| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package file |
| 4 | |
| 5 | import ( |
| 6 | "context" |
| 7 | "os" |
| 8 | "path/filepath" |
| 9 | "sort" |
| 10 | "testing" |
| 11 | "time" |
| 12 | |
| 13 | "github.com/netdata/netdata/go/plugins/plugin/framework/confgroup" |
| 14 | |
| 15 | "github.com/stretchr/testify/assert" |
| 16 | "github.com/stretchr/testify/require" |
| 17 | "gopkg.in/yaml.v2" |
| 18 | ) |
| 19 | |
| 20 | type ( |
| 21 | discoverySim struct { |
| 22 | discovery *Discovery |
| 23 | beforeRun func() |
| 24 | afterRun func() |
| 25 | expectedGroups []*confgroup.Group |
| 26 | } |
| 27 | ) |
| 28 | |
| 29 | func (sim discoverySim) run(t *testing.T) { |
| 30 | t.Helper() |
| 31 | require.NotNil(t, sim.discovery) |
| 32 | |
| 33 | if sim.beforeRun != nil { |
| 34 | sim.beforeRun() |
| 35 | } |
| 36 | |
| 37 | in, out := make(chan []*confgroup.Group), make(chan []*confgroup.Group) |
| 38 | go sim.collectGroups(t, in, out) |
| 39 | |
| 40 | ctx, cancel := context.WithTimeout(context.Background(), time.Minute) |
| 41 | defer cancel() |
| 42 | go sim.discovery.Run(ctx, in) |
| 43 | time.Sleep(time.Millisecond * 250) |
| 44 | |
| 45 | if sim.afterRun != nil { |
| 46 | sim.afterRun() |
| 47 | } |
| 48 | |
| 49 | actual := <-out |
| 50 | |
| 51 | sortGroups(actual) |
| 52 | sortGroups(sim.expectedGroups) |
| 53 | |
| 54 | assert.Equal(t, sim.expectedGroups, actual) |
| 55 | } |
| 56 | |
| 57 | func (sim discoverySim) collectGroups(t *testing.T, in, out chan []*confgroup.Group) { |
| 58 | timeout := time.Second * 5 |
| 59 | var groups []*confgroup.Group |
| 60 | loop: |
| 61 | for { |
| 62 | select { |
| 63 | case updates := <-in: |
| 64 | if groups = append(groups, updates...); len(groups) >= len(sim.expectedGroups) { |
| 65 | break loop |
| 66 | } |
| 67 | case <-time.After(timeout): |
| 68 | t.Logf("discovery %s timed out after %s, got %d groups, expected %d, some events are skipped", |
| 69 | sim.discovery.discoverers, timeout, len(groups), len(sim.expectedGroups)) |
| 70 | break loop |
| 71 | } |
| 72 | } |
| 73 | out <- groups |
| 74 | } |
| 75 | |
| 76 | type tmpDir struct { |
| 77 | dir string |
| 78 | t *testing.T |
| 79 | } |
| 80 | |
| 81 | func newTmpDir(t *testing.T, pattern string) *tmpDir { |
| 82 | pattern = "netdata-go-test-discovery-file-" + pattern |
| 83 | dir, err := os.MkdirTemp(os.TempDir(), pattern) |
| 84 | require.NoError(t, err) |
| 85 | return &tmpDir{dir: dir, t: t} |
| 86 | } |
| 87 | |
| 88 | func (d *tmpDir) cleanup() { |
| 89 | assert.NoError(d.t, os.RemoveAll(d.dir)) |
| 90 | } |
| 91 | |
| 92 | func (d *tmpDir) join(filename string) string { |
| 93 | return filepath.Join(d.dir, filename) |
| 94 | } |
| 95 | |
| 96 | func (d *tmpDir) createFile(pattern string) string { |
| 97 | f, err := os.CreateTemp(d.dir, pattern) |
| 98 | require.NoError(d.t, err) |
| 99 | _ = f.Close() |
| 100 | return f.Name() |
| 101 | } |
| 102 | |
| 103 | func (d *tmpDir) removeFile(filename string) { |
| 104 | err := os.Remove(filename) |
| 105 | require.NoError(d.t, err) |
| 106 | } |
| 107 | |
| 108 | func (d *tmpDir) renameFile(origFilename, newFilename string) { |
| 109 | err := os.Rename(origFilename, newFilename) |
| 110 | require.NoError(d.t, err) |
| 111 | } |
| 112 | |
| 113 | func (d *tmpDir) writeYAML(filename string, in any) { |
| 114 | bs, err := yaml.Marshal(in) |
| 115 | require.NoError(d.t, err) |
| 116 | err = os.WriteFile(filename, bs, 0644) |
| 117 | require.NoError(d.t, err) |
| 118 | } |
| 119 | |
| 120 | func (d *tmpDir) writeString(filename, data string) { |
| 121 | err := os.WriteFile(filename, []byte(data), 0644) |
| 122 | require.NoError(d.t, err) |
| 123 | } |
| 124 | |
| 125 | func sortGroups(groups []*confgroup.Group) { |
| 126 | if len(groups) == 0 { |
| 127 | return |
| 128 | } |
| 129 | sort.Slice(groups, func(i, j int) bool { return groups[i].Source < groups[j].Source }) |
| 130 | } |