set up VCR for mocking HTTP requests, working on dbadapter class

.gitignore

@@ -20,4 +20,5 @@ vendor/bundle
 # Ignore e-macs backup files
 *~
 
-.byebug_history
\ No newline at end of file
+.byebug_history
+spec/cassettes

Gemfile

@@ -32,6 +32,8 @@ gem 'sdoc', '~> 0.4.0', group: :doc
 # Use Capistrano for deployment
 # gem 'capistrano-rails', group: :development
 
+gem 'httparty'
+
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
   gem 'byebug'
@@ -39,6 +41,9 @@ group :development, :test do
   gem 'rubocop', require: false
   gem 'factory_girl_rails'
   gem 'faker'
+  gem 'vcr'
+  gem 'webmock'
+  gem 'rspec-json_expectations'
 end
 
 group :development, :test do

Gemfile.lock

@@ -36,6 +36,7 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
+    addressable (2.4.0)
     arel (6.0.3)
     ast (2.2.0)
     binding_of_caller (0.7.2)
@@ -51,6 +52,8 @@ GEM
       execjs
     coffee-script-source (1.10.0)
     concurrent-ruby (1.0.2)
+    crack (0.4.3)
+      safe_yaml (~> 1.0.0)
     debug_inspector (0.0.2)
     diff-lcs (1.2.5)
     erubis (2.7.0)
@@ -83,6 +86,10 @@ GEM
     guard-rubocop (1.2.0)
       guard (~> 2.0)
       rubocop (~> 0.20)
+    hashdiff (0.3.0)
+    httparty (0.13.7)
+      json (~> 1.8)
+      multi_xml (>= 0.5.2)
     i18n (0.7.0)
     jbuilder (2.4.1)
       activesupport (>= 3.0.0, < 5.1)
@@ -108,6 +115,7 @@ GEM
     mini_portile2 (2.0.0)
     minitest (5.8.4)
     multi_json (1.12.0)
+    multi_xml (0.5.5)
     nenv (0.3.0)
     nokogiri (1.6.7.2)
       mini_portile2 (~> 2.0.0.rc2)
@@ -164,6 +172,7 @@ GEM
     rspec-expectations (3.4.0)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.4.0)
+    rspec-json_expectations (1.3.0)
     rspec-mocks (3.4.1)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.4.0)
@@ -184,6 +193,7 @@ GEM
       unicode-display_width (~> 1.0, >= 1.0.1)
     ruby-progressbar (1.8.0)
     ruby_dep (1.3.1)
+    safe_yaml (1.0.4)
     sass (3.4.22)
     sass-rails (5.0.4)
       railties (>= 4.0.0, < 5.0)
@@ -219,11 +229,16 @@ GEM
     uglifier (3.0.0)
       execjs (>= 0.3.0, < 3)
     unicode-display_width (1.0.5)
+    vcr (3.0.1)
     web-console (2.3.0)
       activemodel (>= 4.0)
       binding_of_caller (>= 0.7.2)
       railties (>= 4.0)
       sprockets-rails (>= 2.0, < 4.0)
+    webmock (2.0.2)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff
 
 PLATFORMS
   ruby
@@ -236,9 +251,11 @@ DEPENDENCIES
   guard
   guard-rspec
   guard-rubocop
+  httparty
   jbuilder (~> 2.0)
   jquery-rails
   rails (= 4.2.6)
+  rspec-json_expectations
   rspec-rails (~> 3.1)
   rubocop
   sass-rails (~> 5.0)
@@ -250,7 +267,9 @@ DEPENDENCIES
   terminal-notifier-guard
   turbolinks
   uglifier (>= 1.3.0)
+  vcr
   web-console (~> 2.0)
+  webmock
 
 BUNDLED WITH
    1.12.3

app/adapters/db_adapter.rb

+# frozen_string_literal: true
+
+# Wrapper around NilmDB HTTP service
+class DbAdapter
+  include HTTParty
+
+  def initialize(url)
+    @url = url
+  end
+
+  def schema
+    x = self.class.get("#{@url}/stream/list")
+    byebug
+  end
+end

spec/adapters/db_adapter_spec.rb

+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe DbAdapter do
+  it 'retrieves basic schema', :vcr do
+    db = double(url: 'http://archive.wattsworth.net/nilmdb')
+    adapter = DbAdapter.new(db.url)
+    expect(adapter.schema).to include_json(error: true)
+  end
+end

spec/rails_helper.rb

@@ -55,3 +55,10 @@ RSpec.configure do |config|
   # arbitrary gems may also be filtered via:
   # config.filter_gems_from_backtrace("gem name")
 end
+
+VCR.configure do |c|
+  c.cassette_library_dir = 'spec/cassettes'
+  c.hook_into :webmock
+  c.configure_rspec_metadata!
+end
+

spec/services/db_folder_agent_spec.rb

@@ -13,7 +13,7 @@ RSpec.describe 'DbFolderAgent' do
 
     it 'adds the given file to the folder' do
       db_folder_agent = DbFolderAgent.new(db_service: db_service,
-                                              db_builder: db_builder)
+                                          db_builder: db_builder)
       db_folder_agent.insert_file(folder: parent_folder, file: new_file)
       expect(new_file.db_folder).to eq(parent_folder)
     end

spec/spec_helper.rb

@@ -16,6 +16,9 @@
 # users commonly want.
 #
 # See http://rubydoc.info/gems/rspec-core/RSpec/Core/Configuration
+
+require 'webmock/rspec'
+
 RSpec.configure do |config|
   # rspec-expectations config goes here. You can use an alternate
   # assertion/expectation library such as wrong or the stdlib/minitest