| 1 | package rootparticipation |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "encoding/json" |
| 6 | "os" |
| 7 | "path/filepath" |
| 8 | "sync" |
| 9 | "testing" |
| 10 | ) |
| 11 | |
| 12 | type testDisk struct { |
| 13 | dir string |
| 14 | mu sync.Mutex |
| 15 | } |
| 16 | |
| 17 | func (d *testDisk) Read(n string) ([]byte, error) { return os.ReadFile(filepath.Join(d.dir, n)) } |
| 18 | func (d *testDisk) Write(n string, b []byte) error { |
| 19 | return os.WriteFile(filepath.Join(d.dir, n), b, 0600) |
| 20 | } |
| 21 | func (d *testDisk) Remove(n string) error { return os.Remove(filepath.Join(d.dir, n)) } |
| 22 | func (d *testDisk) Names() ([]string, error) { |
| 23 | es, e := os.ReadDir(d.dir) |
| 24 | var out []string |
| 25 | for _, v := range es { |
| 26 | out = append(out, v.Name()) |
| 27 | } |
| 28 | return out, e |
| 29 | } |
| 30 | func (d *testDisk) Close() error { return nil } |
| 31 | func (d *testDisk) Lock(context.Context, string) (func(), error) { |
| 32 | d.mu.Lock() |
| 33 | return d.mu.Unlock, nil |
| 34 | } |
| 35 | func censusFixture(t *testing.T) Ledger { |
| 36 | t.Helper() |
| 37 | s := &testDisk{dir: t.TempDir()} |
| 38 | b, _ := json.Marshal(Census{Schema: 1, Box: "box", Enrollment: "en", Migration: 1, Revision: 1, Complete: true, LaunchRevision: 1}) |
| 39 | if err := s.Write("census.json", b); err != nil { |
| 40 | t.Fatal(err) |
| 41 | } |
| 42 | return Ledger{State: s, Box: "box", Enrollment: "en", VerifyLaunches: func(context.Context, uint64) error { return nil }} |
| 43 | } |
| 44 | |
| 45 | func TestPlan14ExecutionUpdateExclusion(t *testing.T) { |
| 46 | for _, first := range []string{"acquisition", "update"} { |
| 47 | t.Run(first, func(t *testing.T) { |
| 48 | l := censusFixture(t) |
| 49 | entered, release := make(chan struct{}), make(chan struct{}) |
| 50 | acquire := func() error { |
| 51 | return l.Acquire(t.Context(), func() error { |
| 52 | close(entered) |
| 53 | <-release |
| 54 | return l.State.Write("shop.example.json", []byte(`{"Schema":1,"Status":"pending"}`)) |
| 55 | }) |
| 56 | } |
| 57 | update := func() error { return l.BeginUpdate(t.Context(), "update-1") } |
| 58 | var winner, loser func() error |
| 59 | if first == "acquisition" { |
| 60 | winner, loser = acquire, update |
| 61 | } else { |
| 62 | l.VerifyLaunches = func(context.Context, uint64) error { close(entered); <-release; return nil } |
| 63 | winner, loser = update, acquire |
| 64 | } |
| 65 | done := make(chan error, 1) |
| 66 | go func() { done <- winner() }() |
| 67 | <-entered |
| 68 | other := make(chan error, 1) |
| 69 | go func() { other <- loser() }() |
| 70 | // Removing every service mirror cannot change the root transaction. |
| 71 | data := t.TempDir() |
| 72 | if err := os.Mkdir(filepath.Join(data, ".hostexec"), 0700); err != nil { |
| 73 | t.Fatal(err) |
| 74 | } |
| 75 | if err := os.RemoveAll(filepath.Join(data, ".hostexec")); err != nil { |
| 76 | t.Fatal(err) |
| 77 | } |
| 78 | close(release) |
| 79 | if err := <-done; err != nil { |
| 80 | t.Fatal(err) |
| 81 | } |
| 82 | if err := <-other; err == nil { |
| 83 | t.Fatal("update and acquisition both succeeded") |
| 84 | } |
| 85 | }) |
| 86 | } |
| 87 | } |
| 88 | func TestPlan14ParticipationRequiresCompleteRootCensus(t *testing.T) { |
| 89 | l := censusFixture(t) |
| 90 | if err := l.Idle(t.Context()); err != nil { |
| 91 | t.Fatal(err) |
| 92 | } |
| 93 | if err := l.State.Remove("census.json"); err != nil { |
| 94 | t.Fatal(err) |
| 95 | } |
| 96 | if err := l.Idle(t.Context()); err == nil { |
| 97 | t.Fatal("missing root census became empty") |
| 98 | } |
| 99 | if err := l.Acquire(t.Context(), func() error { t.Fatal("unknown history acquired"); return nil }); err == nil { |
| 100 | t.Fatal("unknown history admitted") |
| 101 | } |
| 102 | } |
| 103 | |
amadan