#3: add embedded-Postgres E2E test validating F1 inbound SMTP against PLAN acceptance criteria
Boots a real Postgres (no Docker), applies the real migration and seed, starts the real go-smtp server wired as main.go does, and drives a live SMTP session. Asserts: 550 for unknown RCPT, durable EML + row with uid_next allocation, sha256 disk/db match, outbox event, blob dedup with ref_count. Documents the counters gap (PLAN 6.1) as an explicit skip. Phase: F1 validation Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Lucas RayanandClaude Fable 5 committed
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// Package e2e contains end-to-end validation of the F0/F1 scope declared in
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// PLAN.md section 16: a real Postgres (embedded, no Docker required), the real
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// migration, the real SMTP server wired exactly as cmd/lambdamail-protocols
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// does, and a real SMTP client driving the session.
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//
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// Run: go test ./internal/e2e/ -v (downloads Postgres binaries on first run).
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package e2e
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import (
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"context"
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"crypto/sha256"
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"encoding/hex"
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"fmt"
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"net"
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"net/smtp"
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"os"
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"path/filepath"
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"strings"
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"testing"
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"time"
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embeddedpostgres "github.com/fergusstrange/embedded-postgres"
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gosmtp "github.com/emersion/go-smtp"
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"lambdamail/protocols/internal/application/usecase"
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"lambdamail/protocols/internal/infrastructure/diskstorage"
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"lambdamail/protocols/internal/infrastructure/postgres"
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smtppresentation "lambdamail/protocols/internal/presentation/smtp"
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)
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const testMessage = "From: sender@remote.example\r\n" +
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"To: postmaster@example.test\r\n" +
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"Subject: e2e smoke\r\n" +
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"\r\n" +
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"F1 inbound validation body.\r\n"
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func TestInboundSMTPEndToEnd(t *testing.T) {
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if testing.Short() {
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t.Skip("e2e test skipped in -short mode")
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}
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ctx := context.Background()
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// --- 1. Real Postgres via embedded binaries ---------------------------
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runtimeDir := t.TempDir()
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pg := embeddedpostgres.NewDatabase(embeddedpostgres.DefaultConfig().
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Port(54329).
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RuntimePath(runtimeDir).
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StartTimeout(120 * time.Second))
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if err := pg.Start(); err != nil {
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t.Fatalf("start embedded postgres: %v", err)
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}
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defer pg.Stop()
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dbURL := "postgres://postgres:postgres@localhost:54329/postgres?sslmode=disable"
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pool, err := postgres.NewPool(ctx, dbURL)
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if err != nil {
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t.Fatalf("connect: %v", err)
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}
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defer pool.Close()
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// --- 2. Real migration + dev seed ------------------------------------
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root := repoRoot(t)
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for _, f := range []string{
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filepath.Join(root, "migrations", "0001_init_schema.up.sql"),
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filepath.Join(root, "scripts", "dev-seed.sql"),
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} {
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sql, err := os.ReadFile(f)
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if err != nil {
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t.Fatalf("read %s: %v", f, err)
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}
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if _, err := pool.Exec(ctx, string(sql)); err != nil {
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t.Fatalf("apply %s: %v", f, err)
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}
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}
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// --- 3. Real server, wired exactly like main.go -----------------------
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spool := t.TempDir()
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uc := usecase.NewProcessInboundEmailUseCase(
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postgres.NewMailboxRepository(pool),
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diskstorage.NewLocalDiskBlobStorage(pool, spool),
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postgres.NewInboundMessageRepository(pool),
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)
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server := gosmtp.NewServer(smtppresentation.NewBackend(uc))
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server.Domain = "mail.example.test"
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ln, err := net.Listen("tcp", "127.0.0.1:0")
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if err != nil {
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t.Fatalf("listen: %v", err)
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}
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go server.Serve(ln)
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defer server.Close()
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addr := ln.Addr().String()
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// --- 4. Unknown recipient must be rejected in-session (550) -----------
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c, err := smtp.Dial(addr)
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if err != nil {
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t.Fatalf("dial: %v", err)
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}
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if err := c.Mail("sender@remote.example"); err != nil {
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t.Fatalf("MAIL FROM: %v", err)
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}
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err = c.Rcpt("nobody@example.test")
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if err == nil {
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t.Fatal("RCPT for unknown user succeeded; PLAN section 6.1 requires 550 5.1.1")
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}
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if !strings.Contains(err.Error(), "550") {
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t.Errorf("unknown RCPT error = %q, want SMTP 550", err)
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}
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c.Close()
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// --- 5. Valid delivery ------------------------------------------------
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deliver := func() {
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t.Helper()
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if err := smtp.SendMail(addr, nil, "sender@remote.example",
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[]string{"postmaster@example.test"}, []byte(testMessage)); err != nil {
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t.Fatalf("SendMail: %v", err)
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}
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}
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deliver()
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// --- 6. Durability assertions (PLAN sections 6.1 and 9) ---------------
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var uid int64
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var blobPath string
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var sizeBytes int64
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err = pool.QueryRow(ctx, `
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SELECT m.uid, b.storage_path, b.size_bytes
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FROM email_messages m JOIN message_blobs b ON b.id = m.blob_id
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WHERE m.sender_address = 'sender@remote.example'
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ORDER BY m.uid LIMIT 1
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`).Scan(&uid, &blobPath, &sizeBytes)
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if err != nil {
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t.Fatalf("query persisted message: %v", err)
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}
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if uid != 1 {
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t.Errorf("first uid = %d, want 1 (folders.uid_next allocation)", uid)
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}
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raw, err := os.ReadFile(blobPath)
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if err != nil {
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t.Fatalf("EML file missing on disk: %v", err)
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}
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sum := sha256.Sum256(raw)
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var dbSum string
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if err := pool.QueryRow(ctx,
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`SELECT content_sha256 FROM message_blobs LIMIT 1`).Scan(&dbSum); err != nil {
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t.Fatalf("blob row: %v", err)
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}
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if hex.EncodeToString(sum[:]) != dbSum {
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t.Errorf("on-disk sha256 %x != db %s", sum, dbSum)
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}
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var outboxCount int
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if err := pool.QueryRow(ctx,
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`SELECT count(*) FROM domain_events_outbox WHERE event_type = 'EmailReceived'`).Scan(&outboxCount); err != nil {
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t.Fatalf("outbox: %v", err)
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}
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if outboxCount != 1 {
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t.Errorf("outbox events = %d, want 1", outboxCount)
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}
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// --- 7. Dedup: identical message again => 1 blob, ref_count 2, uid 2 --
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deliver()
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var blobs, refs int
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if err := pool.QueryRow(ctx,
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`SELECT count(*), max(ref_count) FROM message_blobs`).Scan(&blobs, &refs); err != nil {
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t.Fatalf("dedup query: %v", err)
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}
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if blobs != 1 || refs != 2 {
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t.Errorf("blobs=%d refs=%d, want 1 blob with ref_count 2 (PLAN section 9 dedup)", blobs, refs)
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}
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var maxUID int64
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if err := pool.QueryRow(ctx, `SELECT max(uid) FROM email_messages`).Scan(&maxUID); err != nil {
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t.Fatalf("uid query: %v", err)
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}
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if maxUID != 2 {
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t.Errorf("max uid = %d, want 2 (sequential per folder)", maxUID)
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}
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// --- 8. PLAN gaps this test documents deliberately --------------------
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// The following FAIL today and are expected to: they mark the F1 scope
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// that is not implemented yet. Remove t.Skip as each lands.
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t.Run("counters_updated", func(t *testing.T) {
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var unread, total int
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var used int64
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err := pool.QueryRow(ctx, `
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SELECT f.unread_count, f.total_count, mb.used_bytes
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FROM folders f JOIN mailboxes mb ON mb.id = f.mailbox_id
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WHERE f.special_use = 'inbox' AND mb.email_address = 'postmaster@example.test'
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`).Scan(&unread, &total, &used)
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if err != nil {
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t.Fatalf("counters query: %v", err)
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}
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if unread != 2 || total != 2 || used != sizeBytes*2 {
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t.Skipf("KNOWN GAP (PLAN 6.1 '++counters'): unread=%d total=%d used=%d — repository does not update folder counters or mailboxes.used_bytes yet", unread, total, used)
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}
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})
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_ = fmt.Sprintf // keep fmt imported if assertions above change
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}
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// repoRoot walks up from the test file location to the repository root.
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func repoRoot(t *testing.T) string {
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t.Helper()
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dir, err := os.Getwd()
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if err != nil {
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t.Fatal(err)
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}
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for i := 0; i < 8; i++ {
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if _, err := os.Stat(filepath.Join(dir, "PLAN.md")); err == nil {
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return dir
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}
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dir = filepath.Dir(dir)
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}
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t.Fatal("could not locate repository root (PLAN.md)")
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return ""
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}
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