| 1 | package activator |
| 2 | |
| 3 | import ( |
| 4 | "net" |
| 5 | "os" |
| 6 | "path/filepath" |
| 7 | "strings" |
| 8 | "sync" |
| 9 | "testing" |
| 10 | "time" |
| 11 | ) |
| 12 | |
| 13 | func TestLogListenerTeesOneConnectionAndRefusesASecond(t *testing.T) { |
| 14 | dir, err := os.MkdirTemp("", "ll") |
| 15 | if err != nil { |
| 16 | t.Fatal(err) |
| 17 | } |
| 18 | t.Cleanup(func() { os.RemoveAll(dir) }) |
| 19 | path := filepath.Join(dir, "h.run.sock") |
| 20 | var mu sync.Mutex |
| 21 | var lines []string |
| 22 | l, err := listenLogs(path, func(s string) { mu.Lock(); lines = append(lines, s); mu.Unlock() }) |
| 23 | if err != nil { |
| 24 | t.Skipf("cannot bind here (%v); run with TMPDIR=/tmp/g outside the sandbox", err) |
| 25 | } |
| 26 | defer l.Close() |
| 27 | c, err := net.Dial("unix", path) |
| 28 | if err != nil { |
| 29 | t.Fatal(err) |
| 30 | } |
| 31 | if _, err := c.Write([]byte("hello\nworld\n")); err != nil { |
| 32 | t.Fatal(err) |
| 33 | } |
| 34 | c.Close() |
| 35 | deadline := time.Now().Add(2 * time.Second) |
| 36 | for { |
| 37 | mu.Lock() |
| 38 | n := len(lines) |
| 39 | mu.Unlock() |
| 40 | if n == 2 || time.Now().After(deadline) { |
| 41 | break |
| 42 | } |
| 43 | time.Sleep(10 * time.Millisecond) |
| 44 | } |
| 45 | mu.Lock() |
| 46 | got := strings.Join(lines, "|") |
| 47 | mu.Unlock() |
| 48 | if got != "hello|world" { |
| 49 | t.Fatalf("lines = %q", got) |
| 50 | } |
| 51 | // A second connection during the same invocation is closed unread. |
| 52 | c2, err := net.Dial("unix", path) |
| 53 | if err != nil { |
| 54 | t.Fatal(err) |
| 55 | } |
| 56 | c2.SetReadDeadline(time.Now().Add(time.Second)) |
| 57 | buf := make([]byte, 1) |
| 58 | if _, err := c2.Read(buf); err == nil { |
| 59 | t.Fatal("second connection was not closed") |
| 60 | } |
| 61 | c2.Close() |
| 62 | if l.Exited() { |
| 63 | t.Error("EOF on the log connection must not mark the process exited") |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | // Close must shut the accepted connection and wait for the tee: a line |
| 68 | // written after Close returns must not reach the sink, and the tee |
| 69 | // goroutine must not outlive the listener. |
| 70 | func TestLogListenerCloseShutsTheConnectionAndWaitsForTheTee(t *testing.T) { |
| 71 | t.Parallel() |
| 72 | dir, err := os.MkdirTemp("", "ll") |
| 73 | if err != nil { |
| 74 | t.Fatal(err) |
| 75 | } |
| 76 | t.Cleanup(func() { os.RemoveAll(dir) }) |
| 77 | path := filepath.Join(dir, "h.run.sock") |
| 78 | var mu sync.Mutex |
| 79 | var lines []string |
| 80 | l, err := listenLogs(path, func(s string) { mu.Lock(); lines = append(lines, s); mu.Unlock() }) |
| 81 | if err != nil { |
| 82 | t.Skipf("cannot bind here (%v); run with TMPDIR=/tmp/g outside the sandbox", err) |
| 83 | } |
| 84 | c, err := net.Dial("unix", path) |
| 85 | if err != nil { |
| 86 | t.Fatal(err) |
| 87 | } |
| 88 | defer c.Close() |
| 89 | if _, err := c.Write([]byte("before\n")); err != nil { |
| 90 | t.Fatal(err) |
| 91 | } |
| 92 | deadline := time.Now().Add(2 * time.Second) |
| 93 | for { |
| 94 | mu.Lock() |
| 95 | n := len(lines) |
| 96 | mu.Unlock() |
| 97 | if n == 1 || time.Now().After(deadline) { |
| 98 | break |
| 99 | } |
| 100 | time.Sleep(10 * time.Millisecond) |
| 101 | } |
| 102 | done := make(chan error, 1) |
| 103 | go func() { done <- l.Close() }() |
| 104 | select { |
| 105 | case err := <-done: |
| 106 | if err != nil { |
| 107 | t.Fatalf("Close: %v", err) |
| 108 | } |
| 109 | case <-time.After(2 * time.Second): |
| 110 | t.Fatal("Close blocked on the open connection instead of shutting it") |
| 111 | } |
| 112 | // The peer sees its end closed and a late line goes nowhere. |
| 113 | c.SetReadDeadline(time.Now().Add(time.Second)) |
| 114 | if _, err := c.Read(make([]byte, 1)); err == nil { |
| 115 | t.Fatal("accepted connection still open after Close") |
| 116 | } |
| 117 | _, _ = c.Write([]byte("after\n")) |
| 118 | time.Sleep(50 * time.Millisecond) |
| 119 | mu.Lock() |
| 120 | got := strings.Join(lines, "|") |
| 121 | mu.Unlock() |
| 122 | if got != "before" { |
| 123 | t.Fatalf("lines after Close = %q, want only the line written before it", got) |
| 124 | } |
| 125 | } |
| 126 | |
amadan