From 8698c44e2a65357518eb59d0f5e33498082a3198 Mon Sep 17 00:00:00 2001
From: Donnie West <me@donniewest.com>
Date: Thu, 17 Oct 2019 21:16:04 -0500
Subject: Fix tsserver not returning details for items with empty source

---
 autoload/ale/completion.vim                        | 13 ++++++++++---
 test/completion/test_lsp_completion_messages.vader |  2 --
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/autoload/ale/completion.vim b/autoload/ale/completion.vim
index a15ca514..8b29d848 100644
--- a/autoload/ale/completion.vim
+++ b/autoload/ale/completion.vim
@@ -492,10 +492,17 @@ function! ale#completion#HandleTSServerResponse(conn_id, response) abort
             let l:identifiers = []
 
             for l:name in l:names
-                call add(l:identifiers, {
+                let l:identifier = {
                 \   'name': l:name.word,
-                \   'source': get(l:name, 'source', ''),
-                \})
+                \}
+                let l:source = get(l:name, 'source', '')
+
+                " Empty source results in no details for the completed item
+                if !empty(l:source)
+                    call extend(l:identifier, { 'source': l:source })
+                endif
+
+                call add(l:identifiers, l:identifier)
             endfor
 
             let b:ale_completion_info.request_id = ale#lsp#Send(
diff --git a/test/completion/test_lsp_completion_messages.vader b/test/completion/test_lsp_completion_messages.vader
index b997ac86..4b7392f5 100644
--- a/test/completion/test_lsp_completion_messages.vader
+++ b/test/completion/test_lsp_completion_messages.vader
@@ -190,10 +190,8 @@ Execute(The right message sent to the tsserver LSP when the first completion mes
   \          'source': '/path/to/foo.ts',
   \         }, {
   \          'name': 'FooBar',
-  \          'source': '',
   \         }, {
   \          'name': 'frazzle',
-  \          'source': '',
   \     }],
   \     'offset': 1,
   \     'line': 1,
-- 
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