test/old: restore test_alot_utf8.vim

Needed for later Vim patches.
Stub test_alot_latin.vim to avoid merge-conflict noise.

vim-patch:7.4.1700
vim-patch:7.4.1734
vim-patch:7.4.1740
vim-patch:7.4.2086
vim-patch:7.4.2223
vim-patch:8.0.0250

src/nvim/testdir/Makefile

@@ -109,6 +109,8 @@ NEW_TESTS ?= \
 	    test_winbuf_close.res \
 	    test_window_id.res \
 	    test_writefile.res \
+	    test_alot_latin.res \
+	    test_alot_utf8.res \
 	    test_alot.res
 
 SCRIPTS_GUI := test16.out

src/nvim/testdir/test_alot.vim

@@ -7,7 +7,6 @@ source test_cursor_func.vim
 source test_ex_undo.vim
 source test_execute_func.vim
 source test_expr.vim
-source test_expr_utf8.vim
 source test_feedkeys.vim
 source test_filter_cmd.vim
 source test_filter_map.vim

src/nvim/testdir/test_alot_latin.vim

@@ -0,0 +1,10 @@
+" A series of tests that can run in one Vim invocation.
+" This makes testing go faster, since Vim doesn't need to restart.
+
+" These tests use latin1 'encoding'.  Setting 'encoding' is in the individual
+" files, so that they can be run by themselves.
+
+" Nvim does not allow setting 'encoding', so skip this test group.
+finish
+
+source test_regexp_latin.vim

src/nvim/testdir/test_alot_utf8.vim

@@ -0,0 +1,12 @@
+" A series of tests that can run in one Vim invocation.
+" This makes testing go faster, since Vim doesn't need to restart.
+
+" These tests use utf8 'encoding'.  Setting 'encoding' is already done in
+" runtest.vim.  Checking for the multi_byte feature is in the individual
+" files, so that they can be run by themselves.
+
+source test_expr_utf8.vim
+source test_matchadd_conceal_utf8.vim
+source test_regexp_utf8.vim
+source test_source_utf8.vim
+source test_utf8.vim

src/nvim/testdir/test_expr_utf8.vim

@@ -3,7 +3,7 @@ if !has('multi_byte')
   finish
 endif
 
-func Test_strgetchar_utf8()
+func Test_strgetchar()
   call assert_equal(char2nr('á'), strgetchar('áxb', 0))
   call assert_equal(char2nr('x'), strgetchar('áxb', 1))
 
@@ -16,7 +16,7 @@ func Test_strgetchar_utf8()
   call assert_equal(char2nr('い'), strgetchar('あaい', 2))
 endfunc
 
-func Test_strcharpart_utf8()
+func Test_strcharpart()
   call assert_equal('áxb', strcharpart('áxb', 0))
   call assert_equal('á', strcharpart('áxb', 0, 1))
   call assert_equal('x', strcharpart('áxb', 1, 1))

src/nvim/testdir/test_regexp_latin.vim

@@ -0,0 +1,32 @@
+" Tests for regexp in latin1 encoding
+set encoding=latin1
+scriptencoding latin1
+
+func s:equivalence_test()
+  let str = "A<><41><EFBFBD><EFBFBD><EFBFBD><EFBFBD> B C D E<><45><EFBFBD><EFBFBD> F G H I<><49><EFBFBD><EFBFBD> J K L M N<> O<><4F><EFBFBD><EFBFBD><EFBFBD><EFBFBD> P Q R S T U<><55><EFBFBD><EFBFBD> V W X Y<> Z a<><61><EFBFBD><EFBFBD><EFBFBD><EFBFBD> b c d e<><65><EFBFBD><EFBFBD> f g h i<><69><EFBFBD><EFBFBD> j k l m n<> o<><6F><EFBFBD><EFBFBD><EFBFBD><EFBFBD> p q r s t u<><75><EFBFBD><EFBFBD> v w x y<><79> z"
+  let groups = split(str)
+  for group1 in groups
+      for c in split(group1, '\zs')
+	" next statement confirms that equivalence class matches every
+	" character in group
+        call assert_match('^[[=' . c . '=]]*$', group1)
+        for group2 in groups
+          if group2 != group1
+	    " next statement converts that equivalence class doesn't match
+	    " a character in any other group
+            call assert_equal(-1, match(group2, '[[=' . c . '=]]'))
+          endif
+        endfor
+      endfor
+  endfor
+endfunc
+
+func Test_equivalence_re1()
+  set re=1
+  call s:equivalence_test()
+endfunc
+
+func Test_equivalence_re2()
+  set re=2
+  call s:equivalence_test()
+endfunc