103 lines
2.6 KiB
Go
103 lines
2.6 KiB
Go
// Copyright 2020 Trey Dockendorf
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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 main
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import (
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"fmt"
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"io"
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"net/http"
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"os"
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"path/filepath"
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"runtime"
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"strings"
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"testing"
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"time"
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kingpin "github.com/alecthomas/kingpin/v2"
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"github.com/go-kit/log"
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"github.com/treydock/cgroup_exporter/collector"
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)
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const (
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address = "localhost:19306"
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)
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func TestMain(m *testing.M) {
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if _, err := kingpin.CommandLine.Parse([]string{"--config.paths=/user.slice"}); err != nil {
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os.Exit(1)
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}
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_, filename, _, _ := runtime.Caller(0)
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dir := filepath.Dir(filename)
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fixture := filepath.Join(dir, "fixtures")
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collector.CgroupRoot = &fixture
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procFixture := filepath.Join(fixture, "proc")
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collector.ProcRoot = &procFixture
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varTrue := true
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disableExporterMetrics = &varTrue
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w := log.NewSyncWriter(os.Stderr)
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logger := log.NewLogfmtLogger(w)
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go func() {
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http.Handle("/metrics", metricsHandler(logger))
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err := http.ListenAndServe(address, nil)
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if err != nil {
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os.Exit(1)
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}
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}()
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time.Sleep(1 * time.Second)
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exitVal := m.Run()
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os.Exit(exitVal)
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}
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func TestMetricsHandler(t *testing.T) {
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body, err := queryExporter()
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if err != nil {
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t.Fatalf("Unexpected error GET /metrics: %s", err.Error())
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}
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if !strings.Contains(body, "cgroup_memory_used_bytes{cgroup=\"/user.slice/user-20821.slice\"} 8.081408e+06") {
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t.Errorf("Unexpected value for cgroup_memory_used_bytes")
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}
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}
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func TestMetricsHandlerBadPath(t *testing.T) {
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cPath := "/dne"
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configPaths = &cPath
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body, err := queryExporter()
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if err != nil {
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t.Fatalf("Unexpected error GET /metrics: %s", err.Error())
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}
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if !strings.Contains(body, "cgroup_exporter_collect_error{cgroup=\"/dne\"} 1") {
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t.Errorf("Unexpected value for cgroup_memory_used_bytes")
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}
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}
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func queryExporter() (string, error) {
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resp, err := http.Get(fmt.Sprintf("http://%s/metrics", address))
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if err != nil {
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return "", err
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}
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b, err := io.ReadAll(resp.Body)
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if err != nil {
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return "", err
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}
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if err := resp.Body.Close(); err != nil {
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return "", err
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}
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if want, have := http.StatusOK, resp.StatusCode; want != have {
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return "", fmt.Errorf("want /metrics status code %d, have %d. Body:\n%s", want, have, b)
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}
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return string(b), nil
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}
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