versioning spec helpers

spec/spec_helper.rb

@@ -19,3 +19,37 @@ def encode_basic(username, password)
 RSpec.configure do |config|
   config.include Rack::Test::Methods
 end
+
+# Versioning
+
+# Returns the path with options[:version] prefixed if options[:using] is :path.
+# Returns normal path otherwise.
+def versioned_path(options = {})
+  case options[:using]
+  when :path
+    File.join('/', options[:prefix] || '', options[:version], options[:path])
+  when :header
+    File.join('/', options[:prefix] || '', options[:path])
+  else
+    raise ArgumentError.new("unknown versioning strategy: #{options[:using]}")
+  end
+end
+
+def versioned_headers(options)
+  case options[:using]
+  when :path
+    {}  # no-op
+  when :header
+    {
+      'HTTP_ACCEPT' => "application/vnd.#{options[:vendor]}-#{options[:version]}+#{options[:format]}"
+    }
+  else
+    raise ArgumentError.new("unknown versioning strategy: #{options[:using]}")
+  end
+end
+
+def versioned_get(path, version_name, version_options = {})
+  path    = versioned_path(version_options.merge(:version => version_name, :path => path))
+  headers = versioned_headers(version_options.merge(:version => version_name))
+  get path, {}, headers
+end