1 files changed, 64 insertions, 0 deletions
diff --git a/spec/lib/gitlab/database/type/symbolized_jsonb_spec.rb b/spec/lib/gitlab/database/type/symbolized_jsonb_spec.rb
new file mode 100644
index 00000000000..a8401667b34
--- /dev/null
+++ b/spec/lib/gitlab/database/type/symbolized_jsonb_spec.rb
@@ -0,0 +1,64 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Database::Type::SymbolizedJsonb do
+  let(:type) { described_class.new }
+
+  describe '#deserialize' do
+    using RSpec::Parameterized::TableSyntax
+
+    subject { type.deserialize(json) }
+
+    where(:json, :value) do
+      nil                                   | nil
+      '{"key":"value"}'                     | { key: 'value' }
+      '{"key":[1,2,3]}'                     | { key: [1, 2, 3] }
+      '{"key":{"subkey":"value"}}'          | { key: { subkey: 'value' } }
+      '{"key":{"a":[{"b":"c"},{"d":"e"}]}}' | { key: { a: [{ b: 'c' }, { d: 'e' }] } }
+    end
+
+    with_them do
+      it { is_expected.to match(value) }
+    end
+  end
+
+  context 'when used by a model' do
+    let(:model) do
+      Class.new(ApplicationRecord) do
+        self.table_name = :_test_symbolized_jsonb
+
+        attribute :options, :sym_jsonb
+      end
+    end
+
+    let(:record) do
+      model.create!(name: 'test', options: { key: 'value' })
+    end
+
+    before do
+      ApplicationRecord.connection.execute(<<~SQL)
+        CREATE TABLE _test_symbolized_jsonb(
+          id serial NOT NULL PRIMARY KEY,
+          name text,
+          options jsonb);
+      SQL
+
+      model.reset_column_information
+    end
+
+    it { expect(record.options).to match({ key: 'value' }) }
+
+    it 'ignores changes to other attributes' do
+      record.name = 'other test'
+
+      expect(record.changes).to match('name' => ['test', 'other test'])
+    end
+
+    it 'tracks changes to options' do
+      record.options = { key: 'other value' }
+
+      expect(record.changes).to match('options' => [{ 'key' => 'value' }, { 'key' => 'other value' }])
+    end
+  end
+end