| 1 | package host |
| 2 | |
| 3 | import ( |
| 4 | "errors" |
| 5 | "os" |
| 6 | "path/filepath" |
| 7 | "testing" |
| 8 | |
| 9 | "github.com/carlosframework/platform/internal/hostbox" |
| 10 | "github.com/carlosframework/platform/internal/provision" |
| 11 | "github.com/carlosframework/platform/internal/registry" |
| 12 | ) |
| 13 | |
| 14 | // flatClaimEnvFile is a test's env file resolver: every host's env file |
| 15 | // flat under dir, as the fixtures that predate the row's layout place it. |
| 16 | func flatClaimEnvFile(dir string) func(host, dbPath string) (claimEnvFile, error) { |
| 17 | return func(host, _ string) (claimEnvFile, error) { return claimEnvFile{Dir: dir, Name: host + ".env"}, nil } |
| 18 | } |
| 19 | |
| 20 | // envFileOf adapts a moves FilesDir to the provider's resolver: the env |
| 21 | // path it names, flat. |
| 22 | func envFileOf(filesDir func(string) (string, string)) func(host, dbPath string) (claimEnvFile, error) { |
| 23 | return func(host, _ string) (claimEnvFile, error) { |
| 24 | _, env := filesDir(host) |
| 25 | return claimEnvFile{Dir: filepath.Dir(env), Name: filepath.Base(env)}, nil |
| 26 | } |
| 27 | } |
| 28 | |
| 29 | // testClaimRoutes is a registry's rows by host; err answers every read. |
| 30 | type testClaimRoutes struct { |
| 31 | rows map[string]registry.Route |
| 32 | err error |
| 33 | } |
| 34 | |
| 35 | func (r testClaimRoutes) Get(host string) (*registry.Route, error) { |
| 36 | if r.err != nil { |
| 37 | return nil, r.err |
| 38 | } |
| 39 | rt, ok := r.rows[host] |
| 40 | if !ok { |
| 41 | return nil, nil |
| 42 | } |
| 43 | return &rt, nil |
| 44 | } |
| 45 | |
| 46 | func (r testClaimRoutes) List() ([]registry.Route, error) { |
| 47 | if r.err != nil { |
| 48 | return nil, r.err |
| 49 | } |
| 50 | var out []registry.Route |
| 51 | for _, rt := range r.rows { |
| 52 | out = append(out, rt) |
| 53 | } |
| 54 | return out, nil |
| 55 | } |
| 56 | |
| 57 | // Merge round 6, finding 2: the provider finds a host's env file through |
| 58 | // its row, as the launch source does. A nested row's is in its instance |
| 59 | // directory, a flat or foreign row's is flat; no row, a row that cannot be |
| 60 | // read, a row that is not the wake's, and a layout migration in flight |
| 61 | // each refuse, never a guess at the flat path. |
| 62 | func TestClaimEnvFileFollowsTheRowsLayout(t *testing.T) { |
| 63 | dataDir := t.TempDir() |
| 64 | const host = "shop.example.com" |
| 65 | nested := registry.Route{Host: host, Kind: "instance", Hibernate: true, DBPath: provision.NestedDBPath(dataDir, host), Socket: provision.NestedSocket(host)} |
| 66 | flat := registry.Route{Host: host, Kind: "instance", Hibernate: true, DBPath: provision.DefaultDBPath(dataDir, host), Socket: filepath.Join(provision.SocketDir, host+".sock")} |
| 67 | foreign := registry.Route{Host: host, Kind: "instance", Hibernate: true, DBPath: filepath.Join(dataDir, "elsewhere", host+".db"), Socket: "/run/other.sock"} |
| 68 | resolve := func(rt registry.Route) func(string, string) (claimEnvFile, error) { |
| 69 | return claimEnvFileFor(dataDir, testClaimRoutes{rows: map[string]registry.Route{host: rt}}) |
| 70 | } |
| 71 | got, err := resolve(nested)(host, nested.DBPath) |
| 72 | if err != nil || got != (claimEnvFile{Dir: provision.InstanceDir(dataDir, host), Name: host + ".env", Nested: true}) { |
| 73 | t.Fatalf("nested: %+v %v", got, err) |
| 74 | } |
| 75 | for name, rt := range map[string]registry.Route{"flat": flat, "foreign": foreign} { |
| 76 | got, err := resolve(rt)(host, rt.DBPath) |
| 77 | if err != nil || got != (claimEnvFile{Dir: dataDir, Name: host + ".env"}) { |
| 78 | t.Fatalf("%s: %+v %v", name, got, err) |
| 79 | } |
| 80 | } |
| 81 | // The wake's row must be the row: another database path is a row that |
| 82 | // moved since the wake selected it. |
| 83 | if _, err := resolve(nested)(host, flat.DBPath); !errors.Is(err, hostbox.ErrChanged) { |
| 84 | t.Fatalf("a row that moved: %v", err) |
| 85 | } |
| 86 | if _, err := resolve(nested)(host, ""); !errors.Is(err, hostbox.ErrChanged) { |
| 87 | t.Fatalf("no database path: %v", err) |
| 88 | } |
| 89 | if _, err := claimEnvFileFor(dataDir, testClaimRoutes{})(host, nested.DBPath); !errors.Is(err, hostbox.ErrChanged) { |
| 90 | t.Fatalf("no row: %v", err) |
| 91 | } |
| 92 | unreadable := errors.New("registry: disk I/O error") |
| 93 | if _, err := claimEnvFileFor(dataDir, testClaimRoutes{err: unreadable})(host, nested.DBPath); !errors.Is(err, unreadable) { |
| 94 | t.Fatalf("an unreadable registry: %v", err) |
| 95 | } |
| 96 | // A layout migration in flight: the env file may be at either path. |
| 97 | journal := provision.LayoutJournalPath(dataDir, host) |
| 98 | if err := os.MkdirAll(filepath.Dir(journal), 0o700); err != nil { |
| 99 | t.Fatal(err) |
| 100 | } |
| 101 | if err := os.WriteFile(journal, []byte("{}"), 0o600); err != nil { |
| 102 | t.Fatal(err) |
| 103 | } |
| 104 | for name, rt := range map[string]registry.Route{"nested": nested, "flat": flat} { |
| 105 | if _, err := resolve(rt)(host, rt.DBPath); !errors.Is(err, hostbox.ErrChanged) { |
| 106 | t.Fatalf("%s under a layout journal: %v", name, err) |
| 107 | } |
| 108 | } |
| 109 | } |
| 110 | |
amadan