| 1 | package genselect |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "errors" |
| 6 | "fmt" |
| 7 | "testing" |
| 8 | |
| 9 | "github.com/carlosframework/platform/internal/hostclaim" |
| 10 | ) |
| 11 | |
| 12 | // GenerationMax is the loss boundary of one generation in a restore |
| 13 | // (platform-1e's ruling on #236): the highest TXID of that exact generation |
| 14 | // among the restore plan's selected files. It never lists the bucket; a |
| 15 | // generation the plan does not contain is 0, every write in it lost. |
| 16 | func TestGenerationMax(t *testing.T) { |
| 17 | ctx := context.Background() |
| 18 | t.Run("the plan's own generation is Select's maximum", func(t *testing.T) { |
| 19 | f := newFixture(t) |
| 20 | f.file("g0", 1, 1, 14) |
| 21 | f.file("g0", 0, 12, 14) |
| 22 | plan, err := Select(ctx, f.store, f.req) |
| 23 | if err != nil { |
| 24 | t.Fatal(err) |
| 25 | } |
| 26 | got, err := GenerationMax(plan, f.req.Holder.Location, "g0") |
| 27 | if err != nil || got != 14 || got != plan.MaxTXID { |
| 28 | t.Fatalf("GenerationMax %d %v, Select %d", got, err, plan.MaxTXID) |
| 29 | } |
| 30 | if got, err := GenerationMax(plan, f.req.Holder.Location+"/", "g0"); err != nil || got != 14 { |
| 31 | t.Fatalf("a trailing slash: %d %v", got, err) |
| 32 | } |
| 33 | }) |
| 34 | t.Run("a generation the plan does not contain is 0", func(t *testing.T) { |
| 35 | f := newFixture(t) |
| 36 | f.file("g1", 0, 1, 99) // in the bucket, not in the restore |
| 37 | plan, err := Select(ctx, f.store, f.req) |
| 38 | if err != nil { |
| 39 | t.Fatal(err) |
| 40 | } |
| 41 | for _, gen := range []string{"g1", "t2", hostclaim.RootGeneration, ""} { |
| 42 | if got, err := GenerationMax(plan, f.req.Holder.Location, gen); err != nil || got != 0 { |
| 43 | t.Fatalf("%q: %d %v", gen, got, err) |
| 44 | } |
| 45 | } |
| 46 | }) |
| 47 | t.Run("never a fresh listing", func(t *testing.T) { |
| 48 | f := newFixture(t) |
| 49 | plan, err := Select(ctx, f.store, f.req) |
| 50 | if err != nil { |
| 51 | t.Fatal(err) |
| 52 | } |
| 53 | f.file("g0", 0, 12, 40) // written after the selection |
| 54 | if got, err := GenerationMax(plan, f.req.Holder.Location, "g0"); err != nil || got != 11 { |
| 55 | t.Fatalf("%d %v", got, err) |
| 56 | } |
| 57 | }) |
| 58 | t.Run("the legacy root spelling", func(t *testing.T) { |
| 59 | f := newFixture(t) |
| 60 | f.origin() |
| 61 | f.file(hostclaim.RootGeneration, 9, 1, 7) |
| 62 | f.file(hostclaim.RootGeneration, 0, 8, 8) |
| 63 | plan, err := Select(ctx, f.store, f.req) |
| 64 | if err != nil { |
| 65 | t.Fatal(err) |
| 66 | } |
| 67 | if plan.Generation != hostclaim.RootGeneration { |
| 68 | t.Fatalf("selected %q", plan.Generation) |
| 69 | } |
| 70 | for _, gen := range []string{hostclaim.RootGeneration, ""} { |
| 71 | if got, err := GenerationMax(plan, f.req.Holder.Location, gen); err != nil || got != 8 { |
| 72 | t.Fatalf("%q: %d %v", gen, got, err) |
| 73 | } |
| 74 | } |
| 75 | if got, err := GenerationMax(plan, f.req.Holder.Location, "g0"); err != nil || got != 0 { |
| 76 | t.Fatalf("a named generation under the origin: %d %v", got, err) |
| 77 | } |
| 78 | }) |
| 79 | t.Run("a selected historical pinned version counts", func(t *testing.T) { |
| 80 | f := newFixture(t) |
| 81 | for _, key := range []string{f.pin.Key, f.req.Holder.Location + "/g-g0/0000/" + ltxName(11, 11)} { |
| 82 | f.b.BareDelete("data", key) |
| 83 | } |
| 84 | plan, err := Select(ctx, f.store, f.req) |
| 85 | if err != nil { |
| 86 | t.Fatal(err) |
| 87 | } |
| 88 | if plan.Root == nil || plan.Root.VersionID != f.pin.VersionID || plan.MaxTXID != 11 { |
| 89 | t.Fatalf("the selection is not the pinned historical root: %+v", plan) |
| 90 | } |
| 91 | if got, err := GenerationMax(plan, f.req.Holder.Location, "g0"); err != nil || got != 11 { |
| 92 | t.Fatalf("%d %v", got, err) |
| 93 | } |
| 94 | }) |
| 95 | t.Run("refusals", func(t *testing.T) { |
| 96 | f := newFixture(t) |
| 97 | plan, err := Select(ctx, f.store, f.req) |
| 98 | if err != nil { |
| 99 | t.Fatal(err) |
| 100 | } |
| 101 | if _, err := GenerationMax(nil, f.req.Holder.Location, "g0"); !errors.Is(err, ErrInput) { |
| 102 | t.Fatalf("no plan: %v", err) |
| 103 | } |
| 104 | for name, in := range map[string][2]string{ |
| 105 | "no location": {"", "g0"}, |
| 106 | "a climbing path": {"instances/../h", "g0"}, |
| 107 | "a nested gen": {f.req.Holder.Location, "g0/x"}, |
| 108 | "a dot generation": {f.req.Holder.Location, ".."}, |
| 109 | "an absolute path": {"/instances/h", "g0"}, |
| 110 | "an empty element": {"instances//h", "g0"}, |
| 111 | "a trailing double": {"instances/h//", "g0"}, |
| 112 | } { |
| 113 | if _, err := GenerationMax(plan, in[0], in[1]); !errors.Is(err, ErrInput) { |
| 114 | t.Fatalf("%s: %v", name, err) |
| 115 | } |
| 116 | } |
| 117 | lying := *plan |
| 118 | lying.Files = append([]File(nil), plan.Files...) |
| 119 | lying.Files[0].MaxTXID = 99 |
| 120 | if _, err := GenerationMax(&lying, f.req.Holder.Location, "g0"); !errors.Is(err, ErrInput) { |
| 121 | t.Fatalf("a file whose coordinates are not its key's: %v", err) |
| 122 | } |
| 123 | }) |
| 124 | } |
| 125 | |
| 126 | func ltxName(min, max uint64) string { return fmt.Sprintf("%016x-%016x.ltx", min, max) } |
| 127 | |
amadan