Fixed test [skip ci]

Author: ankane

test/where_test.rb

@@ -88,6 +88,7 @@ def test_where_relation
 
     # multiple where
     assert_search_relation ["Product A"], Product.search("product").where(in_stock: true).where(backordered: true)
+    assert_search_relation [], Product.search("product").where(in_stock: true).where(in_stock: false)
 
     # rewhere
     assert_search_relation ["Product A", "Product C"], Product.search("product").where(in_stock: true).rewhere(backordered: true)
@@ -101,10 +102,6 @@ def test_where_relation
     assert_search_relation ["Product B", "Product C"], Product.search("product").where(_or: [{in_stock: true}, {backordered: true}]).where(_or: [{store_id: 2}, {orders_count: 2}])
   end
 
-  def test_where_relation_additive
-    assert_search_relation [], Product.search("product").where(in_stock: true).where(in_stock: false)
-  end
-
   def test_where_string_operators
     error = assert_raises(ArgumentError) do
       assert_search "product", [], where: {store_id: {"lt" => 2}}