Add JIT specs

spec/jit/fixtures/tier1.rb

@@ -0,0 +1,19 @@
+module JITSpecs
+  class Tier1Specs
+    def none
+      nil
+    end
+
+    def one(arg)
+      arg
+    end
+
+    def strlit
+      "hello"
+    end
+
+    def str_build(obj)
+      "-#{obj}-"
+    end
+  end
+end

spec/jit/string_spec.rb

@@ -0,0 +1,15 @@
+require File.expand_path("../fixtures/tier1", __FILE__)
+
+describe "tier1 JIT" do
+  before do
+    @o = JITSpecs::Tier1Specs.new
+  end
+
+  it "can return a string literal" do
+    @o.__send_tier1__(:strlit).should == "hello"
+  end
+
+  it "can build a string" do
+    @o.__send_tier1__(:str_build, 1).should == "-1-"
+  end
+end