx := 0
// Until the Prometheus Go client library offers better testability
// (https://github.com/prometheus/client_golang/issues/58), we simply compare
// verbatim text-format metrics outputs, but ignore any lines we don't have
// in the fixture. Put differently, we are only testing that each line from
// the fixture is present, in the order given.
wantLoop:
for _, want := range wantLines {
for _, got := range gotLines[gotLinesIdx:] {
if want == got {
// this is a line we are interested in, and it is correct
continue wantLoop
} else {
gotLinesIdx++
}
}
// if this point is reached, the line we want was missing
t.Fatalf("Missing expected output line(s), first missing line is %s", want)
}
}
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