Fix #516 (#517)

* Fix #516

* Fix

* Fix and tests

* fmt lint

lua/cmp/core_spec.lua

@@ -0,0 +1,78 @@
+local spec = require('cmp.utils.spec')
+local feedkeys = require('cmp.utils.feedkeys')
+local types = require('cmp.types')
+local core = require('cmp.core')
+local source = require('cmp.source')
+local keymap = require('cmp.utils.keymap')
+
+describe('cmp.core', function()
+  describe('confirm #confirm', function()
+    before_each(spec.before)
+
+    local confirm = function(request, filter, completion_item)
+      local c = core.new()
+      local s = source.new('spec', {
+        complete = function(_, _, callback)
+          callback({ completion_item })
+        end,
+      })
+      c:register_source(s)
+      feedkeys.call(request, 'n', function()
+        c:complete(c:get_context({ reason = types.cmp.ContextReason.Manual }))
+        vim.wait(5000, function()
+          return #c.sources[s.id].entries > 0
+        end)
+      end)
+      feedkeys.call(filter, 'n', function()
+        c:confirm(c.sources[s.id].entries[1], {})
+      end)
+      local state = {}
+      feedkeys.call('', 'x', function()
+        feedkeys.call('', 'n', function()
+          state.buffer = vim.api.nvim_buf_get_lines(0, 0, -1, false)
+          state.cursor = vim.api.nvim_win_get_cursor(0)
+        end)
+      end)
+      return state
+    end
+
+    it('label only', function()
+      local state = confirm('iA', 'IU', {
+        label = 'AIUEO',
+      })
+      assert.are.same(state.buffer, { 'AIUEO' })
+      assert.are.same(state.cursor, { 1, 5 })
+    end)
+
+    it('text edit', function()
+      local state = confirm(keymap.t('i***AEO***<Left><Left><Left><Left><Left>'), 'IU', {
+        label = 'AIUEO',
+        textEdit = {
+          range = {
+            start = {
+              line = 0,
+              character = 3,
+            },
+            ['end'] = {
+              line = 0,
+              character = 6,
+            },
+          },
+          newText = 'foo\nbar\nbaz',
+        },
+      })
+      assert.are.same(state.buffer, { '***foo', 'bar', 'baz***' })
+      assert.are.same(state.cursor, { 3, 3 })
+    end)
+
+    it('snippet', function()
+      local state = confirm('iA', 'IU', {
+        label = 'AIUEO',
+        insertText = 'AIUEO($0)',
+        insertTextFormat = types.lsp.InsertTextFormat.Snippet,
+      })
+      assert.are.same(state.buffer, { 'AIUEO()' })
+      assert.are.same(state.cursor, { 1, 6 })
+    end)
+  end)
+end)