| 1 | package host |
| 2 | |
| 3 | import ( |
| 4 | "bytes" |
| 5 | "context" |
| 6 | "encoding/json" |
| 7 | "errors" |
| 8 | "log" |
| 9 | "strings" |
| 10 | "testing" |
| 11 | |
| 12 | "github.com/carlosframework/platform/internal/alerting" |
| 13 | ) |
| 14 | |
| 15 | // TestPageOperatorUsesTheArmedSinks: the paging primitive goes out through |
| 16 | // the same webhook (and SNS topic) the agent's alerts use, its failures are |
| 17 | // counted where the alert failures are, and the package function pages on |
| 18 | // whatever the metrics loop armed. With no sinks it returns nil and says so |
| 19 | // once. |
| 20 | func TestPageOperatorUsesTheArmedSinks(t *testing.T) { |
| 21 | type page struct{ Kind, Level, Subject, Body string } |
| 22 | var pages []page |
| 23 | var fail error |
| 24 | post := func(url string, body []byte) error { |
| 25 | var p page |
| 26 | if err := json.Unmarshal(body, &p); err != nil { |
| 27 | t.Fatalf("webhook body %s: %v", body, err) |
| 28 | } |
| 29 | if url != "http://example.test/hook" { |
| 30 | t.Fatalf("posted to %s", url) |
| 31 | } |
| 32 | pages = append(pages, p) |
| 33 | return fail |
| 34 | } |
| 35 | counts := &alertCounters{} |
| 36 | pub := &fakeSNS{} |
| 37 | sinks := newAlertSinks("http://example.test/hook", post, testTopicARN, pub, counts) |
| 38 | ctx := context.Background() |
| 39 | |
| 40 | if err := sinks.PageOperator(ctx, alerting.LevelIncident, "carlos move stuck: shop.example", "the body"); err != nil { |
| 41 | t.Fatal(err) |
| 42 | } |
| 43 | want := page{"page", "incident", "carlos move stuck: shop.example", "the body"} |
| 44 | if len(pages) != 1 || pages[0] != want { |
| 45 | t.Fatalf("pages %+v, want %+v", pages, want) |
| 46 | } |
| 47 | if len(pub.in) != 1 || deref(pub.in[0].Subject) != want.Subject || deref(pub.in[0].Message) != want.Body { |
| 48 | t.Fatalf("sns: %+v", pub.in) |
| 49 | } |
| 50 | |
| 51 | // The package function pages on the armed sinks. |
| 52 | armPaging(sinks) |
| 53 | t.Cleanup(func() { armPaging(nil) }) |
| 54 | if err := PageOperator(ctx, alerting.LevelWarning, "second", "body two"); err != nil { |
| 55 | t.Fatal(err) |
| 56 | } |
| 57 | if len(pages) != 2 || pages[1].Subject != "second" || pages[1].Level != "warning" { |
| 58 | t.Fatalf("pages %+v", pages) |
| 59 | } |
| 60 | |
| 61 | // A failed send is returned and counted with the alert failures. |
| 62 | fail = errors.New("boom") |
| 63 | if err := PageOperator(ctx, alerting.LevelIncident, "third", "body"); err == nil { |
| 64 | t.Fatal("a failed webhook post returned nil") |
| 65 | } |
| 66 | if counts.webhook.Load() != 1 || counts.sns.Load() != 0 { |
| 67 | t.Fatalf("failures webhook=%d sns=%d", counts.webhook.Load(), counts.sns.Load()) |
| 68 | } |
| 69 | |
| 70 | // No sinks: nil, and one line in the journal however often it is asked. |
| 71 | var buf bytes.Buffer |
| 72 | prev := log.Writer() |
| 73 | log.SetOutput(&buf) |
| 74 | t.Cleanup(func() { log.SetOutput(prev) }) |
| 75 | armPaging(nil) |
| 76 | var none *alertSinks |
| 77 | for range 2 { |
| 78 | if err := PageOperator(ctx, alerting.LevelIncident, "s", "b"); err != nil { |
| 79 | t.Fatal(err) |
| 80 | } |
| 81 | if err := none.PageOperator(ctx, alerting.LevelIncident, "s", "b"); err != nil { |
| 82 | t.Fatal(err) |
| 83 | } |
| 84 | } |
| 85 | if n := strings.Count(buf.String(), "no sink configured"); n != 1 { |
| 86 | t.Fatalf("no-sink notice logged %d times, want once:\n%s", n, buf.String()) |
| 87 | } |
| 88 | if len(pages) != 3 { |
| 89 | t.Fatalf("an unarmed page reached the old sinks: %+v", pages) |
| 90 | } |
| 91 | } |
| 92 | |
amadan