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tail_test.go
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tail_test.go
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package tail //nolint:testpackage // TODO
import (
"io"
"os"
"syscall"
"testing"
"time"
"github.com/powerman/check"
)
func TestInvalidPath(tt *testing.T) {
t := check.T(tt)
t.Parallel()
tail := newTestTail(t)
defer tail.Close()
tail.path = ""
tail.Run()
tail.Want(pollTimeout-pollDelay/2, "", nil)
tail.Want(pollDelay, "", syscall.ENOENT)
}
func TestNotExists(tt *testing.T) {
t := check.T(tt)
t.Parallel()
tail := newTestTail(t)
defer tail.Close()
tail.Remove()
tail.Run()
tail.Want(pollTimeout-pollDelay/2, "", nil)
tail.Want(pollDelay, "", syscall.ENOENT)
}
func TestNotExistsGrow(tt *testing.T) {
t := check.T(tt)
t.Parallel()
tail := newTestTail(t)
defer tail.Close()
tail.Remove()
tail.Run()
time.Sleep(pollDelay / 2)
tail.Create()
tail.Write("new1.1\nnew1.2\n")
tail.Want(pollDelay*3/2, "new1.1\nnew1.2\n", nil)
tail.Want(pollTimeout+pollDelay/2, "", nil)
}
func TestEmpty(tt *testing.T) {
t := check.T(tt)
t.Parallel()
tail := newTestTail(t)
defer tail.Close()
tail.Run()
tail.Want(pollTimeout+pollDelay/2, "", nil)
}
func TestEmptyGrow(tt *testing.T) {
t := check.T(tt)
t.Parallel()
tail := newTestTail(t)
defer tail.Close()
tail.Run()
tail.Write("new1\n")
tail.Want(pollDelay*3/2, "new1\n", nil)
}
func TestEmptyGrowAsync(tt *testing.T) {
t := check.T(tt)
t.Parallel()
tail := newTestTail(t)
defer tail.Close()
tail.Run()
go func() {
time.Sleep(pollDelay / 2)
tail.Write("new1.1\nnew1.2\n")
time.Sleep(pollDelay)
tail.Write("new2\n")
time.Sleep(pollTimeout * 2)
tail.Write("new3\n")
time.Sleep(pollTimeout)
tail.Write("new4\n")
}()
tail.Want(pollTimeout*3, "new1.1\nnew1.2\nnew2\nnew3\n", nil)
tail.Want(pollTimeout+pollDelay/2, "new4\n", nil)
}
func TestNotEmptyGrow(tt *testing.T) {
t := check.T(tt)
t.Parallel()
tail := newTestTail(t)
defer tail.Close()
tail.Write("old1.1\nold1.2\n")
tail.Run()
tail.Want(pollTimeout+pollDelay/2, "", nil)
tail.Write("new1.1\nnew1.2\n")
tail.Write("new2\n")
tail.Want(pollDelay*3/2, "new1.1\nnew1.2\nnew2\n", nil)
}
func TestNotEmptyGrowBytes(tt *testing.T) {
t := check.T(tt)
t.Parallel()
tail := newTestTail(t)
defer tail.Close()
tail.Write("old\nab")
tail.Run()
tail.Want(pollTimeout+pollDelay/2, "", nil)
tail.Write("cd")
tail.Want(pollDelay*3/2, "cd", nil)
tail.Write("ef\ngh")
tail.Want(pollDelay*3/2, "ef\ngh", nil)
}
func TestFIFOGrow(tt *testing.T) {
t := check.T(tt)
t.Parallel()
tail := newTestTail(t)
defer tail.Close()
tail.Remove()
tail.CreateFIFO()
tail.Run()
go func() {
tail.Write("new1.1\nnew1.2\n")
time.Sleep(pollDelay)
tail.Write("new2\n")
}()
tail.Want(pollDelay*5/2, "new1.1\nnew1.2\nnew2\n", nil)
tail.Want(pollTimeout+pollDelay/2, "", nil)
}
func TestClose(tt *testing.T) {
t := check.T(tt)
t.Parallel()
tail := newTestTail(t)
defer tail.Close()
tail.Write("old1.1\nold1.2\n")
tail.Run()
tail.Write("new1\n")
tail.Want(pollDelay*3/2, "new1\n", nil)
tail.Cancel()
tail.Write("new2\n")
tail.Want(pollDelay*2, "", io.EOF)
tail.Cancel()
tail.Write("new3\n")
tail.Want(pollDelay*2, "", io.ErrClosedPipe) // error from testTail, not from Tail
_, err := tail.Tail.Read(make([]byte, 8))
t.Err(err, io.EOF)
_, err = tail.Tail.Read(nil)
t.Err(err, io.EOF)
}
func TestRenameGrow(tt *testing.T) {
t := check.T(tt)
t.Parallel()
tail := newTestTail(t)
defer tail.Close()
tail.Run()
tail.Want(pollTimeout+pollDelay/2, "", nil)
tail.Rename()
tail.Write("new1.1\nnew1.2\n")
tail.Want(pollDelay*2, "new1.1\nnew1.2\n", nil)
}
func TestRemoveGrow(tt *testing.T) {
t := check.T(tt)
t.Parallel()
tail := newTestTail(t)
defer tail.Close()
tail.Run()
tail.Want(pollTimeout+pollDelay/2, "", nil)
tail.Remove()
tail.Write("new1.1\nnew1.2\n")
tail.Want(pollDelay*2, "new1.1\nnew1.2\n", nil)
}
func TestRotate(tt *testing.T) {
t := check.T(tt)
t.Parallel()
tail := newTestTail(t)
defer tail.Close()
tail.Run()
tail.Write("old1\n")
time.Sleep(pollDelay / 2)
tail.Write("old2\n")
time.Sleep(pollDelay / 2)
tail.Write("old3\n")
time.Sleep(pollDelay / 2)
tail.Write("old4\n")
time.Sleep(pollDelay / 2)
tail.Write("old5\n") // this one shouldn't be read by tail.Read before read()
time.Sleep(pollDelay / 2)
tail.Rename()
tail.Create()
tail.Write("new1.1\nnew1.2\n")
tail.Want(pollDelay*3/2, "old1\nold2\nold3\nold4\nold5\nnew1.1\nnew1.2\n", nil)
}
func TestRotateAtEOF(tt *testing.T) {
t := check.T(tt)
t.Parallel()
tail := newTestTail(t)
defer tail.Close()
tail.Run()
tail.Write("old1.1\nold1.2\n")
tail.Want(pollDelay*3/2, "old1.1\nold1.2\n", nil)
tail.Rename()
tail.Create()
tail.Write("new1.1\nnew1.2\n")
tail.Want(pollDelay*3/2, "new1.1\nnew1.2\n", nil)
}
func TestRotateAtEOFGrow(tt *testing.T) {
t := check.T(tt)
t.Parallel()
tail := newTestTail(t)
defer tail.Close()
tail.Run()
tail.Write("old1.1\nold1.2\n")
tail.Want(pollDelay*3/2, "old1.1\nold1.2\n", nil)
f := tail.f
tail.Rename()
tail.Create()
time.Sleep(pollDelay * 3 / 2)
_, err := f.Write([]byte("old2\n"))
t.Nil(err)
tail.Write("new1.1\nnew1.2\n")
tail.Want(pollDelay*3/2, "new1.1\nnew1.2\n", nil)
}
func TestSymlink(tt *testing.T) {
t := check.T(tt)
t.Parallel()
tail := newTestTail(t)
defer tail.Close()
tail.CreateSymlink()
tail.Run()
tail.Write("old1.1\nold1.2\n")
tail.Want(pollDelay*3/2, "old1.1\nold1.2\n", nil)
tail.Rename()
tail.Create()
tail.Write("new1.1\nnew1.2\n")
tail.Want(pollDelay*3/2, "new1.1\nnew1.2\n", nil)
}
func TestRotateSymlink(tt *testing.T) {
t := check.T(tt)
t.Parallel()
tail := newTestTail(t)
defer tail.Close()
tail.CreateSymlink()
tail.Run()
tail.Write("old1.1\nold1.2\n")
tail.Want(pollDelay*3/2, "old1.1\nold1.2\n", nil)
tail.RemoveSymlink()
time.Sleep(pollTimeout - pollDelay*5/2)
tail.Want(pollDelay*3/2, "", syscall.ENOENT)
tail.CreateSymlink()
tail.Write("new1.1\nnew1.2\n")
tail.Want(pollDelay*3/2, "new1.1\nnew1.2\nold1.1\nold1.2\nnew1.1\nnew1.2\n", nil)
tail.RemoveSymlink()
time.Sleep(pollTimeout + pollDelay/2)
tail.CreateSymlink()
tail.Write("new2\n")
tail.Want(pollDelay*3/2, "", syscall.ENOENT)
tail.Want(pollDelay*3/2, "new2\nold1.1\nold1.2\nnew1.1\nnew1.2\nnew2\n", nil)
}
func TestErrors(tt *testing.T) {
t := check.T(tt)
t.Parallel()
tail := newTestTail(t)
defer tail.Close()
t.Nil(os.Chmod(tail.path, 0))
tail.Run()
tail.Want(pollTimeout-pollDelay/2, "", nil)
tail.Want(pollDelay, "", syscall.EACCES)
tail.Remove()
tail.Want(pollTimeout-pollDelay/2, "", nil)
tail.Want(pollDelay, "", nil)
tail.Create()
tail.Want(pollDelay*3/2, "", nil)
tail.Remove()
tail.Want(pollTimeout-pollDelay/2, "", nil)
tail.Want(pollDelay, "", nil)
tail.Create()
tail.Write("new\n")
tail.Want(pollDelay*3/2, "new\n", nil)
tail.Remove()
tail.Want(pollTimeout-pollDelay, "", nil)
tail.Want(pollDelay*3/2, "", syscall.ENOENT)
}