Extract token_file_exists? and load_file

This makes mocking authentication a little easier.

lib/google_auth_bridge.rb

@@ -6,7 +6,7 @@ class GoogleAuthentication
     GOOGLE_REDIRECT_URI = 'urn:ietf:wg:oauth:2.0:oob'
 
     def self.create_from_config_file(scope, file_name, token_file)
-      config = YAML.load_file(file_name)
+      config = load_file(file_name)
       client_id, client_secret = config[:google_client_id], config[:google_client_secret]
       raise InvalidFileFormatError.new(token_file) if client_id.nil? or client_secret.nil?
       GoogleAuthentication.new(
@@ -15,6 +15,10 @@ def self.create_from_config_file(scope, file_name, token_file)
           client_secret,
           token_file)
     end
+
+    def self.load_file(file_name)
+      YAML.load_file(file_name)
+    end
 
     def initialize(scope, client_id, client_secret, token_file)
       @scope = scope
@@ -23,6 +27,10 @@ def initialize(scope, client_id, client_secret, token_file)
       @token_file = token_file
     end
 
+    def token_file_exists?
+      File.exists? @token_file
+    end
+
     def get_tokens(authorization_code=nil)
       client = Google::APIClient.new
       setup_credentials(client, authorization_code)
@@ -38,10 +46,10 @@ def get_auth_url
     end
 
     def load_token_from_file
-      raise FileNotFoundError.new(@token_file) unless File.exists? @token_file
+      raise FileNotFoundError.new(@token_file) unless token_file_exists?
 
       begin
-        token_data = YAML.load_file(@token_file)
+        token_data = GoogleAuthentication.load_file(@token_file)
         token_data[:refresh_token] or raise
       rescue
         raise InvalidFileFormatError.new(@token_file)
@@ -74,7 +82,7 @@ def setup_credentials(client, code)
     end
 
     def refresh_tokens(client)
-      if File.exist? @token_file
+      if token_file_exists?
         client.authorization.update_token!(refresh_token: load_token_from_file)
         tokens = client.authorization.fetch_access_token
       else

lib/google_auth_bridge/version.rb

@@ -1,3 +1,3 @@
 module GoogleAuthenticationBridge
-  VERSION = "0.1.1"
+  VERSION = "0.1.2"
 end