1 files changed, 70 insertions, 0 deletions
diff --git a/spec/lib/gitlab/config/entry/validators/nested_array_helpers_spec.rb b/spec/lib/gitlab/config/entry/validators/nested_array_helpers_spec.rb
new file mode 100644
index 00000000000..cd68307e71f
--- /dev/null
+++ b/spec/lib/gitlab/config/entry/validators/nested_array_helpers_spec.rb
@@ -0,0 +1,70 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Config::Entry::Validators::NestedArrayHelpers do
+  let(:config_struct) do
+    Struct.new(:value, keyword_init: true) do
+      include ActiveModel::Validations
+      extend Gitlab::Config::Entry::Validators::NestedArrayHelpers
+
+      validates_each :value do |record, attr, value|
+        unless validate_nested_array(value, 2) { |v| v.is_a?(Integer) }
+          record.errors.add(attr, "is invalid")
+        end
+      end
+    end
+  end
+
+  describe '#validate_nested_array' do
+    let(:config) { config_struct.new(value: value) }
+
+    subject(:errors) { config.errors }
+
+    before do
+      config.valid?
+    end
+
+    context 'with valid values' do
+      context 'with arrays of integers' do
+        let(:value) { [10, 11] }
+
+        it { is_expected.to be_empty }
+      end
+
+      context 'with nested arrays of integers' do
+        let(:value) { [10, [11, 12]] }
+
+        it { is_expected.to be_empty }
+      end
+    end
+
+    context 'with invalid values' do
+      subject(:error_messages) { errors.messages }
+
+      context 'with single integers' do
+        let(:value) { 10 }
+
+        it { is_expected.to eq({ value: ['is invalid'] }) }
+      end
+
+      context 'when it is nested over the limit' do
+        let(:value) { [10, [11, [12]]] }
+
+        it { is_expected.to eq({ value: ['is invalid'] }) }
+      end
+
+      context 'when a value in the array is not valid' do
+        let(:value) { [10, 11.5] }
+
+        it { is_expected.to eq({ value: ['is invalid'] }) }
+      end
+
+      context 'when a value in the nested array is not valid' do
+        let(:value) { [10, [11, 12.5]] }
+
+        it { is_expected.to eq({ value: ['is invalid'] }) }
+      end
+    end
+  end
+end