1 files changed, 82 insertions, 0 deletions
diff --git a/spec/finders/merge_requests/by_approvals_finder_spec.rb b/spec/finders/merge_requests/by_approvals_finder_spec.rb
new file mode 100644
index 00000000000..0e1856879f1
--- /dev/null
+++ b/spec/finders/merge_requests/by_approvals_finder_spec.rb
@@ -0,0 +1,82 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe MergeRequests::ByApprovalsFinder do
+  let_it_be(:first_user) { create(:user) }
+  let_it_be(:second_user) { create(:user) }
+  let(:third_user) { create(:user) }
+
+  let_it_be(:merge_request_without_approvals) { create(:merge_request) }
+  let_it_be(:merge_request_with_first_user_approval) do
+    create(:merge_request).tap do |mr|
+      create(:approval, merge_request: mr, user: first_user)
+    end
+  end
+  let_it_be(:merge_request_with_both_approvals) do
+    create(:merge_request).tap do |mr|
+      create(:approval, merge_request: mr, user: first_user)
+      create(:approval, merge_request: mr, user: second_user)
+    end
+  end
+
+  def merge_requests(ids: nil, names: [])
+    described_class.new(names, ids).execute(MergeRequest.all)
+  end
+
+  context 'filter by no approvals' do
+    it 'returns merge requests without approvals' do
+      expected_result = [merge_request_without_approvals]
+
+      expect(merge_requests(ids: 'None')).to match_array(expected_result)
+      expect(merge_requests(names: ['None'])).to match_array(expected_result)
+    end
+  end
+
+  context 'filter by any approvals' do
+    it 'returns merge requests approved by at least one user' do
+      expected_result = [merge_request_with_first_user_approval, merge_request_with_both_approvals]
+
+      expect(merge_requests(ids: 'Any')).to match_array(expected_result)
+      expect(merge_requests(names: ['Any'])).to match_array(expected_result)
+    end
+  end
+
+  context 'filter by specific user approval' do
+    it 'returns merge requests approved by specific user' do
+      expected_result = [merge_request_with_first_user_approval, merge_request_with_both_approvals]
+
+      expect(merge_requests(ids: [first_user.id])).to match_array(expected_result)
+      expect(merge_requests(names: [first_user.username])).to match_array(expected_result)
+    end
+  end
+
+  context 'filter by multiple user approval' do
+    it 'returns merge requests approved by both users' do
+      expected_result = [merge_request_with_both_approvals]
+
+      expect(merge_requests(ids: [first_user.id, second_user.id])).to match_array(expected_result)
+      expect(merge_requests(names: [first_user.username, second_user.username])).to match_array(expected_result)
+    end
+
+    context 'limiting max conditional elements' do
+      it 'returns merge requests approved by both users, considering limit of 2 being defined' do
+        stub_const('MergeRequests::ByApprovalsFinder::MAX_FILTER_ELEMENTS', 2)
+
+        expected_result = [merge_request_with_both_approvals]
+
+        expect(merge_requests(ids: [first_user.id, second_user.id, third_user.id])).to match_array(expected_result)
+        expect(merge_requests(names: [first_user.username, second_user.username, third_user.username])).to match_array(expected_result)
+      end
+    end
+  end
+
+  context 'with empty params' do
+    it 'returns all merge requests' do
+      expected_result = [merge_request_without_approvals, merge_request_with_first_user_approval, merge_request_with_both_approvals]
+
+      expect(merge_requests(ids: [])).to match_array(expected_result)
+      expect(merge_requests(names: [])).to match_array(expected_result)
+    end
+  end
+end