| 1 | // SPDX-License-Identifier: AGPL-3.0-or-later |
| 2 | |
| 3 | package protocol_test |
| 4 | |
| 5 | import ( |
| 6 | "bytes" |
| 7 | "context" |
| 8 | "os/exec" |
| 9 | "path/filepath" |
| 10 | "strings" |
| 11 | "testing" |
| 12 | "time" |
| 13 | |
| 14 | "github.com/tenseleyFlow/shithub/internal/git/protocol" |
| 15 | ) |
| 16 | |
| 17 | func TestWritePkt_Format(t *testing.T) { |
| 18 | t.Parallel() |
| 19 | var buf bytes.Buffer |
| 20 | if err := protocol.WritePkt(&buf, "hi"); err != nil { |
| 21 | t.Fatalf("WritePkt: %v", err) |
| 22 | } |
| 23 | // 4-hex prefix = len(payload)+4 = 6 -> "0006" |
| 24 | if got := buf.String(); got != "0006hi" { |
| 25 | t.Fatalf("got %q, want %q", got, "0006hi") |
| 26 | } |
| 27 | } |
| 28 | |
| 29 | func TestWritePkt_RejectsTooLong(t *testing.T) { |
| 30 | t.Parallel() |
| 31 | var buf bytes.Buffer |
| 32 | huge := strings.Repeat("a", protocol.MaxPktLine) |
| 33 | if err := protocol.WritePkt(&buf, huge); err == nil { |
| 34 | t.Fatal("expected error for over-length pkt") |
| 35 | } |
| 36 | } |
| 37 | |
| 38 | func TestServiceAdvertisement(t *testing.T) { |
| 39 | t.Parallel() |
| 40 | var buf bytes.Buffer |
| 41 | if err := protocol.WriteServiceAdvertisement(&buf, "git-upload-pack"); err != nil { |
| 42 | t.Fatalf("WriteServiceAdvertisement: %v", err) |
| 43 | } |
| 44 | got := buf.String() |
| 45 | // Expected: "001e# service=git-upload-pack\n0000" |
| 46 | want := "001e# service=git-upload-pack\n0000" |
| 47 | if got != want { |
| 48 | t.Fatalf("got %q, want %q", got, want) |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | // TestCmd_StreamsAndDrainsStderr exercises the exec wrapper end-to-end: |
| 53 | // init a bare repo, run upload-pack --advertise-refs against it, drain |
| 54 | // stderr, and check stdout looks like a valid (empty) ref advertisement. |
| 55 | func TestCmd_StreamsAndDrainsStderr(t *testing.T) { |
| 56 | t.Parallel() |
| 57 | gitDir := initBare(t) |
| 58 | |
| 59 | cmd := protocol.Cmd(context.Background(), protocol.UploadPack, gitDir, true, nil) |
| 60 | stderr := protocol.DrainStderr(cmd) |
| 61 | out, err := cmd.Output() |
| 62 | if err != nil { |
| 63 | t.Fatalf("Cmd run: %v\nstderr: %s", err, stderr()) |
| 64 | } |
| 65 | // First 4 chars are a hex length prefix; the body should mention |
| 66 | // either a ref or the no-refs sentinel git emits for unborn HEAD. |
| 67 | if len(out) < 4 { |
| 68 | t.Fatalf("output too short: %q", out) |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | // TestCmd_KillsOnContextCancel verifies that cancelling ctx kills the |
| 73 | // subprocess promptly (Go's default cmd.Cancel sends SIGKILL). |
| 74 | func TestCmd_KillsOnContextCancel(t *testing.T) { |
| 75 | t.Parallel() |
| 76 | ctx, cancel := context.WithCancel(context.Background()) |
| 77 | |
| 78 | // `git fetch` against a never-resolving URL hangs indefinitely; |
| 79 | // we'll use that as our long-running subprocess. |
| 80 | gitDir := initBare(t) |
| 81 | //nolint:gosec // G204: gitDir is t.TempDir. |
| 82 | cmd := exec.CommandContext(ctx, "git", "-C", gitDir, "fetch", "https://example.invalid/never-resolves") |
| 83 | cmd.WaitDelay = 250 * time.Millisecond |
| 84 | if err := cmd.Start(); err != nil { |
| 85 | t.Fatalf("Start: %v", err) |
| 86 | } |
| 87 | |
| 88 | go func() { |
| 89 | time.Sleep(100 * time.Millisecond) |
| 90 | cancel() |
| 91 | }() |
| 92 | start := time.Now() |
| 93 | _ = cmd.Wait() // expect non-nil; we just care it returns |
| 94 | if elapsed := time.Since(start); elapsed > 5*time.Second { |
| 95 | t.Fatalf("subprocess took %s to die after cancel; expected <5s", elapsed) |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | func initBare(t *testing.T) string { |
| 100 | t.Helper() |
| 101 | root := t.TempDir() |
| 102 | gitDir := filepath.Join(root, "x.git") |
| 103 | //nolint:gosec // G204: t.TempDir. |
| 104 | if out, err := exec.Command("git", "init", "--bare", "--initial-branch=trunk", gitDir).CombinedOutput(); err != nil { |
| 105 | t.Fatalf("git init: %v\n%s", err, out) |
| 106 | } |
| 107 | return gitDir |
| 108 | } |
| 109 |