patch 9.1.0893: No test that undofile format does not regress

chrisbra · chrisbra · commit 14382c8bc96c · 2024-11-28T21:59:33.000+01:00
Problem: No test that undofile format does not regress Solution: include a sample undofile to make sure we are always able to read it This is so, that we don't unintentionally change the undofile format and make sure we can load an undo file that has been created by an older Vim. closes: #16127 Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/Filelist b/Filelist
@@ -224,6 +224,7 @@ SRC_ALL =	\
 		src/testdir/samples/*.vim \
 		src/testdir/samples/test000 \
 		src/testdir/samples/test.zip \
+		src/testdir/samples/test_undo.txt.undo \
 		src/testdir/samples/testa.zip \
 		src/testdir/color_ramp.vim \
 		src/testdir/silent.wav \
diff --git a/src/testdir/samples/test_undo.txt b/src/testdir/samples/test_undo.txt
@@ -0,0 +1,3 @@
+one
+two
+three
diff --git a/src/testdir/samples/test_undo.txt.undo b/src/testdir/samples/test_undo.txt.undo
diff --git a/src/testdir/test_undo.vim b/src/testdir/test_undo.vim
@@ -884,4 +884,33 @@ func Test_undo_range_normal()
   bwipe!
 endfunc
 
+func Test_load_existing_undofile()
+  CheckFeature persistent_undo
+  sp samples/test_undo.txt
+  let mess=execute(':verbose rundo samples/test_undo.txt.undo')
+  call assert_match('Finished reading undo file', mess)
+
+  call assert_equal(['one', 'two', 'three'], getline(1, '$'))
+  norm! u
+  call assert_equal(['one', 'two'], getline(1, '$'))
+  norm! u
+  call assert_equal(['one'], getline(1, '$'))
+  norm! u
+  call assert_equal([''], getline(1, '$'))
+  let mess = execute(':norm! u')
+  call assert_equal([''], getline(1, '$'))
+  call assert_match('Already at oldest change', mess)
+  exe ":norm! \<c-r>"
+  call assert_equal(['one'], getline(1, '$'))
+  exe ":norm! \<c-r>"
+  call assert_equal(['one', 'two'], getline(1, '$'))
+  exe ":norm! \<c-r>"
+  call assert_equal(['one', 'two', 'three'], getline(1, '$'))
+  let mess = execute(":norm! \<c-r>")
+  call assert_equal(['one', 'two', 'three'], getline(1, '$'))
+  call assert_match('Already at newest change', mess)
+  bw!
+endfunc
+
+
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/version.c b/src/version.c
@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    893,
 /**/
     892,
 /**/
