--- /dev/null
+" Tests for reltime()
+
+if !has('reltime') || !has('float')
+ finish
+endif
+
+func Test_reltime()
+ let now = reltime()
+ sleep 10m
+ let later = reltime()
+ let elapsed = reltime(now)
+ call assert_true(reltimestr(elapsed) =~ '0\.0')
+ call assert_true(reltimestr(elapsed) != '0.0')
+ call assert_true(reltimefloat(elapsed) < 0.1)
+ call assert_true(reltimefloat(elapsed) > 0.0)
+
+ let same = reltime(now, now)
+ call assert_equal('0.000', split(reltimestr(same))[0][:4])
+ call assert_equal(0.0, reltimefloat(same))
+
+ let differs = reltime(now, later)
+ call assert_true(reltimestr(differs) =~ '0\.0')
+ call assert_true(reltimestr(differs) != '0.0')
+ call assert_true(reltimefloat(differs) < 0.1)
+ call assert_true(reltimefloat(differs) > 0.0)
+
+endfunc