[CI] Test Runner: Update parsing keys to consider '.' format

Author: picandocodigo

api-spec-testing/test_file/task_group.rb

@@ -296,7 +296,6 @@ def variables_to_transform_and_set
           def transform_and_set_variable(action)
             variables_to_transform_and_set.each do |set_definition|
               set_definition['transform_and_set'].each do |response_key, transform_description|
-
                 match_base_64_transform = /(\#base64EncodeCredentials\()(\S*)\)/
                 matches = match_base_64_transform.match(transform_description)
                 fields = matches[2].split(',') if matches.length > 0

api-spec-testing/test_file/test.rb

@@ -58,8 +58,15 @@ def find_value_in_document(chain, document)
           #
           # @since 6.2.0
           def split_and_parse_key(key)
-            key.split(/(?<!\\)\./).map do |key|
-              (key =~ /\A[-+]?[0-9]+\z/) ? key.to_i: key.gsub('\\', '')
+            key.split(/(?<!\\)\./).reject { |k| k.empty? }.map do |key_part|
+              case key_part
+               when /^\.\$/ # For keys in the form of .$key
+                 key_part.gsub(/^\./, '')
+              when /\A[-+]?[0-9]+\z/
+                key_part.to_i
+              else
+                key_part.gsub('\\', '')
+              end
             end.reject { |k| k == '$body' }
           end
         end