patch 7.4.1543
Problem:    Channel log methods are not tested.
Solution:   Log job activity and check it.
diff --git a/src/testdir/test_channel.vim b/src/testdir/test_channel.vim
index c965880..c50c1df 100644
--- a/src/testdir/test_channel.vim
+++ b/src/testdir/test_channel.vim
@@ -517,6 +517,7 @@
   if !has('job')
     return
   endif
+  call ch_logfile('Xlog')
   call ch_log('Test_nl_err_to_out_pipe()')
   let job = job_start(s:python . " test_channel_pipe.py", {'err-io': 'out'})
   call assert_equal("run", job_status(job))
@@ -529,6 +530,32 @@
     call assert_equal("wrong", ch_readraw(handle))
   finally
     call job_stop(job)
+    call ch_logfile('')
+    let loglines = readfile('Xlog')
+    call assert_true(len(loglines) > 10)
+    let found_test = 0
+    let found_send = 0
+    let found_recv = 0
+    let found_stop = 0
+    for l in loglines
+      if l =~ 'Test_nl_err_to_out_pipe'
+	let found_test = 1
+      endif
+      if l =~ 'SEND on.*echo something'
+	let found_send = 1
+      endif
+      if l =~ 'RECV on.*something'
+	let found_recv = 1
+      endif
+      if l =~ 'Stopping job with'
+	let found_stop = 1
+      endif
+    endfor
+    call assert_equal(1, found_test)
+    call assert_equal(1, found_send)
+    call assert_equal(1, found_recv)
+    call assert_equal(1, found_stop)
+    call delete('Xlog')
   endtry
 endfunc
 
diff --git a/src/version.c b/src/version.c
index 4812298..2eb0114 100644
--- a/src/version.c
+++ b/src/version.c
@@ -744,6 +744,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1543,
+/**/
     1542,
 /**/
     1541,