| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "strings" |
| 5 | "testing" |
| 6 | ) |
| 7 | |
| 8 | func faultedRun(id string, injected, afterFault int, passed bool) result { |
| 9 | r := result{task: task{ID: id}, Attempt: 1, Passed: passed} |
| 10 | r.Meter = &meterUsage{Requests: 10, Injected: injected, RequestsAfterFault: afterFault} |
| 11 | return r |
| 12 | } |
| 13 | |
| 14 | func TestFaultCadenceScalesWithTheRun(t *testing.T) { |
| 15 | script, err := parseFaultScript("every:5:500") |
| 16 | if err != nil { |
| 17 | t.Fatalf("parse: %v", err) |
| 18 | } |
| 19 | for _, index := range []int{5, 10, 15} { |
| 20 | if status, ok := script.statusFor(index); !ok || status != 500 { |
| 21 | t.Fatalf("request %d = %d/%v, want an injected 500", index, status, ok) |
| 22 | } |
| 23 | } |
| 24 | for _, index := range []int{1, 4, 6, 9} { |
| 25 | if _, ok := script.statusFor(index); ok { |
| 26 | t.Fatalf("request %d must be forwarded", index) |
| 27 | } |
| 28 | } |
| 29 | } |
| 30 | |
| 31 | // An absolute index is a targeted failure; a cadence is background pressure. |
| 32 | // The targeted one must stay exactly where it was asked for. |
| 33 | func TestAbsoluteFaultWinsOverTheCadence(t *testing.T) { |
| 34 | script, err := parseFaultScript("10:429,every:5:500") |
| 35 | if err != nil { |
| 36 | t.Fatalf("parse: %v", err) |
| 37 | } |
| 38 | if status, _ := script.statusFor(10); status != 429 { |
| 39 | t.Fatalf("request 10 = %d, want the targeted 429", status) |
| 40 | } |
| 41 | if status, _ := script.statusFor(5); status != 500 { |
| 42 | t.Fatalf("request 5 = %d, want the cadence 500", status) |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | func TestFaultScriptRejectsMalformedCadence(t *testing.T) { |
| 47 | for _, bad := range []string{"every:5", "every:0:500", "every:x:500", "every:5:200"} { |
| 48 | if _, err := parseFaultScript(bad); err == nil { |
| 49 | t.Fatalf("%q must be rejected", bad) |
| 50 | } |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | func TestMeterCountsRequestsAfterAFault(t *testing.T) { |
| 55 | upstream := okUpstream() |
| 56 | script, _ := parseFaultScript("2:429") |
| 57 | m, base, stop := meterAgainst(t, upstream, script) |
| 58 | defer stop() |
| 59 | for range 4 { |
| 60 | post(t, base, "/chat/completions", `{"model":"x"}`).Body.Close() |
| 61 | } |
| 62 | got := m.snapshot() |
| 63 | if got.Injected != 1 { |
| 64 | t.Fatalf("injected = %d, want 1", got.Injected) |
| 65 | } |
| 66 | if got.RequestsAfterFault != 2 { |
| 67 | t.Fatalf("requests after fault = %d, want 2 (requests 3 and 4)", got.RequestsAfterFault) |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | func TestMeterCountsNoRequestsAfterFaultWhenTheHarnessGivesUp(t *testing.T) { |
| 72 | script, _ := parseFaultScript("2:429") |
| 73 | m, base, stop := meterAgainst(t, okUpstream(), script) |
| 74 | defer stop() |
| 75 | for range 2 { |
| 76 | post(t, base, "/chat/completions", `{"model":"x"}`).Body.Close() |
| 77 | } |
| 78 | if got := m.snapshot(); got.RequestsAfterFault != 0 { |
| 79 | t.Fatalf("requests after fault = %d, want 0 — nothing followed the failure", got.RequestsAfterFault) |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | func TestFaultRecoverySeparatesRetryingFromSolving(t *testing.T) { |
| 84 | got := renderFaultRecovery([]result{ |
| 85 | faultedRun("solved-through", 2, 5, true), |
| 86 | faultedRun("retried-but-lost", 1, 4, false), |
| 87 | faultedRun("gave-up", 1, 0, false), |
| 88 | faultedRun("never-faulted", 0, 0, true), |
| 89 | }) |
| 90 | for _, want := range []string{ |
| 91 | "**Fault recovery** (3 runs failed on purpose, 4 injections)", |
| 92 | "**retried** 67% (2)", |
| 93 | "**still solved** 33% (1/3)", |
| 94 | "in-run control 100% (1/1 never hit a fault)", |
| 95 | } { |
| 96 | if !strings.Contains(got, want) { |
| 97 | t.Fatalf("recovery line missing %q:\n%s", want, got) |
| 98 | } |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | func TestFaultRecoveryRendersNothingWithoutInjections(t *testing.T) { |
| 103 | if got := renderFaultRecovery([]result{faultedRun("clean", 0, 0, true)}); got != "" { |
| 104 | t.Fatalf("want no section when nothing was injected, got:\n%s", got) |
| 105 | } |
| 106 | } |
| 107 |