credentials.rb in googleauth-0.16.0

- old
+ new

@@ -367,13 +367,14 @@
       #
       def initialize keyfile, options = {}
         verify_keyfile_provided! keyfile
         @project_id = options["project_id"] || options["project"]
         @quota_project_id = options["quota_project_id"]
-        if keyfile.is_a? Signet::OAuth2::Client
+        case keyfile
+        when Signet::OAuth2::Client
           update_from_signet keyfile
-        elsif keyfile.is_a? Hash
+        when Hash
           update_from_hash keyfile, options
         else
           update_from_filepath keyfile, options
         end
         CredentialsLoader.warn_if_cloud_sdk_credentials @client.client_id
@@ -501,13 +502,15 @@
                               .configure_connection(connection_options)
       end
 
       # returns a new Hash with string keys instead of symbol keys.
       def stringify_hash_keys hash
-        Hash[hash.map { |k, v| [k.to_s, v] }]
+        hash.to_h.transform_keys(&:to_s)
       end
 
+      # rubocop:disable Metrics/AbcSize
+
       def client_options options
         # Keyfile options have higher priority over constructor defaults
         options["token_credential_uri"] ||= self.class.token_credential_uri
         options["audience"] ||= self.class.audience
         options["scope"] ||= self.class.scope
@@ -524,9 +527,11 @@
           scope:                (needs_scope ? Array(options["scope"]) : nil),
           target_audience:      options["target_audience"],
           issuer:               options["client_email"],
           signing_key:          OpenSSL::PKey::RSA.new(options["private_key"]) }
       end
+
+      # rubocop:enable Metrics/AbcSize
 
       def update_from_signet client
         @project_id ||= client.project_id if client.respond_to? :project_id
         @quota_project_id ||= client.quota_project_id if client.respond_to? :quota_project_id
         @client = client