diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..1377554
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*.swp
diff --git a/tests/optimizer.rb b/tests/optimizer.rb
new file mode 100644
index 0000000..d0db55c
--- /dev/null
+++ b/tests/optimizer.rb
@@ -0,0 +1,6 @@
+class OptimizerTest < Test::Unit::TestCase
+	context "Optimizer" do
+	should "optimize many charblocks to one charblock" do
+		/[a-dt-z]/.to_s == RegExpr[ main: '[a-d] | [t-z]'].to_r.to_s
+	end
+end