1 files changed, 118 insertions, 0 deletions
diff --git a/activerecord/test/cases/attributes/typecasting_test.rb b/activerecord/test/cases/attributes/typecasting_test.rb
new file mode 100644
index 0000000000..c712f224b2
--- /dev/null
+++ b/activerecord/test/cases/attributes/typecasting_test.rb
@@ -0,0 +1,118 @@
+require "cases/helper"
+
+class TypecastingTest < ActiveRecord::TestCase
+
+  class TypecastingAttributes < Hash
+    include ActiveRecord::Attributes::Typecasting
+  end
+
+  module MockType
+    class Object
+
+      def cast(value)
+        value
+      end
+
+      def precast(value)
+        value
+      end
+
+      def boolean(value)
+        !value.blank?
+      end
+
+      def appendable?
+        false
+      end
+
+    end
+
+    class Integer < Object
+
+      def cast(value)
+        value.to_i
+      end
+
+      def precast(value)
+        value ? value : 0
+      end
+
+      def boolean(value)
+        !Float(value).zero?
+      end
+
+    end
+
+    class Serialize < Object
+
+      def cast(value)
+        YAML::load(value) rescue value
+      end
+
+      def precast(value)
+        value
+      end
+
+      def appendable?
+        true
+      end
+
+    end
+  end
+
+  def setup
+    @attributes = TypecastingAttributes.new
+    @attributes.types.default = MockType::Object.new
+    @attributes.types['comments_count'] = MockType::Integer.new
+  end
+
+  test "typecast on read" do
+    attributes = @attributes.merge('comments_count' => '5')
+    assert_equal 5, attributes['comments_count']
+  end
+
+  test "typecast on write" do
+    @attributes['comments_count'] = false
+
+    assert_equal 0, @attributes.to_h['comments_count']
+  end
+
+  test "serialized objects" do
+    attributes = @attributes.merge('tags' => [ 'peanut butter' ].to_yaml)
+    attributes.types['tags'] = MockType::Serialize.new
+    attributes['tags'] << 'jelly'
+
+    assert_equal [ 'peanut butter', 'jelly' ], attributes['tags']
+  end
+
+  test "without typecasting" do
+    attributes = @attributes.without_typecast
+    attributes['comments_count'] = '5'
+
+    assert_equal '5', attributes['comments_count']
+  end
+
+  test "typecast all attributes" do
+    attributes = @attributes.merge('title' => 'I love sandwiches', 'comments_count' => '5')
+    attributes.typecast!
+
+    assert_equal({ 'title' => 'I love sandwiches', 'comments_count' => 5 }, attributes)
+  end
+
+  test "query for has? value" do
+    attributes = @attributes.merge('comments_count' => '1')
+
+    assert_equal true,  attributes.has?('comments_count')
+    attributes['comments_count'] = '0'
+    assert_equal false,  attributes.has?('comments_count')
+  end
+
+  test "attributes to Hash" do
+    attributes_hash = { 'title' => 'I love sandwiches', 'comments_count' => '5' }
+    attributes = @attributes.merge(attributes_hash)
+
+    assert_equal Hash, attributes.to_h.class
+    assert_equal attributes_hash, attributes.to_h
+  end
+
+end