test: defaults_spec.lua

2 files changed, 86 insertions, 3 deletions

diff --git a/runtime/doc/vim_diff.txt b/runtime/doc/vim_diff.txt
index 17e16911bc..17ee5975dd 100644
--- a/runtime/doc/vim_diff.txt
+++ b/runtime/doc/vim_diff.txt
@@ -31,9 +31,7 @@ these differences.
 2. Defaults					            *nvim-defaults*
 
 - Syntax highlighting is enabled by default
-- Filetype-related plugins and scripts are enabled by default
-  Note: these defaults can be disabled with the "-u NONE" command line
-  argument.  |-u|
+- ":filetype plugin indent on" is enabled by default
 
 - 'autoindent' is set by default
 - 'autoread' is set by default
diff --git a/test/functional/options/defaults_spec.lua b/test/functional/options/defaults_spec.lua
new file mode 100644
index 0000000000..7f0892ee3a
--- /dev/null
+++ b/test/functional/options/defaults_spec.lua
@@ -0,0 +1,85 @@
+local helpers = require('test.functional.helpers')
+local Screen = require('test.functional.ui.screen')
+local clear, feed = helpers.clear, helpers.feed
+local eval, eq, neq = helpers.eval, helpers.eq, helpers.neq
+local execute, source, expect = helpers.execute, helpers.source, helpers.expect
+
+local function init_session(...)
+  local args = { helpers.nvim_prog, '-i', 'NONE', '--embed',
+    '--cmd', 'set shortmess+=I background=light noswapfile noautoindent',
+    '--cmd', 'set laststatus=1 undodir=. directory=. viewdir=. backupdir=.'
+    }
+  for _, v in ipairs({...}) do
+    table.insert(args, v)
+  end
+  helpers.set_session(helpers.spawn(args))
+end
+
+describe('startup defaults', function()
+  before_each(function()
+    clear()
+  end)
+
+  describe(':filetype', function()
+    local function expect_filetype(expected)
+      local screen = Screen.new(48, 4)
+      screen:attach()
+      execute('filetype')
+      screen:expect([[
+        ^                                                |
+        ~                                               |
+        ~                                               |
+        ]]..expected
+      )
+    end
+
+    it('enabled by `-u NORC`', function()
+      init_session('-u', 'NORC')
+      expect_filetype(
+        'filetype detection:ON  plugin:ON  indent:ON     |')
+    end)
+
+    it('disabled by `-u NONE`', function()
+      init_session('-u', 'NONE')
+      expect_filetype(
+        'filetype detection:OFF  plugin:OFF  indent:OFF  |')
+    end)
+
+    it('overridden by early `filetype on`', function()
+      init_session('-u', 'NORC', '--cmd', 'filetype on')
+      expect_filetype(
+        'filetype detection:ON  plugin:OFF  indent:OFF   |')
+    end)
+
+    it('overridden by early `filetype plugin on`', function()
+      init_session('-u', 'NORC', '--cmd', 'filetype plugin on')
+      expect_filetype(
+        'filetype detection:ON  plugin:ON  indent:OFF    |')
+    end)
+
+    it('overridden by early `filetype indent on`', function()
+      init_session('-u', 'NORC', '--cmd', 'filetype indent on')
+      expect_filetype(
+        'filetype detection:ON  plugin:OFF  indent:ON    |')
+    end)
+  end)
+
+  describe('syntax', function()
+    it('enabled by `-u NORC`', function()
+      init_session('-u', 'NORC')
+      eq(1, eval('g:syntax_on'))
+    end)
+
+    it('disabled by `-u NONE`', function()
+      init_session('-u', 'NONE')
+      eq(0, eval('exists("g:syntax_on")'))
+    end)
+
+    it('overridden by early `syntax off`', function()
+      init_session('-u', 'NORC', '--cmd', 'syntax off')
+      eq(0, eval('exists("g:syntax_on")'))
+    end)
+  end)
+end)
+
+