instiki/vendor/rails/activesupport/test/dependencies_test.rb

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require File.dirname(__FILE__) + '/abstract_unit'
require 'pp'
module ModuleWithMissing
mattr_accessor :missing_count
def self.const_missing(name)
self.missing_count += 1
name
end
end
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module ModuleWithConstant
InheritedConstant = "Hello"
end
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class DependenciesTest < Test::Unit::TestCase
def teardown
Dependencies.clear
end
def with_loading(*from)
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old_mechanism, Dependencies.mechanism = Dependencies.mechanism, :load
dir = File.dirname(__FILE__)
prior_load_paths = Dependencies.load_paths
Dependencies.load_paths = from.collect { |f| "#{dir}/#{f}" }
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yield
ensure
Dependencies.load_paths = prior_load_paths
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Dependencies.mechanism = old_mechanism
Dependencies.explicitly_unloadable_constants = []
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end
def test_tracking_loaded_files
require_dependency(File.dirname(__FILE__) + "/dependencies/service_one")
require_dependency(File.dirname(__FILE__) + "/dependencies/service_two")
assert_equal 2, Dependencies.loaded.size
end
def test_tracking_identical_loaded_files
require_dependency(File.dirname(__FILE__) + "/dependencies/service_one")
require_dependency(File.dirname(__FILE__) + "/dependencies/service_one")
assert_equal 1, Dependencies.loaded.size
end
def test_missing_dependency_raises_missing_source_file
assert_raises(MissingSourceFile) { require_dependency("missing_service") }
end
def test_missing_association_raises_nothing
assert_nothing_raised { require_association("missing_model") }
end
def test_dependency_which_raises_exception_isnt_added_to_loaded_set
with_loading do
filename = "#{File.dirname(__FILE__)}/dependencies/raises_exception"
$raises_exception_load_count = 0
5.times do |count|
begin
require_dependency filename
flunk 'should have loaded dependencies/raises_exception which raises an exception'
rescue Exception => e
assert_equal 'Loading me failed, so do not add to loaded or history.', e.message
end
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assert_equal count + 1, $raises_exception_load_count
assert !Dependencies.loaded.include?(filename)
assert !Dependencies.history.include?(filename)
end
end
end
def test_warnings_should_be_enabled_on_first_load
with_loading 'dependencies' do
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old_warnings, Dependencies.warnings_on_first_load = Dependencies.warnings_on_first_load, true
filename = "check_warnings"
expanded = File.expand_path("test/dependencies/#{filename}")
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$check_warnings_load_count = 0
assert !Dependencies.loaded.include?(expanded)
assert !Dependencies.history.include?(expanded)
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silence_warnings { require_dependency filename }
assert_equal 1, $check_warnings_load_count
assert_equal true, $checked_verbose, 'On first load warnings should be enabled.'
assert Dependencies.loaded.include?(expanded)
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Dependencies.clear
assert !Dependencies.loaded.include?(expanded)
assert Dependencies.history.include?(expanded)
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silence_warnings { require_dependency filename }
assert_equal 2, $check_warnings_load_count
assert_equal nil, $checked_verbose, 'After first load warnings should be left alone.'
assert Dependencies.loaded.include?(expanded)
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Dependencies.clear
assert !Dependencies.loaded.include?(expanded)
assert Dependencies.history.include?(expanded)
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enable_warnings { require_dependency filename }
assert_equal 3, $check_warnings_load_count
assert_equal true, $checked_verbose, 'After first load warnings should be left alone.'
assert Dependencies.loaded.include?(expanded)
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end
end
def test_mutual_dependencies_dont_infinite_loop
with_loading 'dependencies' do
$mutual_dependencies_count = 0
assert_nothing_raised { require_dependency 'mutual_one' }
assert_equal 2, $mutual_dependencies_count
Dependencies.clear
$mutual_dependencies_count = 0
assert_nothing_raised { require_dependency 'mutual_two' }
assert_equal 2, $mutual_dependencies_count
end
end
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def test_as_load_path
assert_equal '', DependenciesTest.as_load_path
end
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def test_module_loading
with_loading 'autoloading_fixtures' do
assert_kind_of Module, A
assert_kind_of Class, A::B
assert_kind_of Class, A::C::D
assert_kind_of Class, A::C::E::F
end
end
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def test_non_existing_const_raises_name_error
with_loading 'autoloading_fixtures' do
assert_raises(NameError) { DoesNotExist }
assert_raises(NameError) { NoModule::DoesNotExist }
assert_raises(NameError) { A::DoesNotExist }
assert_raises(NameError) { A::B::DoesNotExist }
end
end
def test_directories_manifest_as_modules_unless_const_defined
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with_loading 'autoloading_fixtures' do
assert_kind_of Module, ModuleFolder
Object.send! :remove_const, :ModuleFolder
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end
end
def test_module_with_nested_class
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with_loading 'autoloading_fixtures' do
assert_kind_of Class, ModuleFolder::NestedClass
Object.send! :remove_const, :ModuleFolder
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end
end
def test_module_with_nested_inline_class
with_loading 'autoloading_fixtures' do
assert_kind_of Class, ModuleFolder::InlineClass
Object.send! :remove_const, :ModuleFolder
end
end
def test_directories_may_manifest_as_nested_classes
with_loading 'autoloading_fixtures' do
assert_kind_of Class, ClassFolder
Object.send! :remove_const, :ClassFolder
end
end
def test_class_with_nested_class
with_loading 'autoloading_fixtures' do
assert_kind_of Class, ClassFolder::NestedClass
Object.send! :remove_const, :ClassFolder
end
end
def test_class_with_nested_inline_class
with_loading 'autoloading_fixtures' do
assert_kind_of Class, ClassFolder::InlineClass
Object.send! :remove_const, :ClassFolder
end
end
def test_class_with_nested_inline_subclass_of_parent
with_loading 'autoloading_fixtures' do
assert_kind_of Class, ClassFolder::ClassFolderSubclass
assert_kind_of Class, ClassFolder
assert_equal 'indeed', ClassFolder::ClassFolderSubclass::ConstantInClassFolder
Object.send! :remove_const, :ClassFolder
end
end
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def test_nested_class_can_access_sibling
with_loading 'autoloading_fixtures' do
sibling = ModuleFolder::NestedClass.class_eval "NestedSibling"
assert defined?(ModuleFolder::NestedSibling)
assert_equal ModuleFolder::NestedSibling, sibling
Object.send! :remove_const, :ModuleFolder
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end
end
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def failing_test_access_thru_and_upwards_fails
with_loading 'autoloading_fixtures' do
assert ! defined?(ModuleFolder)
assert_raises(NameError) { ModuleFolder::Object }
assert_raises(NameError) { ModuleFolder::NestedClass::Object }
Object.send! :remove_const, :ModuleFolder
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end
end
def test_non_existing_const_raises_name_error_with_fully_qualified_name
with_loading 'autoloading_fixtures' do
begin
A::DoesNotExist.nil?
flunk "No raise!!"
rescue NameError => e
assert_equal "uninitialized constant A::DoesNotExist", e.message
end
begin
A::B::DoesNotExist.nil?
flunk "No raise!!"
rescue NameError => e
assert_equal "uninitialized constant A::B::DoesNotExist", e.message
end
end
end
def test_smart_name_error_strings
begin
Object.module_eval "ImaginaryObject"
flunk "No raise!!"
rescue NameError => e
assert e.message.include?("uninitialized constant ImaginaryObject")
end
end
def test_loadable_constants_for_path_should_handle_empty_autoloads
assert_equal [], Dependencies.loadable_constants_for_path('hello')
end
def test_loadable_constants_for_path_should_handle_relative_paths
fake_root = 'dependencies'
relative_root = File.dirname(__FILE__) + '/dependencies'
['', '/'].each do |suffix|
with_loading fake_root + suffix do
assert_equal ["A::B"], Dependencies.loadable_constants_for_path(relative_root + '/a/b')
end
end
end
def test_loadable_constants_for_path_should_provide_all_results
fake_root = '/usr/apps/backpack'
with_loading fake_root, fake_root + '/lib' do
root = Dependencies.load_paths.first
assert_equal ["Lib::A::B", "A::B"], Dependencies.loadable_constants_for_path(root + '/lib/a/b')
end
end
def test_loadable_constants_for_path_should_uniq_results
fake_root = '/usr/apps/backpack/lib'
with_loading fake_root, fake_root + '/' do
root = Dependencies.load_paths.first
assert_equal ["A::B"], Dependencies.loadable_constants_for_path(root + '/a/b')
end
end
def test_loadable_constants_with_load_path_without_trailing_slash
path = File.dirname(__FILE__) + '/autoloading_fixtures/class_folder/inline_class.rb'
with_loading 'autoloading_fixtures/class/' do
assert_equal [], Dependencies.loadable_constants_for_path(path)
end
end
def test_qualified_const_defined
assert Dependencies.qualified_const_defined?("Object")
assert Dependencies.qualified_const_defined?("::Object")
assert Dependencies.qualified_const_defined?("::Object::Kernel")
assert Dependencies.qualified_const_defined?("::Object::Dependencies")
assert Dependencies.qualified_const_defined?("::Test::Unit::TestCase")
end
def test_qualified_const_defined_should_not_call_method_missing
ModuleWithMissing.missing_count = 0
assert ! Dependencies.qualified_const_defined?("ModuleWithMissing::A")
assert_equal 0, ModuleWithMissing.missing_count
assert ! Dependencies.qualified_const_defined?("ModuleWithMissing::A::B")
assert_equal 0, ModuleWithMissing.missing_count
end
def test_autoloaded?
with_loading 'autoloading_fixtures' do
assert ! Dependencies.autoloaded?("ModuleFolder")
assert ! Dependencies.autoloaded?("ModuleFolder::NestedClass")
assert Dependencies.autoloaded?(ModuleFolder)
assert Dependencies.autoloaded?("ModuleFolder")
assert ! Dependencies.autoloaded?("ModuleFolder::NestedClass")
assert Dependencies.autoloaded?(ModuleFolder::NestedClass)
assert Dependencies.autoloaded?("ModuleFolder")
assert Dependencies.autoloaded?("ModuleFolder::NestedClass")
assert Dependencies.autoloaded?("::ModuleFolder")
assert Dependencies.autoloaded?(:ModuleFolder)
# Anonymous modules aren't autoloaded.
assert !Dependencies.autoloaded?(Module.new)
nil_name = Module.new
def nil_name.name() nil end
assert !Dependencies.autoloaded?(nil_name)
Object.class_eval { remove_const :ModuleFolder }
end
end
def test_qualified_name_for
assert_equal "A", Dependencies.qualified_name_for(Object, :A)
assert_equal "A", Dependencies.qualified_name_for(:Object, :A)
assert_equal "A", Dependencies.qualified_name_for("Object", :A)
assert_equal "A", Dependencies.qualified_name_for("::Object", :A)
assert_equal "A", Dependencies.qualified_name_for("::Kernel", :A)
assert_equal "Dependencies::A", Dependencies.qualified_name_for(:Dependencies, :A)
assert_equal "Dependencies::A", Dependencies.qualified_name_for(Dependencies, :A)
end
def test_file_search
with_loading 'dependencies' do
root = Dependencies.load_paths.first
assert_equal nil, Dependencies.search_for_file('service_three')
assert_equal nil, Dependencies.search_for_file('service_three.rb')
assert_equal root + '/service_one.rb', Dependencies.search_for_file('service_one')
assert_equal root + '/service_one.rb', Dependencies.search_for_file('service_one.rb')
end
end
def test_file_search_uses_first_in_load_path
with_loading 'dependencies', 'autoloading_fixtures' do
deps, autoload = Dependencies.load_paths
assert_match %r/dependencies/, deps
assert_match %r/autoloading_fixtures/, autoload
assert_equal deps + '/conflict.rb', Dependencies.search_for_file('conflict')
end
with_loading 'autoloading_fixtures', 'dependencies' do
autoload, deps = Dependencies.load_paths
assert_match %r/dependencies/, deps
assert_match %r/autoloading_fixtures/, autoload
assert_equal autoload + '/conflict.rb', Dependencies.search_for_file('conflict')
end
end
def test_custom_const_missing_should_work
Object.module_eval <<-end_eval
module ModuleWithCustomConstMissing
def self.const_missing(name)
const_set name, name.to_s.hash
end
module A
end
end
end_eval
with_loading 'autoloading_fixtures' do
assert_kind_of Integer, ::ModuleWithCustomConstMissing::B
assert_kind_of Module, ::ModuleWithCustomConstMissing::A
assert_kind_of String, ::ModuleWithCustomConstMissing::A::B
end
end
def test_const_missing_should_not_double_load
$counting_loaded_times = 0
with_loading 'autoloading_fixtures' do
require_dependency '././counting_loader'
assert_equal 1, $counting_loaded_times
assert_raises(ArgumentError) { Dependencies.load_missing_constant Object, :CountingLoader }
assert_equal 1, $counting_loaded_times
end
end
def test_const_missing_within_anonymous_module
$counting_loaded_times = 0
m = Module.new
m.module_eval "def a() CountingLoader; end"
extend m
kls = nil
with_loading 'autoloading_fixtures' do
kls = nil
assert_nothing_raised { kls = a }
assert_equal "CountingLoader", kls.name
assert_equal 1, $counting_loaded_times
assert_nothing_raised { kls = a }
assert_equal 1, $counting_loaded_times
end
end
def test_removal_from_tree_should_be_detected
with_loading 'dependencies' do
root = Dependencies.load_paths.first
c = ServiceOne
Dependencies.clear
assert ! defined?(ServiceOne)
begin
Dependencies.load_missing_constant(c, :FakeMissing)
flunk "Expected exception"
rescue ArgumentError => e
assert_match %r{ServiceOne has been removed from the module tree}i, e.message
end
end
end
def test_nested_load_error_isnt_rescued
with_loading 'dependencies' do
assert_raises(MissingSourceFile) do
RequiresNonexistent1
end
end
end
def test_load_once_paths_do_not_add_to_autoloaded_constants
with_loading 'autoloading_fixtures' do
Dependencies.load_once_paths = Dependencies.load_paths.dup
assert ! Dependencies.autoloaded?("ModuleFolder")
assert ! Dependencies.autoloaded?("ModuleFolder::NestedClass")
assert ! Dependencies.autoloaded?(ModuleFolder)
1 if ModuleFolder::NestedClass # 1 if to avoid warning
assert ! Dependencies.autoloaded?(ModuleFolder::NestedClass)
end
ensure
Object.class_eval { remove_const :ModuleFolder }
Dependencies.load_once_paths = []
end
def test_application_should_special_case_application_controller
with_loading 'autoloading_fixtures' do
require_dependency 'application'
assert_equal 10, ApplicationController
assert Dependencies.autoloaded?(:ApplicationController)
end
end
def test_const_missing_on_kernel_should_fallback_to_object
with_loading 'autoloading_fixtures' do
kls = Kernel::E
assert_equal "E", kls.name
assert_equal kls.object_id, Kernel::E.object_id
end
end
def test_preexisting_constants_are_not_marked_as_autoloaded
with_loading 'autoloading_fixtures' do
require_dependency 'e'
assert Dependencies.autoloaded?(:E)
Dependencies.clear
end
Object.const_set :E, Class.new
with_loading 'autoloading_fixtures' do
require_dependency 'e'
assert ! Dependencies.autoloaded?(:E), "E shouldn't be marked autoloaded!"
Dependencies.clear
end
ensure
Object.class_eval { remove_const :E }
end
def test_unloadable
with_loading 'autoloading_fixtures' do
Object.const_set :M, Module.new
M.unloadable
Dependencies.clear
assert ! defined?(M)
Object.const_set :M, Module.new
Dependencies.clear
assert ! defined?(M), "Dependencies should unload unloadable constants each time"
end
end
def test_unloadable_should_fail_with_anonymous_modules
with_loading 'autoloading_fixtures' do
m = Module.new
assert_raises(ArgumentError) { m.unloadable }
end
end
def test_unloadable_should_return_change_flag
with_loading 'autoloading_fixtures' do
Object.const_set :M, Module.new
assert_equal true, M.unloadable
assert_equal false, M.unloadable
end
end
def test_new_contants_in_without_constants
assert_equal [], (Dependencies.new_constants_in(Object) { })
assert Dependencies.constant_watch_stack.empty?
end
def test_new_constants_in_with_a_single_constant
assert_equal ["Hello"], Dependencies.new_constants_in(Object) {
Object.const_set :Hello, 10
}.map(&:to_s)
assert Dependencies.constant_watch_stack.empty?
ensure
Object.class_eval { remove_const :Hello }
end
def test_new_constants_in_with_nesting
outer = Dependencies.new_constants_in(Object) do
Object.const_set :OuterBefore, 10
assert_equal ["Inner"], Dependencies.new_constants_in(Object) {
Object.const_set :Inner, 20
}.map(&:to_s)
Object.const_set :OuterAfter, 30
end
assert_equal ["OuterAfter", "OuterBefore"], outer.sort.map(&:to_s)
assert Dependencies.constant_watch_stack.empty?
ensure
%w(OuterBefore Inner OuterAfter).each do |name|
Object.class_eval { remove_const name if const_defined?(name) }
end
end
def test_new_constants_in_module
Object.const_set :M, Module.new
outer = Dependencies.new_constants_in(M) do
M.const_set :OuterBefore, 10
inner = Dependencies.new_constants_in(M) do
M.const_set :Inner, 20
end
assert_equal ["M::Inner"], inner
M.const_set :OuterAfter, 30
end
assert_equal ["M::OuterAfter", "M::OuterBefore"], outer.sort
assert Dependencies.constant_watch_stack.empty?
ensure
Object.class_eval { remove_const :M }
end
def test_new_constants_in_module_using_name
outer = Dependencies.new_constants_in(:M) do
Object.const_set :M, Module.new
M.const_set :OuterBefore, 10
inner = Dependencies.new_constants_in(:M) do
M.const_set :Inner, 20
end
assert_equal ["M::Inner"], inner
M.const_set :OuterAfter, 30
end
assert_equal ["M::OuterAfter", "M::OuterBefore"], outer.sort
assert Dependencies.constant_watch_stack.empty?
ensure
Object.class_eval { remove_const :M }
end
def test_new_constants_in_with_inherited_constants
m = Dependencies.new_constants_in(:Object) do
Object.class_eval { include ModuleWithConstant }
end
assert_equal [], m
end
def test_file_with_multiple_constants_and_require_dependency
with_loading 'autoloading_fixtures' do
assert ! defined?(MultipleConstantFile)
assert ! defined?(SiblingConstant)
require_dependency 'multiple_constant_file'
assert defined?(MultipleConstantFile)
assert defined?(SiblingConstant)
assert Dependencies.autoloaded?(:MultipleConstantFile)
assert Dependencies.autoloaded?(:SiblingConstant)
Dependencies.clear
assert ! defined?(MultipleConstantFile)
assert ! defined?(SiblingConstant)
end
end
def test_file_with_multiple_constants_and_auto_loading
with_loading 'autoloading_fixtures' do
assert ! defined?(MultipleConstantFile)
assert ! defined?(SiblingConstant)
assert_equal 10, MultipleConstantFile
assert defined?(MultipleConstantFile)
assert defined?(SiblingConstant)
assert Dependencies.autoloaded?(:MultipleConstantFile)
assert Dependencies.autoloaded?(:SiblingConstant)
Dependencies.clear
assert ! defined?(MultipleConstantFile)
assert ! defined?(SiblingConstant)
end
end
def test_nested_file_with_multiple_constants_and_require_dependency
with_loading 'autoloading_fixtures' do
assert ! defined?(ClassFolder::NestedClass)
assert ! defined?(ClassFolder::SiblingClass)
require_dependency 'class_folder/nested_class'
assert defined?(ClassFolder::NestedClass)
assert defined?(ClassFolder::SiblingClass)
assert Dependencies.autoloaded?("ClassFolder::NestedClass")
assert Dependencies.autoloaded?("ClassFolder::SiblingClass")
Dependencies.clear
assert ! defined?(ClassFolder::NestedClass)
assert ! defined?(ClassFolder::SiblingClass)
end
end
def test_nested_file_with_multiple_constants_and_auto_loading
with_loading 'autoloading_fixtures' do
assert ! defined?(ClassFolder::NestedClass)
assert ! defined?(ClassFolder::SiblingClass)
assert_kind_of Class, ClassFolder::NestedClass
assert defined?(ClassFolder::NestedClass)
assert defined?(ClassFolder::SiblingClass)
assert Dependencies.autoloaded?("ClassFolder::NestedClass")
assert Dependencies.autoloaded?("ClassFolder::SiblingClass")
Dependencies.clear
assert ! defined?(ClassFolder::NestedClass)
assert ! defined?(ClassFolder::SiblingClass)
end
end
def test_autoload_doesnt_shadow_no_method_error_with_relative_constant
with_loading 'autoloading_fixtures' do
assert !defined?(::RaisesNoMethodError), "::RaisesNoMethodError is defined but it hasn't been referenced yet!"
2.times do
assert_raise(NoMethodError) { RaisesNoMethodError }
assert !defined?(::RaisesNoMethodError), "::RaisesNoMethodError is defined but it should have failed!"
end
end
ensure
Object.class_eval { remove_const :RaisesNoMethodError if const_defined?(:RaisesNoMethodError) }
end
def test_autoload_doesnt_shadow_no_method_error_with_absolute_constant
with_loading 'autoloading_fixtures' do
assert !defined?(::RaisesNoMethodError), "::RaisesNoMethodError is defined but it hasn't been referenced yet!"
2.times do
assert_raise(NoMethodError) { ::RaisesNoMethodError }
assert !defined?(::RaisesNoMethodError), "::RaisesNoMethodError is defined but it should have failed!"
end
end
ensure
Object.class_eval { remove_const :RaisesNoMethodError if const_defined?(:RaisesNoMethodError) }
end
def test_autoload_doesnt_shadow_name_error
with_loading 'autoloading_fixtures' do
assert !defined?(::RaisesNameError), "::RaisesNameError is defined but it hasn't been referenced yet!"
2.times do
begin
::RaisesNameError.object_id
flunk 'should have raised NameError when autoloaded file referenced FooBarBaz'
rescue NameError => e
assert_equal 'uninitialized constant RaisesNameError::FooBarBaz', e.message
end
assert !defined?(::RaisesNameError), "::RaisesNameError is defined but it should have failed!"
end
assert !defined?(RaisesNameError)
2.times do
assert_raise(NameError) { RaisesNameError }
assert !defined?(::RaisesNameError), "::RaisesNameError is defined but it should have failed!"
end
end
ensure
Object.class_eval { remove_const :RaisesNoMethodError if const_defined?(:RaisesNoMethodError) }
end
def test_remove_constant_handles_double_colon_at_start
Object.const_set 'DeleteMe', Module.new
DeleteMe.const_set 'OrMe', Module.new
Dependencies.remove_constant "::DeleteMe::OrMe"
assert ! defined?(DeleteMe::OrMe)
assert defined?(DeleteMe)
Dependencies.remove_constant "::DeleteMe"
assert ! defined?(DeleteMe)
end
def test_load_once_constants_should_not_be_unloaded
with_loading 'autoloading_fixtures' do
Dependencies.load_once_paths = Dependencies.load_paths
::A.to_s
assert defined?(A)
Dependencies.clear
assert defined?(A)
end
ensure
Dependencies.load_once_paths = []
Object.class_eval { remove_const :A if const_defined?(:A) }
end
def test_load_once_paths_should_behave_when_recursively_loading
with_loading 'dependencies', 'autoloading_fixtures' do
Dependencies.load_once_paths = [Dependencies.load_paths.last]
assert !defined?(CrossSiteDependency)
assert_nothing_raised { CrossSiteDepender.nil? }
assert defined?(CrossSiteDependency)
assert !Dependencies.autoloaded?(CrossSiteDependency),
"CrossSiteDependency shouldn't be marked as autoloaded!"
Dependencies.clear
assert defined?(CrossSiteDependency),
"CrossSiteDependency shouldn't have been unloaded!"
end
ensure
Dependencies.load_once_paths = []
end
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end