diff options
Diffstat (limited to 'activesupport/test/core_ext/module_test.rb')
-rw-r--r-- | activesupport/test/core_ext/module_test.rb | 98 |
1 files changed, 85 insertions, 13 deletions
diff --git a/activesupport/test/core_ext/module_test.rb b/activesupport/test/core_ext/module_test.rb index 82249ddd1b..3c49c4d14f 100644 --- a/activesupport/test/core_ext/module_test.rb +++ b/activesupport/test/core_ext/module_test.rb @@ -12,12 +12,6 @@ class Ab Constant3 = "Goodbye World" end -module Xy - class Bc - include One - end -end - module Yz module Zy class Cd @@ -62,8 +56,31 @@ Developer = Struct.new(:client) do delegate :name, :to => :client, :prefix => nil end +Event = Struct.new(:case) do + delegate :foo, :to => :case +end + Tester = Struct.new(:client) do delegate :name, :to => :client, :prefix => false + + def foo; 1; end +end + +Product = Struct.new(:name) do + delegate :name, :to => :manufacturer, :prefix => true + delegate :name, :to => :type, :prefix => true + + def manufacturer + @manufacturer ||= begin + nil.unknown_method + end + end + + def type + @type ||= begin + :thing_without_same_method_name_as_delegated.name + end + end end class ParameterSet @@ -82,6 +99,21 @@ class Name end end +class SideEffect + attr_reader :ints + + delegate :to_i, :to => :shift, :allow_nil => true + delegate :to_s, :to => :shift + + def initialize + @ints = [1, 2, 3] + end + + def shift + @ints.shift + end +end + class ModuleTest < ActiveSupport::TestCase def setup @david = Someone.new("David", Somewhere.new("Paulina", "Chicago")) @@ -171,6 +203,17 @@ class ModuleTest < ActiveSupport::TestCase assert_nil rails.name end + # Ensures with check for nil, not for a falseish target. + def test_delegation_with_allow_nil_and_false_value + project = Project.new(false, false) + assert_raise(NoMethodError) { project.name } + end + + def test_delegation_with_allow_nil_and_invalid_value + rails = Project.new("Rails", "David") + assert_raise(NoMethodError) { rails.name } + end + def test_delegation_with_allow_nil_and_nil_value_and_prefix Project.class_eval do delegate :name, :to => :person, :allow_nil => true, :prefix => true @@ -181,7 +224,7 @@ class ModuleTest < ActiveSupport::TestCase def test_delegation_without_allow_nil_and_nil_value david = Someone.new("David") - assert_raise(RuntimeError) { david.street } + assert_raise(Module::DelegationError) { david.street } end def test_delegation_to_method_that_exists_on_nil @@ -208,6 +251,16 @@ class ModuleTest < ActiveSupport::TestCase end end + def test_delegation_line_number + _, line = Someone.instance_method(:foo).source_location + assert_equal Someone::FAILED_DELEGATE_LINE, line + end + + def test_delegate_line_with_nil + _, line = Someone.instance_method(:bar).source_location + assert_equal Someone::FAILED_DELEGATE_LINE_2, line + end + def test_delegation_exception_backtrace someone = Someone.new("foo", "bar") someone.foo @@ -228,6 +281,26 @@ class ModuleTest < ActiveSupport::TestCase "[#{e.backtrace.inspect}] did not include [#{file_and_line}]" end + def test_delegation_invokes_the_target_exactly_once + se = SideEffect.new + + assert_equal 1, se.to_i + assert_equal [2, 3], se.ints + + assert_equal '2', se.to_s + assert_equal [3], se.ints + end + + def test_delegation_doesnt_mask_nested_no_method_error_on_nil_receiver + product = Product.new('Widget') + + # Nested NoMethodError is a different name from the delegation + assert_raise(NoMethodError) { product.manufacturer_name } + + # Nested NoMethodError is the same name as the delegation + assert_raise(NoMethodError) { product.type_name } + end + def test_parent assert_equal Yz::Zy, Yz::Zy::Cd.parent assert_equal Yz, Yz::Zy.parent @@ -242,12 +315,6 @@ class ModuleTest < ActiveSupport::TestCase def test_local_constants assert_equal %w(Constant1 Constant3), Ab.local_constants.sort.map(&:to_s) end - - def test_local_constant_names - ActiveSupport::Deprecation.silence do - assert_equal %w(Constant1 Constant3), Ab.local_constant_names.sort.map(&:to_s) - end - end end module BarMethodAliaser @@ -434,4 +501,9 @@ class MethodAliasingTest < ActiveSupport::TestCase assert_equal 'duck_with_orange', @instance.duck assert FooClassWithBarMethod.public_method_defined?(:duck) end + + def test_delegate_with_case + event = Event.new(Tester.new) + assert_equal 1, event.foo + end end |