Allow letting of headers

lib/rspec_api_documentation/dsl/endpoint.rb

@@ -62,7 +62,15 @@ def params
     end
 
     def headers
-      example.metadata[:headers]
+      return unless example.metadata[:headers]
+      example.metadata[:headers].inject({}) do |hash, header|
+        if header[1].is_a?(Symbol)
+          hash[header[0]] = send(header[1]) if respond_to?(header[1])
+        else
+          hash[header[0]] = header[1]
+        end
+        hash
+      end
     end
 
     def method

spec/dsl_spec.rb

@@ -436,6 +436,36 @@
         end
       end
     end
+
+    put "/orders" do
+      header "Accept", :accept
+
+      let(:accept) { "application/json" }
+
+      it "should be sent with the request" do
+        example.metadata[:headers].should == { "Accept" => :accept }
+      end
+
+      it "should fill out into the headers" do
+        headers.should == { "Accept" => "application/json" }
+      end
+
+      context "nested headers" do
+        header "Content-Type", "application/json"
+
+        it "does not affect the outer context's assertions" do
+          headers.should == { "Accept" => "application/json", "Content-Type" => "application/json" }
+        end
+      end
+
+      context "header was not let" do
+        header "X-My-Header", :my_header
+
+        it "should not be in the headers hash" do
+          headers.should == { "Accept" => "application/json" }
+        end
+      end
+    end
   end
 end