Add DataStoreFactory specs

spec/data_store_factory_spec.rb

@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe SimpleMapReduce::DataStoreFactory do
+  describe '.create' do
+    context "with 'default'" do
+      it 'returns DefaultDataStore instance' do
+        store = described_class.create('default')
+        expect(store).to be_a(SimpleMapReduce::DataStores::DefaultDataStore)
+      end
+    end
+
+    context "with 'remote'" do
+      let(:options) do
+        {
+          resource_name: 'jobs',
+          resource_id: '1',
+          server_url: 'http://example.com'
+        }
+      end
+
+      it 'returns RemoteDataStore instance' do
+        store = described_class.create('remote', options)
+        expect(store).to be_a(SimpleMapReduce::DataStores::RemoteDataStore)
+      end
+
+      it 'passes options to RemoteDataStore' do
+        expect(SimpleMapReduce::DataStores::RemoteDataStore).to receive(:new).with(options)
+        described_class.create('remote', options)
+      end
+    end
+
+    context 'with unsupported type' do
+      it 'raises ArgumentError' do
+        expect { described_class.create('foo') }.to raise_error(ArgumentError)
+      end
+    end
+  end
+end