1 files changed, 25 insertions, 0 deletions
diff --git a/spec/initializers/cookies_serializer_spec.rb b/spec/initializers/cookies_serializer_spec.rb
new file mode 100644
index 00000000000..6167039d3c2
--- /dev/null
+++ b/spec/initializers/cookies_serializer_spec.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'Cookies serializer initializer' do
+  def load_initializer
+    load Rails.root.join('config/initializers/cookies_serializer.rb')
+  end
+
+  subject { Rails.application.config.action_dispatch.cookies_serializer }
+
+  it 'uses JSON serializer by default' do
+    load_initializer
+
+    expect(subject).to eq(:json)
+  end
+
+  it 'uses the unsafe hybrid serializer when the environment variables is set' do
+    stub_env('USE_UNSAFE_HYBRID_COOKIES', 'true')
+
+    load_initializer
+
+    expect(subject).to eq(:hybrid)
+  end
+end