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// SPDX-License-Identifier: GPL-3.0-or-later
package file
import (
"context"
"os"
"path/filepath"
"sort"
"testing"
"time"
"github.com/netdata/netdata/go/go.d.plugin/agent/confgroup"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"gopkg.in/yaml.v2"
)
type (
discoverySim struct {
discovery *Discovery
beforeRun func()
afterRun func()
expectedGroups []*confgroup.Group
}
)
func (sim discoverySim) run(t *testing.T) {
t.Helper()
require.NotNil(t, sim.discovery)
if sim.beforeRun != nil {
sim.beforeRun()
}
in, out := make(chan []*confgroup.Group), make(chan []*confgroup.Group)
go sim.collectGroups(t, in, out)
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
defer cancel()
go sim.discovery.Run(ctx, in)
time.Sleep(time.Millisecond * 250)
if sim.afterRun != nil {
sim.afterRun()
}
actual := <-out
sortGroups(actual)
sortGroups(sim.expectedGroups)
assert.Equal(t, sim.expectedGroups, actual)
}
func (sim discoverySim) collectGroups(t *testing.T, in, out chan []*confgroup.Group) {
timeout := time.Second * 5
var groups []*confgroup.Group
loop:
for {
select {
case updates := <-in:
if groups = append(groups, updates...); len(groups) >= len(sim.expectedGroups) {
break loop
}
case <-time.After(timeout):
t.Logf("discovery %s timed out after %s, got %d groups, expected %d, some events are skipped",
sim.discovery.discoverers, timeout, len(groups), len(sim.expectedGroups))
break loop
}
}
out <- groups
}
type tmpDir struct {
dir string
t *testing.T
}
func newTmpDir(t *testing.T, pattern string) *tmpDir {
pattern = "netdata-go-test-discovery-file-" + pattern
dir, err := os.MkdirTemp(os.TempDir(), pattern)
require.NoError(t, err)
return &tmpDir{dir: dir, t: t}
}
func (d *tmpDir) cleanup() {
assert.NoError(d.t, os.RemoveAll(d.dir))
}
func (d *tmpDir) join(filename string) string {
return filepath.Join(d.dir, filename)
}
func (d *tmpDir) createFile(pattern string) string {
f, err := os.CreateTemp(d.dir, pattern)
require.NoError(d.t, err)
_ = f.Close()
return f.Name()
}
func (d *tmpDir) removeFile(filename string) {
err := os.Remove(filename)
require.NoError(d.t, err)
}
func (d *tmpDir) renameFile(origFilename, newFilename string) {
err := os.Rename(origFilename, newFilename)
require.NoError(d.t, err)
}
func (d *tmpDir) writeYAML(filename string, in interface{}) {
bs, err := yaml.Marshal(in)
require.NoError(d.t, err)
err = os.WriteFile(filename, bs, 0644)
require.NoError(d.t, err)
}
func (d *tmpDir) writeString(filename, data string) {
err := os.WriteFile(filename, []byte(data), 0644)
require.NoError(d.t, err)
}
func sortGroups(groups []*confgroup.Group) {
if len(groups) == 0 {
return
}
sort.Slice(groups, func(i, j int) bool { return groups[i].Source < groups[j].Source })
}
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