From 0b50ebb0f0116f38782fed4aebf25588433352a2 Mon Sep 17 00:00:00 2001
From: w0rp <devw0rp@gmail.com>
Date: Wed, 19 Jul 2017 10:26:03 +0100
Subject: [PATCH] Fix #779 - Handle empty output for tslint

---
 ale_linters/typescript/tslint.vim      | 4 ++++
 test/handler/test_tslint_handler.vader | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/ale_linters/typescript/tslint.vim b/ale_linters/typescript/tslint.vim
index 43ece55..e9b3164 100644
--- a/ale_linters/typescript/tslint.vim
+++ b/ale_linters/typescript/tslint.vim
@@ -14,6 +14,10 @@ endfunction
 function! ale_linters#typescript#tslint#Handle(buffer, lines) abort
     let l:output = []
 
+    if empty(a:lines)
+        return []
+    endif
+
     for l:error in json_decode(join(a:lines, ''))
         if ale#path#IsBufferPath(a:buffer, l:error.name)
             call add(l:output, {
diff --git a/test/handler/test_tslint_handler.vader b/test/handler/test_tslint_handler.vader
index ae87c52..704123d 100644
--- a/test/handler/test_tslint_handler.vader
+++ b/test/handler/test_tslint_handler.vader
@@ -117,3 +117,8 @@ Execute(The tslint handler should parse lines correctly):
   \     }
   \   },
   \])])
+
+Execute(The tslint handler should handle empty output):
+  AssertEqual
+  \ [],
+  \ ale_linters#typescript#tslint#Handle(bufnr(''), [])