legacy tests: migrate test51

src/nvim/testdir/test51.in

@@ -1,36 +0,0 @@
-Tests for ":highlight". vim: set ft=vim :
-
-STARTTEST
-:so small.vim
-:" basic test if ":highlight" doesn't crash
-:highlight
-:hi Search
-:" test setting colors.
-:" test clearing one color and all doesn't generate error or warning
-:hi NewGroup term=bold cterm=italic ctermfg=DarkBlue ctermbg=Grey gui= guifg=#00ff00 guibg=Cyan
-:hi Group2 term= cterm=
-:hi Group3 term=underline cterm=bold
-:redir! >test.out
-:hi NewGroup
-:hi Group2
-:hi Group3
-:hi clear NewGroup
-:hi NewGroup
-:hi Group2
-:hi Group2 NONE
-:hi Group2
-:hi clear
-:hi Group3
-:hi Crash term='asdf
-:redir END
-:" filter ctermfg and ctermbg, the numbers depend on the terminal
-:e test.out
-:%s/ctermfg=\d*/ctermfg=2/
-:%s/ctermbg=\d*/ctermbg=3/
-:" filter out possibly translated error message
-:%s/E475: [^:]*:/E475:/
-:" fix the fileformat
-:set ff&
-:wq!
-ENDTEST
-

src/nvim/testdir/test51.ok

@@ -1,20 +0,0 @@
-
-
-NewGroup       xxx term=bold cterm=italic ctermfg=2 ctermbg=3
-
-Group2         xxx cleared
-
-Group3         xxx term=underline cterm=bold
-
-
-NewGroup       xxx cleared
-
-Group2         xxx cleared
-
-
-Group2         xxx cleared
-
-
-Group3         xxx cleared
-
-E475: term='asdf

test/functional/legacy/051_highlight_spec.lua

@@ -0,0 +1,70 @@
+-- vim: set foldmethod=marker foldmarker=[[,]] :
+-- Tests for ":highlight".
+
+local helpers = require('test.functional.helpers')
+local clear, feed, insert = helpers.clear, helpers.feed, helpers.insert
+local execute, expect = helpers.execute, helpers.expect
+
+describe(':highlight', function()
+  setup(clear)
+
+  it('is working', function()
+    -- Basic test if ":highlight" doesn't crash
+    execute('highlight')
+    execute('hi Search')
+
+    -- Test setting colors.
+    -- Test clearing one color and all doesn't generate error or warning
+    execute('hi NewGroup term=bold cterm=italic ctermfg=DarkBlue ctermbg=Grey gui= guifg=#00ff00 guibg=Cyan')
+    execute('hi Group2 term= cterm=')
+    execute('hi Group3 term=underline cterm=bold')
+    execute('redir! @a')
+    execute('hi NewGroup')
+    execute('hi Group2')
+    execute('hi Group3')
+    execute('hi clear NewGroup')
+    execute('hi NewGroup')
+    execute('hi Group2')
+    execute('hi Group2 NONE')
+    execute('hi Group2')
+    execute('hi clear')
+    execute('hi Group3')
+    execute([[hi Crash term='asdf]])
+    execute('redir END')
+
+    -- Filter ctermfg and ctermbg, the numbers depend on the terminal
+    execute('0put a')
+    execute([[%s/ctermfg=\d*/ctermfg=2/]])
+    execute([[%s/ctermbg=\d*/ctermbg=3/]])
+
+    -- Filter out possibly translated error message
+    execute('%s/E475: [^:]*:/E475:/')
+
+    -- Fix the fileformat
+    execute('set ff&')
+    execute('$d')
+
+    -- Assert buffer contents.
+    expect([[
+      
+      
+      NewGroup       xxx term=bold cterm=italic ctermfg=2 ctermbg=3
+      
+      Group2         xxx cleared
+      
+      Group3         xxx term=underline cterm=bold
+      
+      
+      NewGroup       xxx cleared
+      
+      Group2         xxx cleared
+      
+      
+      Group2         xxx cleared
+      
+      
+      Group3         xxx cleared
+      
+      E475: term='asdf]])
+  end)
+end)