1 files changed, 32 insertions, 0 deletions
diff --git a/spec/models/user_preference_spec.rb b/spec/models/user_preference_spec.rb
new file mode 100644
index 00000000000..64d9d9a78b4
--- /dev/null
+++ b/spec/models/user_preference_spec.rb
@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe UserPreference do
+  describe '#set_notes_filter' do
+    let(:issuable) { build_stubbed(:issue) }
+    let(:user_preference) { create(:user_preference) }
+    let(:only_comments) { described_class::NOTES_FILTERS[:only_comments] }
+
+    it 'returns updated discussion filter' do
+      filter_name =
+        user_preference.set_notes_filter(only_comments, issuable)
+
+      expect(filter_name).to eq(only_comments)
+    end
+
+    it 'updates discussion filter for issuable class' do
+      user_preference.set_notes_filter(only_comments, issuable)
+
+      expect(user_preference.reload.issue_notes_filter).to eq(only_comments)
+    end
+
+    context 'when notes_filter parameter is invalid' do
+      it 'returns the current notes filter' do
+        user_preference.set_notes_filter(only_comments, issuable)
+
+        expect(user_preference.set_notes_filter(9999, issuable)).to eq(only_comments)
+      end
+    end
+  end
+end