Add tests for ActiveRecord::Base::where method

spec/models/product_spec.rb

@@ -32,10 +32,19 @@
     before { FactoryGirl.create(:product, title: 'foobar') }
     subject { described_class.utusemi(:sample) }
 
-    it '::where by alias column' do
+    it '::where by alias column in Hash and String' do
       expect(subject.where(name: 'foobar').count).to eq(1)
     end
 
+    it '::where by alias column in Hash and Array' do
+      FactoryGirl.create(:product, title: 'hoge')
+      expect(subject.where(name: %w(foobar hoge)).count).to eq(2)
+    end
+
+    it '::where by alias column in String' do
+      expect(subject.where('name LIKE ?', 'foo%').count).to eq(1)
+    end
+
     it '::order by alias column' do
       expect { subject.order(:name) }.not_to raise_error
     end