patch 8.2.4670: memory allocation failures for new tab page not tested

Problem:    Memory allocation failures for new tab page not tested.
Solution:   Add tests with failing memory allocation. (Yegappan Lakshmanan,
            closes #10067)
diff --git a/src/testdir/test_buffer.vim b/src/testdir/test_buffer.vim
index fd96c61..fc391dc 100644
--- a/src/testdir/test_buffer.vim
+++ b/src/testdir/test_buffer.vim
@@ -430,50 +430,50 @@
   set maxmem& maxmemtot&
 endfunc
 
-" Test for a allocation failure when adding a new buffer
+" Test for buffer allocation failure
 func Test_buflist_alloc_failure()
   %bw!
 
   edit Xfile1
-  call test_alloc_fail(GetAllocId('buflistnew_bvars'), 0, 0)
+  call test_alloc_fail(GetAllocId('newbuf_bvars'), 0, 0)
   call assert_fails('edit Xfile2', 'E342:')
 
   " test for bufadd()
-  call test_alloc_fail(GetAllocId('buflistnew_bvars'), 0, 0)
+  call test_alloc_fail(GetAllocId('newbuf_bvars'), 0, 0)
   call assert_fails('call bufadd("Xbuffer")', 'E342:')
 
   " test for setting the arglist
   edit Xfile2
-  call test_alloc_fail(GetAllocId('buflistnew_bvars'), 0, 0)
+  call test_alloc_fail(GetAllocId('newbuf_bvars'), 0, 0)
   call assert_fails('next Xfile3', 'E342:')
 
   " test for setting the alternate buffer name when writing a file
-  call test_alloc_fail(GetAllocId('buflistnew_bvars'), 0, 0)
+  call test_alloc_fail(GetAllocId('newbuf_bvars'), 0, 0)
   call assert_fails('write Xother', 'E342:')
   call delete('Xother')
 
   " test for creating a buffer using bufnr()
-  call test_alloc_fail(GetAllocId('buflistnew_bvars'), 0, 0)
+  call test_alloc_fail(GetAllocId('newbuf_bvars'), 0, 0)
   call assert_fails("call bufnr('Xnewbuf', v:true)", 'E342:')
 
   " test for renaming buffer using :file
-  call test_alloc_fail(GetAllocId('buflistnew_bvars'), 0, 0)
+  call test_alloc_fail(GetAllocId('newbuf_bvars'), 0, 0)
   call assert_fails('file Xnewfile', 'E342:')
 
   " test for creating a buffer for a popup window
-  call test_alloc_fail(GetAllocId('buflistnew_bvars'), 0, 0)
+  call test_alloc_fail(GetAllocId('newbuf_bvars'), 0, 0)
   call assert_fails('call popup_create("mypop", {})', 'E342:')
 
   if has('terminal')
     " test for creating a buffer for a terminal window
-    call test_alloc_fail(GetAllocId('buflistnew_bvars'), 0, 0)
+    call test_alloc_fail(GetAllocId('newbuf_bvars'), 0, 0)
     call assert_fails('call term_start(&shell)', 'E342:')
     %bw!
   endif
 
   " test for loading a new buffer after wiping out all the buffers
   edit Xfile4
-  call test_alloc_fail(GetAllocId('buflistnew_bvars'), 0, 0)
+  call test_alloc_fail(GetAllocId('newbuf_bvars'), 0, 0)
   call assert_fails('%bw!', 'E342:')
 
   " test for :checktime loading the buffer
@@ -484,19 +484,19 @@
     sleep 200m
     call writefile(['two'], 'Xfile5')
     set autoread
-    call test_alloc_fail(GetAllocId('buflistnew_bvars'), 0, 0)
+    call test_alloc_fail(GetAllocId('newbuf_bvars'), 0, 0)
     call assert_fails('checktime', 'E342:')
     set autoread&
     bw!
   endif
 
   " test for :vimgrep loading a dummy buffer
-  call test_alloc_fail(GetAllocId('buflistnew_bvars'), 0, 0)
+  call test_alloc_fail(GetAllocId('newbuf_bvars'), 0, 0)
   call assert_fails('vimgrep two Xfile5', 'E342:')
   call delete('Xfile5')
 
   " test for quickfix command loading a buffer
-  call test_alloc_fail(GetAllocId('buflistnew_bvars'), 0, 0)
+  call test_alloc_fail(GetAllocId('newbuf_bvars'), 0, 0)
   call assert_fails('cexpr "Xfile6:10:Line10"', 'E342:')
 endfunc