Added more tests for JSON

Author: ankane

test/relation_test.rb

@@ -90,6 +90,24 @@ def test_inspect
     assert_match "#<Searchkick::Relation [#<Product", Product.search("product").inspect
   end
 
+  def test_to_json
+    store_names ["Product A", "Product B"]
+    if mongoid?
+      assert_equal Product.all.to_a.to_json, Product.search("product").to_json
+    else
+      assert_equal Product.all.to_json, Product.search("product").to_json
+    end
+  end
+
+  def test_as_json
+    store_names ["Product A", "Product B"]
+    if mongoid?
+      assert_equal Product.all.to_a.as_json, Product.search("product").as_json
+    else
+      assert_equal Product.all.as_json, Product.search("product").as_json
+    end
+  end
+
   def test_to_yaml
     store_names ["Product A", "Product B"]
     if mongoid?