From fc072a07727865b664dbaaad582b20c0d48c904e Mon Sep 17 00:00:00 2001
From: w0rp <devw0rp@gmail.com>
Date: Thu, 9 Mar 2017 20:22:02 +0000
Subject: [PATCH] Get milliseconds timestamps without system() calls for tests

---
 autoload/ale/engine.vim |  6 +++---
 autoload/ale/util.vim   | 10 ++++++++++
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/autoload/ale/engine.vim b/autoload/ale/engine.vim
index 1ab9c8b2..63362785 100644
--- a/autoload/ale/engine.vim
+++ b/autoload/ale/engine.vim
@@ -644,7 +644,7 @@ endfunction
 " The time taken will be a very rough approximation, and more time may be
 " permitted than is specified.
 function! ale#engine#WaitForJobs(deadline) abort
-    let l:start_time = system('date +%s%3N') + 0
+    let l:start_time = ale#util#ClockMilliseconds()
 
     if l:start_time == 0
         throw 'Failed to read milliseconds from the clock!'
@@ -664,7 +664,7 @@ function! ale#engine#WaitForJobs(deadline) abort
 
         for l:job in l:job_list
             if job_status(l:job) ==# 'run'
-                let l:now = system('date +%s%3N') + 0
+                let l:now = ale#util#ClockMilliseconds()
 
                 if l:now - l:start_time > a:deadline
                     " Stop waiting after a timeout, so we don't wait forever.
@@ -697,7 +697,7 @@ function! ale#engine#WaitForJobs(deadline) abort
 
     if l:has_new_jobs
         " We have to wait more. Offset the timeout by the time taken so far.
-        let l:now = system('date +%s%3N') + 0
+        let l:now = ale#util#ClockMilliseconds()
         let l:new_deadline = a:deadline - (l:now - l:start_time)
 
         if l:new_deadline <= 0
diff --git a/autoload/ale/util.vim b/autoload/ale/util.vim
index bf00051a..600717db 100644
--- a/autoload/ale/util.vim
+++ b/autoload/ale/util.vim
@@ -134,3 +134,13 @@ function! ale#util#InSandbox() abort
 
     return 0
 endfunction
+
+" Get the number of milliseconds since some vague, but consistent, point in
+" the past.
+"
+" This function can be used for timing execution, etc.
+"
+" The time will be returned as a Number.
+function! ale#util#ClockMilliseconds() abort
+    return float2nr(reltimefloat(reltime()) * 1000)
+endfunction