patch 7.4.1578
Problem: There is no way to invoke a function later or periodically.
Solution: Add timer support.
diff --git a/src/testdir/test_timers.vim b/src/testdir/test_timers.vim
new file mode 100644
index 0000000..9f58a35
--- /dev/null
+++ b/src/testdir/test_timers.vim
@@ -0,0 +1,32 @@
+" Test for timers
+
+if !has('timers')
+ finish
+endif
+
+func MyHandler(timer)
+ let s:val += 1
+endfunc
+
+func Test_oneshot()
+ let s:val = 0
+ let timer = timer_start(50, 'MyHandler')
+ sleep 200m
+ call assert_equal(1, s:val)
+endfunc
+
+func Test_repeat_three()
+ let s:val = 0
+ let timer = timer_start(50, 'MyHandler', {'repeat': 3})
+ sleep 500m
+ call assert_equal(3, s:val)
+endfunc
+
+func Test_repeat_many()
+ let s:val = 0
+ let timer = timer_start(50, 'MyHandler', {'repeat': -1})
+ sleep 200m
+ call timer_stop(timer)
+ call assert_true(s:val > 1)
+ call assert_true(s:val < 5)
+endfunc