1 files changed, 45 insertions, 0 deletions
diff --git a/spec/finders/projects/topics_finder_spec.rb b/spec/finders/projects/topics_finder_spec.rb
new file mode 100644
index 00000000000..28802c5d49e
--- /dev/null
+++ b/spec/finders/projects/topics_finder_spec.rb
@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Projects::TopicsFinder do
+  let_it_be(:user) { create(:user) }
+
+  let!(:topic1) { create(:topic, name: 'topicB') }
+  let!(:topic2) { create(:topic, name: 'topicC') }
+  let!(:topic3) { create(:topic, name: 'topicA') }
+
+  let!(:project1) { create(:project, namespace: user.namespace, topic_list: 'topicC, topicA, topicB') }
+  let!(:project2) { create(:project, namespace: user.namespace, topic_list: 'topicC, topicA') }
+  let!(:project3) { create(:project, namespace: user.namespace, topic_list: 'topicC') }
+
+  describe '#execute' do
+    it 'returns topics' do
+      topics = described_class.new.execute
+
+      expect(topics).to eq([topic2, topic3, topic1])
+    end
+
+    context 'filter by name' do
+      using RSpec::Parameterized::TableSyntax
+
+      where(:search, :result) do
+        'topic'  | %w[topicC topicA topicB]
+        'pic'    | %w[topicC topicA topicB]
+        'B'      | %w[]
+        'cB'     | %w[]
+        'icB'    | %w[topicB]
+        'topicA' | %w[topicA]
+        'topica' | %w[topicA]
+      end
+
+      with_them do
+        it 'returns filtered topics' do
+          topics = described_class.new(params: { search: search }).execute
+
+          expect(topics.map(&:name)).to eq(result)
+        end
+      end
+    end
+  end
+end