| 1 | package edge |
| 2 | |
| 3 | import ( |
| 4 | "net/http" |
| 5 | "path/filepath" |
| 6 | "sync/atomic" |
| 7 | "testing" |
| 8 | |
| 9 | "github.com/carlosframework/platform/internal/registry" |
| 10 | ) |
| 11 | |
| 12 | // genActivator is an Activator that is also a GenSource: an instant wake |
| 13 | // that proxies straight through, over a hand-driven fakeGens. served counts |
| 14 | // the requests that reached it, so a test can tell a cache hit (none) from |
| 15 | // a proxied request. |
| 16 | type genActivator struct { |
| 17 | *fakeGens |
| 18 | served atomic.Int64 |
| 19 | } |
| 20 | |
| 21 | func (a *genActivator) ServeHTTP(w http.ResponseWriter, r *http.Request, _ registry.Route, proxy http.Handler) bool { |
| 22 | a.served.Add(1) |
| 23 | proxy.ServeHTTP(w, r) |
| 24 | return true |
| 25 | } |
| 26 | |
| 27 | func (a *genActivator) RetireExcept(map[string]bool) {} |
| 28 | |
| 29 | // genFixture is a registry with one activator-managed instance whose |
| 30 | // CANONICAL socket is served by an app answering "canonical", and a |
| 31 | // generation-1 app answering "A". Which one a request reaches says which |
| 32 | // path the edge took. |
| 33 | func genFixture(t *testing.T, on bool, hibernate bool) (*Edge, *genActivator, *genApp) { |
| 34 | t.Helper() |
| 35 | dir := genSockDir(t) |
| 36 | startGenApp(t, filepath.Join(dir, "canon.sock"), body("canonical", "")) |
| 37 | a := startGenApp(t, filepath.Join(dir, "a.sock"), body("A", "")) |
| 38 | reg := openReg(t) |
| 39 | if err := reg.Upsert(registry.Route{Host: "inst.example.com", Kind: "instance", Hibernate: hibernate, |
| 40 | Socket: filepath.Join(dir, "canon.sock"), Status: "ready", Version: "v0"}); err != nil { |
| 41 | t.Fatal(err) |
| 42 | } |
| 43 | act := &genActivator{fakeGens: newFakeGens(on)} |
| 44 | act.switchTo("inst.example.com", GenInfo{Socket: a.sock, N: 1, Build: "v1"}) |
| 45 | e, err := New(reg, act) |
| 46 | if err != nil { |
| 47 | t.Fatalf("New: %v", err) |
| 48 | } |
| 49 | return e, act, a |
| 50 | } |
| 51 | |
| 52 | func TestManagedRouteDialsTheCurrentGeneration(t *testing.T) { |
| 53 | e, act, _ := genFixture(t, true, true) |
| 54 | rec := serve(t, e, "http://inst.example.com/") |
| 55 | if rec.Body.String() != "A" { |
| 56 | t.Fatalf("body %q, want A: the edge dialled the canonical socket, not the current generation", rec.Body.String()) |
| 57 | } |
| 58 | if got := rec.Header().Get("X-Carlos-Version"); got != "v1" { |
| 59 | t.Fatalf("X-Carlos-Version = %q, want v1, the serving generation's build, not the row's v0", got) |
| 60 | } |
| 61 | if !e.current()["inst.example.com"].genManaged { |
| 62 | t.Fatal("the managed route's upstream is not marked genManaged") |
| 63 | } |
| 64 | if len(act.retired) != 1 { |
| 65 | t.Fatalf("New registered %d retire hooks, want 1 (the edge's pools)", len(act.retired)) |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | // Flag off: byte for byte the old edge. unixProxy on the canonical socket, |
| 70 | // the row's version, no retire hook, no pools. |
| 71 | func TestGenerationsOffKeepsTheCanonicalProxyAndTheRowVersion(t *testing.T) { |
| 72 | e, act, _ := genFixture(t, false, true) |
| 73 | rec := serve(t, e, "http://inst.example.com/") |
| 74 | if rec.Body.String() != "canonical" || rec.Header().Get("X-Carlos-Version") != "v0" { |
| 75 | t.Fatalf("got %q version %q, want canonical v0", rec.Body.String(), rec.Header().Get("X-Carlos-Version")) |
| 76 | } |
| 77 | if e.gens != nil || e.genPools != nil || len(act.retired) != 0 { |
| 78 | t.Fatal("generations were wired with the switch off") |
| 79 | } |
| 80 | up := e.current()["inst.example.com"] |
| 81 | if up.genManaged { |
| 82 | t.Fatal("upstream marked genManaged with the switch off") |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | // An unflagged socket route is an externally supervised process: canonical, |
| 87 | // whatever the switch says. |
| 88 | func TestUnmanagedSocketRouteStaysCanonicalWithGenerationsOn(t *testing.T) { |
| 89 | e, _, _ := genFixture(t, true, false) |
| 90 | rec := serve(t, e, "http://inst.example.com/") |
| 91 | if rec.Body.String() != "canonical" || rec.Header().Get("X-Carlos-Version") != "v0" { |
| 92 | t.Fatalf("got %q version %q, want canonical v0", rec.Body.String(), rec.Header().Get("X-Carlos-Version")) |
| 93 | } |
| 94 | up := e.current()["inst.example.com"] |
| 95 | if up.genManaged { |
| 96 | t.Fatal("an unflagged route was marked genManaged") |
| 97 | } |
| 98 | } |
| 99 | |
amadan