[#247] Filters conversation by status and paginate conversations (#284)

* [#247] Filters conversation by status

* Fixes conversation finder specs

* [#248] Paginates conversation

* Use method name in description

* Move page to default param, add filters on frontend

* Fix code climate issues

spec/finders/conversation_finder_spec.rb

@@ -0,0 +1,49 @@
+require 'rails_helper'
+
+describe ::ConversationFinder do
+  subject(:conversation_finder) { described_class.new(user_1, params) }
+
+  let!(:account) { create(:account) }
+  let!(:user_1) { create(:user, account: account) }
+  let!(:user_2) { create(:user, account: account) }
+  let!(:inbox) { create(:inbox, account: account) }
+
+  before do
+    create(:inbox_member, user: user_1, inbox: inbox)
+    create(:inbox_member, user: user_2, inbox: inbox)
+    create(:complete_conversation, account: account, inbox: inbox, assignee: user_1)
+    create(:complete_conversation, account: account, inbox: inbox, assignee: user_1)
+    create(:complete_conversation, account: account, inbox: inbox, assignee: user_1, status: 'resolved')
+    create(:complete_conversation, account: account, inbox: inbox, assignee: user_2)
+  end
+
+  describe '#perform' do
+    context 'with status' do
+      let(:params) { { status: 'open', assignee_type_id: 0 } }
+
+      it 'filter conversations by status' do
+        result = conversation_finder.perform
+        expect(result[:conversations].count).to be 2
+      end
+    end
+
+    context 'with assignee' do
+      let(:params) { { assignee_type_id: 2 } }
+
+      it 'filter conversations by assignee' do
+        result = conversation_finder.perform
+        expect(result[:conversations].count).to be 3
+      end
+    end
+
+    context 'with pagination' do
+      let(:params) { { status: 'open', assignee_type_id: 0, page: 1 } }
+
+      it 'returns paginated conversations' do
+        create_list(:complete_conversation, 50, account: account, inbox: inbox, assignee: user_1)
+        result = conversation_finder.perform
+        expect(result[:conversations].count).to be 25
+      end
+    end
+  end
+end