Add VCR and some initial tests

test/test_helpers/vcr_test_helper.rb

@@ -0,0 +1,35 @@
+# To include in those tests that use VCR. It will automatically insert a VCR cassette named after the test. By default,
+# it will run the test in "replay" mode. To switch to record mode, you can either:
+#
+# * Set the environment variable +VCR_RECORD+.
+# * Use +.vcr_record!+ in your test class.
+module VcrTestHelper
+  extend ActiveSupport::Concern
+
+  included do
+    class_attribute :vcr_record
+
+    setup do
+      VCR.insert_cassette "#{self.class.name.tableize.singularize}-#{name}",
+        record: recording? ? :all : :none,
+        preserve_exact_body_bytes: true
+    end
+
+    teardown do
+      VCR.eject_cassette
+    end
+
+    def recording?
+      vcr_record || ENV["VCR_RECORD"]
+    end
+  end
+
+  class_methods do
+    # Use to force record mode at development time: always perform real http interactions and record fixtures
+    def vcr_record!
+      raise "#vcr_record! is meant for dev time. You are not supposed to run it in CI." if ENV["CI"]
+
+      self.vcr_record = true
+    end
+  end
+end