From 190c8516f534499f89d610fc78a20c025386b2f2 Mon Sep 17 00:00:00 2001
From: ZyX <kp-pav@yandex.ru>
Date: Tue, 26 Sep 2017 23:13:55 +0300
Subject: unittests: Add a way to print trace on regular error

---
 test/unit/helpers.lua | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'test/unit/helpers.lua')

diff --git a/test/unit/helpers.lua b/test/unit/helpers.lua
index 4b9f185156..a629fca9a2 100644
--- a/test/unit/helpers.lua
+++ b/test/unit/helpers.lua
@@ -698,7 +698,14 @@ local function check_child_err(rd)
   local len_s = sc.read(rd, 5)
   local len = tonumber(len_s)
   neq(0, len)
-  local err = sc.read(rd, len + 1)
+  local err = ''
+  if os.getenv('NVIM_TEST_TRACE_ON_ERROR') == '1' and #trace ~= 0 then
+    err = '\nTest failed, trace:\n' .. tracehelp
+    for _, traceline in ipairs(trace) do
+      err = err .. traceline
+    end
+  end
+  err = err .. sc.read(rd, len + 1)
   assert.just_fail(err)
 end
 
-- 
cgit