566ae22e
test: end-to-end save-to-stamp integration
a73x 2026-04-29 06:01
Commit message
cmd/filewatch-mcp/integration_test.go
| Old | New | ||
|---|---|---|---|
| @@ -0,0 +1,101 @@ | |||
| 1 | package main | ||
| 2 | |||
| 3 | import ( | ||
| 4 | "bufio" | ||
| 5 | "encoding/json" | ||
| 6 | "fmt" | ||
| 7 | "os" | ||
| 8 | "os/exec" | ||
| 9 | "path/filepath" | ||
| 10 | "strings" | ||
| 11 | "testing" | ||
| 12 | "time" | ||
| 13 | ) | ||
| 14 | |||
| 15 | // TestEndToEnd boots the binary as a subprocess, simulates a save, and | ||
| 16 | // verifies a notifications/claude/channel frame appears on stdout AND the | ||
| 17 | // file gets rewritten with [fw-XXXXXXXX]. | ||
| 18 | func TestEndToEnd(t *testing.T) { | ||
| 19 | if testing.Short() { | ||
| 20 | t.Skip("integration") | ||
| 21 | } | ||
| 22 | if _, err := exec.LookPath("go"); err != nil { | ||
| 23 | t.Skip("go toolchain not on PATH") | ||
| 24 | } | ||
| 25 | |||
| 26 | dir := t.TempDir() | ||
| 27 | target := filepath.Join(dir, "foo.go") | ||
| 28 | if err := os.WriteFile(target, []byte("package foo\n"), 0o644); err != nil { | ||
| 29 | t.Fatal(err) | ||
| 30 | } | ||
| 31 | |||
| 32 | cmd := exec.Command("go", "run", ".", "--root", dir, "--debounce", "100ms") | ||
| 33 | stdin, err := cmd.StdinPipe() | ||
| 34 | if err != nil { | ||
| 35 | t.Fatal(err) | ||
| 36 | } | ||
| 37 | stdout, err := cmd.StdoutPipe() | ||
| 38 | if err != nil { | ||
| 39 | t.Fatal(err) | ||
| 40 | } | ||
| 41 | cmd.Stderr = os.Stderr | ||
| 42 | if err := cmd.Start(); err != nil { | ||
| 43 | t.Fatal(err) | ||
| 44 | } | ||
| 45 | defer func() { | ||
| 46 | stdin.Close() | ||
| 47 | _ = cmd.Process.Kill() | ||
| 48 | _ = cmd.Wait() | ||
| 49 | }() | ||
| 50 | |||
| 51 | // Send initialize so srv.Run completes the handshake. | ||
| 52 | fmt.Fprintln(stdin, `{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-11-25","capabilities":{}}}`) | ||
| 53 | |||
| 54 | sc := bufio.NewScanner(stdout) | ||
| 55 | sc.Buffer(make([]byte, 1<<16), 1<<16) | ||
| 56 | if !sc.Scan() { | ||
| 57 | t.Fatal("no init response") | ||
| 58 | } | ||
| 59 | |||
| 60 | // Trigger an atomic save (tmpfile + rename) to be realistic. | ||
| 61 | tmp := target + ".tmp" | ||
| 62 | if err := os.WriteFile(tmp, []byte("// @claude please review\npackage foo\n"), 0o644); err != nil { | ||
| 63 | t.Fatal(err) | ||
| 64 | } | ||
| 65 | if err := os.Rename(tmp, target); err != nil { | ||
| 66 | t.Fatal(err) | ||
| 67 | } | ||
| 68 | |||
| 69 | // Look for the channel notification in subsequent frames. | ||
| 70 | deadline := time.Now().Add(5 * time.Second) | ||
| 71 | var sawChannel bool | ||
| 72 | for time.Now().Before(deadline) { | ||
| 73 | if !sc.Scan() { | ||
| 74 | break | ||
| 75 | } | ||
| 76 | var f map[string]any | ||
| 77 | if err := json.Unmarshal(sc.Bytes(), &f); err != nil { | ||
| 78 | continue | ||
| 79 | } | ||
| 80 | if f["method"] == "notifications/claude/channel" { | ||
| 81 | sawChannel = true | ||
| 82 | break | ||
| 83 | } | ||
| 84 | } | ||
| 85 | if !sawChannel { | ||
| 86 | t.Fatal("no notifications/claude/channel frame on stdout") | ||
| 87 | } | ||
| 88 | |||
| 89 | // Verify the file got stamped. Allow a brief moment for the rewriter | ||
| 90 | // to run after the notification was emitted. | ||
| 91 | deadline = time.Now().Add(2 * time.Second) | ||
| 92 | var got []byte | ||
| 93 | for time.Now().Before(deadline) { | ||
| 94 | got, _ = os.ReadFile(target) | ||
| 95 | if strings.Contains(string(got), "@claude[fw-") { | ||
| 96 | return | ||
| 97 | } | ||
| 98 | time.Sleep(50 * time.Millisecond) | ||
| 99 | } | ||
| 100 | t.Errorf("file not stamped:\n%s", got) | ||
| 101 | } | ||