patch 8.2.2632: not all command line arguments are tested

Problem:    Not all command line arguments are tested.
Solution:   Add tests for -D and -serverlist. (Dominique Pellé, closes #7992)

Author: brammool

src/testdir/test_clientserver.vim

@@ -43,6 +43,14 @@ func Test_client_server()
   " When using valgrind it takes much longer.
   call WaitForAssert({-> assert_match(name, serverlist())})
 
+  if !has('win32')
+    if RunVim([], [], '--serverlist >Xtest_serverlist')
+      let lines = readfile('Xtest_serverlist')
+      call assert_true(index(lines, 'XVIMTEST') >= 0)
+    endif
+    call delete('Xtest_serverlist')
+  endif
+
   eval name->remote_foreground()
 
   call remote_send(name, ":let testvar = 'yes'\<CR>")

src/testdir/test_startup.vim

@@ -1121,6 +1121,21 @@ func Test_E_arg()
   endif
 endfunc
 
+" Test for the "-D" (debugger) argument
+func Test_D_arg()
+  CheckRunVimInTerminal
+
+  let cmd = GetVimCommandCleanTerm() .. ' -D'
+  let buf = term_start(cmd, {'term_rows' : 10})
+  call WaitForAssert({-> assert_equal("running", term_getstatus(buf))})
+
+  call WaitForAssert({-> assert_equal('Entering Debug mode.  Type "cont" to continue.',
+  \                  term_getline(buf, 7))})
+  call WaitForAssert({-> assert_equal('>', term_getline(buf, 10))})
+
+  call StopVimInTerminal(buf)
+endfunc
+
 " Test for too many edit argument errors
 func Test_too_many_edit_args()
   " Can't catch the output of gvim.

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2632,
 /**/
     2631,
 /**/