1 files changed, 26 insertions, 0 deletions
diff --git a/spec/components/pajamas/component_spec.rb b/spec/components/pajamas/component_spec.rb
new file mode 100644
index 00000000000..96f6b43bac1
--- /dev/null
+++ b/spec/components/pajamas/component_spec.rb
@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+require 'spec_helper'
+
+RSpec.describe Pajamas::Component do
+  describe '#filter_attribute' do
+    let(:allowed) { %w[default something] }
+
+    it 'returns default value when no value is given' do
+      value = subject.send(:filter_attribute, nil, allowed, default: 'default')
+
+      expect(value).to eq('default')
+    end
+
+    it 'returns default value when invalid value is given' do
+      value = subject.send(:filter_attribute, 'invalid', allowed, default: 'default')
+
+      expect(value).to eq('default')
+    end
+
+    it 'returns given value when it is part of allowed list' do
+      value = subject.send(:filter_attribute, 'something', allowed, default: 'default')
+
+      expect(value).to eq('something')
+    end
+  end
+end