feat: Add datafile accessor to config (#268)

* feat: Add datafile accessor to config

Author: oakbani

lib/optimizely/config/datafile_project_config.rb

@@ -24,6 +24,7 @@ class DatafileProjectConfig < ProjectConfig
     RUNNING_EXPERIMENT_STATUS = ['Running'].freeze
     RESERVED_ATTRIBUTE_PREFIX = '$opt_'
 
+    attr_reader :datafile
     attr_reader :account_id
     attr_reader :attributes
     attr_reader :audiences
@@ -62,6 +63,7 @@ def initialize(datafile, logger, error_handler)
 
       config = JSON.parse(datafile)
 
+      @datafile = datafile
       @error_handler = error_handler
       @logger = logger
       @version = config['version']

lib/optimizely/optimizely_config.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-#    Copyright 2019, Optimizely and contributors
+#    Copyright 2019-2020, Optimizely and contributors
 #
 #    Licensed under the Apache License, Version 2.0 (the "License");
 #    you may not use this file except in compliance with the License.
@@ -25,6 +25,7 @@ def config
       experiments_map_object = experiments_map
       features_map = get_features_map(experiments_map_object)
       {
+        'datafile' => @project_config.datafile,
         'experimentsMap' => experiments_map_object,
         'featuresMap' => features_map,
         'revision' => @project_config.revision

lib/optimizely/project_config.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-#    Copyright 2016-2019, Optimizely and contributors
+#    Copyright 2016-2020, Optimizely and contributors
 #
 #    Licensed under the Apache License, Version 2.0 (the "License");
 #    you may not use this file except in compliance with the License.
@@ -20,6 +20,8 @@ class ProjectConfig
     # ProjectConfig is an interface capturing the experiment, variation and feature definitions.
     # The default implementation of ProjectConfig can be found in DatafileProjectConfig.
 
+    def datafile; end
+
     def account_id; end
 
     def attributes; end

spec/config/datafile_project_config_spec.rb

@@ -40,6 +40,7 @@
       variable_to_modify['type'] = 'json'
       variable_to_modify.delete('subType')
 
+      expect(project_config.datafile).to eq(config_body_JSON)
       expect(project_config.account_id).to eq(config_body['accountId'])
       expect(project_config.attributes).to eq(config_body['attributes'])
       expect(project_config.audiences).to eq(config_body['audiences'])

spec/optimizely_config_spec.rb

@@ -94,4 +94,8 @@
   it 'should return correct config revision' do
     expect(project_config.revision).to eq(optimizely_config['revision'])
   end
+
+  it 'should return correct datafile string' do
+    expect(project_config.datafile).to eq(optimizely_config['datafile'])
+  end
 end