1 files changed, 61 insertions, 0 deletions
diff --git a/test/functional/plugin/ccomplete_spec.lua b/test/functional/plugin/ccomplete_spec.lua
new file mode 100644
index 0000000000..903f16fc73
--- /dev/null
+++ b/test/functional/plugin/ccomplete_spec.lua
@@ -0,0 +1,61 @@
+local helpers = require('test.functional.helpers')(after_each)
+local clear = helpers.clear
+local command = helpers.command
+local eq = helpers.eq
+local eval = helpers.eval
+local feed = helpers.feed
+local write_file = helpers.write_file
+
+describe('ccomplete#Complete', function()
+  setup(function()
+    -- Realistic tags generated from neovim source tree using `ctags -R *`
+    write_file(
+      'Xtags',
+      [[
+augroup_del	src/nvim/autocmd.c	/^void augroup_del(char *name, bool stupid_legacy_mode)$/;"	f	typeref:typename:void
+augroup_exists	src/nvim/autocmd.c	/^bool augroup_exists(const char *name)$/;"	f	typeref:typename:bool
+augroup_find	src/nvim/autocmd.c	/^int augroup_find(const char *name)$/;"	f	typeref:typename:int
+aupat_get_buflocal_nr	src/nvim/autocmd.c	/^int aupat_get_buflocal_nr(char *pat, int patlen)$/;"	f	typeref:typename:int
+aupat_is_buflocal	src/nvim/autocmd.c	/^bool aupat_is_buflocal(char *pat, int patlen)$/;"	f	typeref:typename:bool
+expand_get_augroup_name	src/nvim/autocmd.c	/^char *expand_get_augroup_name(expand_T *xp, int idx)$/;"	f	typeref:typename:char *
+expand_get_event_name	src/nvim/autocmd.c	/^char *expand_get_event_name(expand_T *xp, int idx)$/;"	f	typeref:typename:char *
+]]
+    )
+  end)
+
+  before_each(function()
+    clear()
+    command('set tags=Xtags')
+  end)
+
+  teardown(function()
+    os.remove('Xtags')
+  end)
+
+  it('can complete from Xtags', function()
+    local completed = eval('ccomplete#Complete(0, "a")')
+    eq(5, #completed)
+    eq('augroup_del(', completed[1].word)
+    eq('f', completed[1].kind)
+
+    local aupat = eval('ccomplete#Complete(0, "aupat")')
+    eq(2, #aupat)
+    eq('aupat_get_buflocal_nr(', aupat[1].word)
+    eq('f', aupat[1].kind)
+  end)
+
+  it('does not error when returning no matches', function()
+    local completed = eval('ccomplete#Complete(0, "doesnotmatch")')
+    eq({}, completed)
+  end)
+
+  it('can find the beginning of a word for C', function()
+    command('set filetype=c')
+    feed('i  int something = augroup')
+    local result = eval('ccomplete#Complete(1, "")')
+    eq(#'  int something = ', result)
+
+    local completed = eval('ccomplete#Complete(0, "augroup")')
+    eq(3, #completed)
+  end)
+end)