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package main
import (
"bytes"
"net/http"
"net/http/httptest"
"testing"
"time"
"github.com/digitalocean/bind_exporter/bind"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/expfmt"
)
var (
serverStatsV2 = []string{
`bind_boot_time_seconds 1.473202335e+09`,
`bind_incoming_queries_total{type="A"} 128417`,
`bind_incoming_requests_total{opcode="QUERY"} 37634`,
`bind_responses_total{result="Success"} 29313`,
`bind_query_duplicates_total 216`,
`bind_query_errors_total{error="Dropped"} 237`,
`bind_query_errors_total{error="Failure"} 2950`,
`bind_query_recursions_total 60946`,
}
serverStatsV3 = combine(serverStatsV2, []string{
`bind_config_time_seconds 1.473202712e+09`,
})
viewStats = []string{
`bind_resolver_cache_rrsets{type="A",view="_default"} 34324`,
`bind_resolver_queries_total{type="CNAME",view="_default"} 28`,
`bind_resolver_response_errors_total{error="FORMERR",view="_bind"} 0`,
`bind_resolver_response_errors_total{error="FORMERR",view="_default"} 42906`,
`bind_resolver_response_errors_total{error="NXDOMAIN",view="_bind"} 0`,
`bind_resolver_response_errors_total{error="NXDOMAIN",view="_default"} 16707`,
`bind_resolver_response_errors_total{error="OtherError",view="_bind"} 0`,
`bind_resolver_response_errors_total{error="OtherError",view="_default"} 20660`,
`bind_resolver_response_errors_total{error="SERVFAIL",view="_bind"} 0`,
`bind_resolver_response_errors_total{error="SERVFAIL",view="_default"} 7596`,
`bind_resolver_response_lame_total{view="_default"} 9108`,
`bind_resolver_query_duration_seconds_bucket{view="_default",le="0.01"} 38334`,
`bind_resolver_query_duration_seconds_bucket{view="_default",le="0.1"} 113122`,
`bind_resolver_query_duration_seconds_bucket{view="_default",le="0.5"} 182658`,
`bind_resolver_query_duration_seconds_bucket{view="_default",le="0.8"} 187375`,
`bind_resolver_query_duration_seconds_bucket{view="_default",le="1.6"} 188409`,
`bind_resolver_query_duration_seconds_bucket{view="_default",le="+Inf"} 227755`,
}
taskStats = []string{
`bind_tasks_running 8`,
`bind_worker_threads 16`,
}
)
func TestBindExporterV2Client(t *testing.T) {
bindExporterTest{
server: newV2Server(),
groups: []bind.StatisticGroup{bind.ServerStats, bind.ViewStats, bind.TaskStats},
version: "xml.v2",
include: combine([]string{`bind_up 1`}, serverStatsV2, viewStats, taskStats),
exclude: []string{`bind_config_time_seconds`},
}.run(t)
}
func TestBindExporterV3Client(t *testing.T) {
bindExporterTest{
server: newV3Server(),
groups: []bind.StatisticGroup{bind.ServerStats, bind.ViewStats, bind.TaskStats},
version: "xml.v3",
include: combine([]string{`bind_up 1`}, serverStatsV3, viewStats, taskStats),
}.run(t)
}
func TestBindExporterAutomaticClient(t *testing.T) {
for _, test := range []bindExporterTest{
{
server: newV2Server(),
groups: []bind.StatisticGroup{bind.ServerStats},
version: "auto",
include: combine([]string{`bind_up 1`}, serverStatsV2),
},
{
server: newV3Server(),
groups: []bind.StatisticGroup{bind.ServerStats},
version: "auto",
include: combine([]string{`bind_up 1`}, serverStatsV3),
},
} {
test.run(t)
}
}
func TestBindExporterStatisticGroups(t *testing.T) {
bindExporterTest{
server: newV2Server(),
groups: []bind.StatisticGroup{bind.ServerStats},
version: "xml.v2",
include: combine([]string{`bind_up 1`}, serverStatsV2),
exclude: combine(viewStats, taskStats, []string{`bind_tasks_running 0`, `bind_worker_threads 0`}),
}.run(t)
}
func TestBindExporterBindFailure(t *testing.T) {
bindExporterTest{
server: httptest.NewServer(http.HandlerFunc(http.NotFound)),
version: "xml.v2",
include: []string{`bind_up 0`},
exclude: serverStatsV2,
}.run(t)
}
type bindExporterTest struct {
server *httptest.Server
groups []bind.StatisticGroup
version string
include []string
exclude []string
}
func (b bindExporterTest) run(t *testing.T) {
defer b.server.Close()
o, err := collect(NewExporter(b.version, b.server.URL, 100*time.Millisecond, b.groups))
if err != nil {
t.Fatal(err)
}
for _, m := range b.include {
if !bytes.Contains(o, []byte(m)) {
t.Errorf("expected to find metric %q in output\n%s", m, o)
}
}
for _, m := range b.exclude {
if bytes.Contains(o, []byte(m)) {
t.Errorf("expected to not find metric %q in output\n%s", m, o)
}
}
}
func combine(s ...[]string) []string {
r := []string{}
for _, i := range s {
r = append(r, i...)
}
return r
}
func collect(c prometheus.Collector) ([]byte, error) {
r := prometheus.NewRegistry()
if err := r.Register(c); err != nil {
return nil, err
}
m, err := r.Gather()
if err != nil {
return nil, err
}
var b bytes.Buffer
enc := expfmt.NewEncoder(&b, expfmt.FmtText)
for _, f := range m {
if err := enc.Encode(f); err != nil {
return nil, err
}
}
return b.Bytes(), nil
}
func newV2Server() *httptest.Server {
return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.RequestURI == "/" {
http.ServeFile(w, r, "fixtures/v2.xml")
} else {
http.NotFound(w, r)
}
}))
}
func newV3Server() *httptest.Server {
m := map[string]string{
"/xml/v3/server": "fixtures/v3/server",
"/xml/v3/status": "fixtures/v3/status",
"/xml/v3/tasks": "fixtures/v3/tasks",
}
return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if f, ok := m[r.RequestURI]; ok {
http.ServeFile(w, r, f)
} else {
http.NotFound(w, r)
}
}))
}
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