Improvements to parse_path

- parse_path now more closely matches that of Rack::Mount::Strexp in the
  way that it parses variables from the paths. This allows grape-swagger
  to generate proper documentation.

Author: justfalter

lib/grape-swagger.rb

@@ -152,7 +152,12 @@ def parse_header_params(params)
             def parse_path(path, version)
               # adapt format to swagger format
               parsed_path = path.gsub('(.:format)', '.{format}')
-              parsed_path = parsed_path.gsub(/:([a-z]+)/, '{\1}')
+              # This is attempting to emulate the behavior of 
+              # Rack::Mount::Strexp. We cannot use Strexp directly because 
+              # all it does is generate regular expressions for parsing URLs. 
+              # TODO: Implement a Racc tokenizer to properly generate the 
+              # parsed path.
+              parsed_path = parsed_path.gsub(/:([a-zA-Z_]\w*)/, '{\1}')
               # add the version
               parsed_path = parsed_path.gsub('{version}', version) if version
               parsed_path

spec/grape-swagger-helper_spec.rb

@@ -51,6 +51,24 @@ class HelperTestAPI < Grape::API
 			@api.parse_path(path, nil).should == "{abc}/def.{format}"
 		end
 
+    it "should parse a path that has vars with underscores in the name" do
+      path = "abc/:def_g(.:format)"
+			@api.parse_path(path, nil).should == "abc/{def_g}.{format}"
+      
+    end
+
+    it "should parse a path that has vars with numbers in the name" do
+      path = "abc/:sha1(.:format)"
+			@api.parse_path(path, nil).should == "abc/{sha1}.{format}"
+    end
+
+    it "should parse a path that has multiple variables" do
+      path1 = "abc/:def/:geh(.:format)"
+      path2 = "abc/:def:geh(.:format)"
+			@api.parse_path(path1, nil).should == "abc/{def}/{geh}.{format}"
+			@api.parse_path(path2, nil).should == "abc/{def}{geh}.{format}"
+    end
+
 		it "should parse the path with a specified version" do
 			path = ":abc/{version}/def(.:format)"
 			@api.parse_path(path, 'v1').should == "{abc}/v1/def.{format}"