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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
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