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-rw-r--r--activerecord/test/cases/attribute_test.rb172
1 files changed, 172 insertions, 0 deletions
diff --git a/activerecord/test/cases/attribute_test.rb b/activerecord/test/cases/attribute_test.rb
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index 0000000000..7b325abf1d
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+++ b/activerecord/test/cases/attribute_test.rb
@@ -0,0 +1,172 @@
+require 'cases/helper'
+require 'minitest/mock'
+
+module ActiveRecord
+ class AttributeTest < ActiveRecord::TestCase
+ setup do
+ @type = Minitest::Mock.new
+ end
+
+ teardown do
+ assert @type.verify
+ end
+
+ test "from_database + read type casts from database" do
+ @type.expect(:type_cast_from_database, 'type cast from database', ['a value'])
+ attribute = Attribute.from_database(nil, 'a value', @type)
+
+ type_cast_value = attribute.value
+
+ assert_equal 'type cast from database', type_cast_value
+ end
+
+ test "from_user + read type casts from user" do
+ @type.expect(:type_cast_from_user, 'type cast from user', ['a value'])
+ attribute = Attribute.from_user(nil, 'a value', @type)
+
+ type_cast_value = attribute.value
+
+ assert_equal 'type cast from user', type_cast_value
+ end
+
+ test "reading memoizes the value" do
+ @type.expect(:type_cast_from_database, 'from the database', ['whatever'])
+ attribute = Attribute.from_database(nil, 'whatever', @type)
+
+ type_cast_value = attribute.value
+ second_read = attribute.value
+
+ assert_equal 'from the database', type_cast_value
+ assert_same type_cast_value, second_read
+ end
+
+ test "reading memoizes falsy values" do
+ @type.expect(:type_cast_from_database, false, ['whatever'])
+ attribute = Attribute.from_database(nil, 'whatever', @type)
+
+ attribute.value
+ attribute.value
+ end
+
+ test "read_before_typecast returns the given value" do
+ attribute = Attribute.from_database(nil, 'raw value', @type)
+
+ raw_value = attribute.value_before_type_cast
+
+ assert_equal 'raw value', raw_value
+ end
+
+ test "from_database + read_for_database type casts to and from database" do
+ @type.expect(:type_cast_from_database, 'read from database', ['whatever'])
+ @type.expect(:type_cast_for_database, 'ready for database', ['read from database'])
+ attribute = Attribute.from_database(nil, 'whatever', @type)
+
+ type_cast_for_database = attribute.value_for_database
+
+ assert_equal 'ready for database', type_cast_for_database
+ end
+
+ test "from_user + read_for_database type casts from the user to the database" do
+ @type.expect(:type_cast_from_user, 'read from user', ['whatever'])
+ @type.expect(:type_cast_for_database, 'ready for database', ['read from user'])
+ attribute = Attribute.from_user(nil, 'whatever', @type)
+
+ type_cast_for_database = attribute.value_for_database
+
+ assert_equal 'ready for database', type_cast_for_database
+ end
+
+ test "duping dups the value" do
+ @type.expect(:type_cast_from_database, 'type cast', ['a value'])
+ attribute = Attribute.from_database(nil, 'a value', @type)
+
+ value_from_orig = attribute.value
+ value_from_clone = attribute.dup.value
+ value_from_orig << ' foo'
+
+ assert_equal 'type cast foo', value_from_orig
+ assert_equal 'type cast', value_from_clone
+ end
+
+ test "duping does not dup the value if it is not dupable" do
+ @type.expect(:type_cast_from_database, false, ['a value'])
+ attribute = Attribute.from_database(nil, 'a value', @type)
+
+ assert_same attribute.value, attribute.dup.value
+ end
+
+ test "duping does not eagerly type cast if we have not yet type cast" do
+ attribute = Attribute.from_database(nil, 'a value', @type)
+ attribute.dup
+ end
+
+ class MyType
+ def type_cast_from_user(value)
+ value + " from user"
+ end
+
+ def type_cast_from_database(value)
+ value + " from database"
+ end
+ end
+
+ test "with_value_from_user returns a new attribute with the value from the user" do
+ old = Attribute.from_database(nil, "old", MyType.new)
+ new = old.with_value_from_user("new")
+
+ assert_equal "old from database", old.value
+ assert_equal "new from user", new.value
+ end
+
+ test "with_value_from_database returns a new attribute with the value from the database" do
+ old = Attribute.from_user(nil, "old", MyType.new)
+ new = old.with_value_from_database("new")
+
+ assert_equal "old from user", old.value
+ assert_equal "new from database", new.value
+ end
+
+ test "uninitialized attributes yield their name if a block is given to value" do
+ block = proc { |name| name.to_s + "!" }
+ foo = Attribute.uninitialized(:foo, nil)
+ bar = Attribute.uninitialized(:bar, nil)
+
+ assert_equal "foo!", foo.value(&block)
+ assert_equal "bar!", bar.value(&block)
+ end
+
+ test "uninitialized attributes have no value" do
+ assert_nil Attribute.uninitialized(:foo, nil).value
+ end
+
+ test "attributes equal other attributes with the same constructor arguments" do
+ first = Attribute.from_database(:foo, 1, Type::Integer.new)
+ second = Attribute.from_database(:foo, 1, Type::Integer.new)
+ assert_equal first, second
+ end
+
+ test "attributes do not equal attributes with different names" do
+ first = Attribute.from_database(:foo, 1, Type::Integer.new)
+ second = Attribute.from_database(:bar, 1, Type::Integer.new)
+ assert_not_equal first, second
+ end
+
+ test "attributes do not equal attributes with different types" do
+ first = Attribute.from_database(:foo, 1, Type::Integer.new)
+ second = Attribute.from_database(:foo, 1, Type::Float.new)
+ assert_not_equal first, second
+ end
+
+ test "attributes do not equal attributes with different values" do
+ first = Attribute.from_database(:foo, 1, Type::Integer.new)
+ second = Attribute.from_database(:foo, 2, Type::Integer.new)
+ assert_not_equal first, second
+ end
+
+ test "attributes do not equal attributes of other classes" do
+ first = Attribute.from_database(:foo, 1, Type::Integer.new)
+ second = Attribute.from_user(:foo, 1, Type::Integer.new)
+ assert_not_equal first, second
+ end
+ end
+end