From 66b1c80376ad6cc2a4bf2e84e2efd90b657727fa Mon Sep 17 00:00:00 2001
From: Timo Uhlmann <t.uhlmann@zeroseven.de>
Date: Fri, 27 Sep 2019 15:41:06 +0200
Subject: [PATCH] Add test case for #151

---
 test/engine_test.rb | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/test/engine_test.rb b/test/engine_test.rb
index 29681d7a..e67ab5d7 100644
--- a/test/engine_test.rb
+++ b/test/engine_test.rb
@@ -310,5 +310,14 @@ def test_import_plain_css
       output = Engine.new("@import 'test'").render
       assert_equal expected_output, output
     end
+
+    def test_color_functions
+      expected_output = <<-CSS
+a {
+  color: #aabbcc; }
+  CSS
+      output = Engine.new('a { color: lighten(#abc, 0%); }').render
+      assert_equal expected_output, output
+    end
   end
 end