require_relative '../spec_helper' require_relative '../fixtures/constants' require_relative 'fixtures/constants_sclass' require_relative 'fixtures/constant_visibility' # Read the documentation in fixtures/constants.rb for the guidelines and # rationale for the structure and organization of these specs. describe "Literal (A::X) constant resolution" do describe "with statically assigned constants" do it "searches the immediate class or module scope first" do ConstantSpecs::ClassA::CS_CONST10.should == :const10_10 ConstantSpecs::ModuleA::CS_CONST10.should == :const10_1 ConstantSpecs::ParentA::CS_CONST10.should == :const10_5 ConstantSpecs::ContainerA::CS_CONST10.should == :const10_2 ConstantSpecs::ContainerA::ChildA::CS_CONST10.should == :const10_3 end it "searches a module included in the immediate class before the superclass" do ConstantSpecs::ContainerA::ChildA::CS_CONST15.should == :const15_1 end it "searches the superclass before a module included in the superclass" do ConstantSpecs::ContainerA::ChildA::CS_CONST11.should == :const11_1 end it "searches a module included in the superclass" do ConstantSpecs::ContainerA::ChildA::CS_CONST12.should == :const12_1 end it "searches the superclass chain" do ConstantSpecs::ContainerA::ChildA::CS_CONST13.should == :const13 end it "searches Object if no class or module qualifier is given" do CS_CONST1.should == :const1 CS_CONST10.should == :const10_1 end it "searches Object after searching other scopes" do module ConstantSpecs::SpecAdded1 CS_CONST10.should == :const10_1 end end it "searches Object if a toplevel qualifier (::X) is given" do ::CS_CONST1.should == :const1 ::CS_CONST10.should == :const10_1 end it "does not search the singleton class of the class or module" do lambda do ConstantSpecs::ContainerA::ChildA::CS_CONST14 end.should raise_error(NameError) lambda { ConstantSpecs::CS_CONST14 }.should raise_error(NameError) end end describe "with dynamically assigned constants" do it "searches the immediate class or module scope first" do ConstantSpecs::ClassB::CS_CONST101 = :const101_1 ConstantSpecs::ClassB::CS_CONST101.should == :const101_1 ConstantSpecs::ParentB::CS_CONST101 = :const101_2 ConstantSpecs::ParentB::CS_CONST101.should == :const101_2 ConstantSpecs::ContainerB::CS_CONST101 = :const101_3 ConstantSpecs::ContainerB::CS_CONST101.should == :const101_3 ConstantSpecs::ContainerB::ChildB::CS_CONST101 = :const101_4 ConstantSpecs::ContainerB::ChildB::CS_CONST101.should == :const101_4 ConstantSpecs::ModuleA::CS_CONST101 = :const101_5 ConstantSpecs::ModuleA::CS_CONST101.should == :const101_5 end it "searches a module included in the immediate class before the superclass" do ConstantSpecs::ParentB::CS_CONST102 = :const102_1 ConstantSpecs::ModuleF::CS_CONST102 = :const102_2 ConstantSpecs::ContainerB::ChildB::CS_CONST102.should == :const102_2 end it "searches the superclass before a module included in the superclass" do ConstantSpecs::ModuleE::CS_CONST103 = :const103_1 ConstantSpecs::ParentB::CS_CONST103 = :const103_2 ConstantSpecs::ContainerB::ChildB::CS_CONST103.should == :const103_2 end it "searches a module included in the superclass" do ConstantSpecs::ModuleA::CS_CONST104 = :const104_1 ConstantSpecs::ModuleE::CS_CONST104 = :const104_2 ConstantSpecs::ContainerB::ChildB::CS_CONST104.should == :const104_2 end it "searches the superclass chain" do ConstantSpecs::ModuleA::CS_CONST105 = :const105 ConstantSpecs::ContainerB::ChildB::CS_CONST105.should == :const105 end it "searches Object if no class or module qualifier is given" do CS_CONST106 = :const106 CS_CONST106.should == :const106 end it "searches Object if a toplevel qualifier (::X) is given" do ::CS_CONST107 = :const107 ::CS_CONST107.should == :const107 end it "does not search the singleton class of the class or module" do class << ConstantSpecs::ContainerB::ChildB CS_CONST108 = :const108_1 end lambda do ConstantSpecs::ContainerB::ChildB::CS_CONST108 end.should raise_error(NameError) module ConstantSpecs class << self CS_CONST108 = :const108_2 end end lambda { ConstantSpecs::CS_CONST108 }.should raise_error(NameError) end it "returns the updated value when a constant is reassigned" do ConstantSpecs::ClassB::CS_CONST109 = :const109_1 ConstantSpecs::ClassB::CS_CONST109.should == :const109_1 -> { ConstantSpecs::ClassB::CS_CONST109 = :const109_2 }.should complain(/already initialized constant/) ConstantSpecs::ClassB::CS_CONST109.should == :const109_2 end it "evaluates the right hand side before evaluating a constant path" do mod = Module.new mod.module_eval <<-EOC ConstantSpecsRHS::B = begin module ConstantSpecsRHS; end "hello" end EOC mod::ConstantSpecsRHS::B.should == 'hello' end end it "raises a NameError if no constant is defined in the search path" do lambda { ConstantSpecs::ParentA::CS_CONSTX }.should raise_error(NameError) end it "sends #const_missing to the original class or module scope" do ConstantSpecs::ClassA::CS_CONSTX.should == :CS_CONSTX end it "evaluates the qualifier" do ConstantSpecs.get_const::CS_CONST2.should == :const2 end it "raises a TypeError if a non-class or non-module qualifier is given" do lambda { CS_CONST1::CS_CONST }.should raise_error(TypeError) lambda { 1::CS_CONST }.should raise_error(TypeError) lambda { "mod"::CS_CONST }.should raise_error(TypeError) lambda { false::CS_CONST }.should raise_error(TypeError) end end describe "Constant resolution within methods" do describe "with statically assigned constants" do it "searches the immediate class or module scope first" do ConstantSpecs::ClassA.const10.should == :const10_10 ConstantSpecs::ParentA.const10.should == :const10_5 ConstantSpecs::ContainerA.const10.should == :const10_2 ConstantSpecs::ContainerA::ChildA.const10.should == :const10_3 ConstantSpecs::ClassA.new.const10.should == :const10_10 ConstantSpecs::ParentA.new.const10.should == :const10_5 ConstantSpecs::ContainerA::ChildA.new.const10.should == :const10_3 end it "searches a module included in the immediate class before the superclass" do ConstantSpecs::ContainerA::ChildA.const15.should == :const15_1 ConstantSpecs::ContainerA::ChildA.new.const15.should == :const15_1 end it "searches the superclass before a module included in the superclass" do ConstantSpecs::ContainerA::ChildA.const11.should == :const11_1 ConstantSpecs::ContainerA::ChildA.new.const11.should == :const11_1 end it "searches a module included in the superclass" do ConstantSpecs::ContainerA::ChildA.const12.should == :const12_1 ConstantSpecs::ContainerA::ChildA.new.const12.should == :const12_1 end it "searches the superclass chain" do ConstantSpecs::ContainerA::ChildA.const13.should == :const13 ConstantSpecs::ContainerA::ChildA.new.const13.should == :const13 end it "searches the lexical scope of the method not the receiver's immediate class" do ConstantSpecs::ContainerA::ChildA.const19.should == :const19_1 end it "searches the lexical scope of a singleton method" do ConstantSpecs::CS_CONST18.const17.should == :const17_1 end it "does not search the lexical scope of the caller" do lambda { ConstantSpecs::ClassA.const16 }.should raise_error(NameError) end it "searches the lexical scope of a block" do ConstantSpecs::ClassA.const22.should == :const22_1 end it "searches Object as a lexical scope only if Object is explicitly opened" do ConstantSpecs::ContainerA::ChildA.const20.should == :const20_1 ConstantSpecs::ContainerA::ChildA.const21.should == :const21_1 end it "does not search the lexical scope of qualifying modules" do lambda do ConstantSpecs::ContainerA::ChildA.const23 end.should raise_error(NameError) end end describe "with dynamically assigned constants" do it "searches the immediate class or module scope first" do ConstantSpecs::ModuleA::CS_CONST201 = :const201_1 class ConstantSpecs::ClassB; CS_CONST201 = :const201_2; end ConstantSpecs::ParentB::CS_CONST201 = :const201_3 ConstantSpecs::ContainerB::CS_CONST201 = :const201_4 ConstantSpecs::ContainerB::ChildB::CS_CONST201 = :const201_5 ConstantSpecs::ClassB.const201.should == :const201_2 ConstantSpecs::ParentB.const201.should == :const201_3 ConstantSpecs::ContainerB.const201.should == :const201_4 ConstantSpecs::ContainerB::ChildB.const201.should == :const201_5 ConstantSpecs::ClassB.new.const201.should == :const201_2 ConstantSpecs::ParentB.new.const201.should == :const201_3 ConstantSpecs::ContainerB::ChildB.new.const201.should == :const201_5 end it "searches a module included in the immediate class before the superclass" do ConstantSpecs::ParentB::CS_CONST202 = :const202_2 ConstantSpecs::ContainerB::ChildB::CS_CONST202 = :const202_1 ConstantSpecs::ContainerB::ChildB.const202.should == :const202_1 ConstantSpecs::ContainerB::ChildB.new.const202.should == :const202_1 end it "searches the superclass before a module included in the superclass" do ConstantSpecs::ParentB::CS_CONST203 = :const203_1 ConstantSpecs::ModuleE::CS_CONST203 = :const203_2 ConstantSpecs::ContainerB::ChildB.const203.should == :const203_1 ConstantSpecs::ContainerB::ChildB.new.const203.should == :const203_1 end it "searches a module included in the superclass" do ConstantSpecs::ModuleA::CS_CONST204 = :const204_2 ConstantSpecs::ModuleE::CS_CONST204 = :const204_1 ConstantSpecs::ContainerB::ChildB.const204.should == :const204_1 ConstantSpecs::ContainerB::ChildB.new.const204.should == :const204_1 end it "searches the superclass chain" do ConstantSpecs::ModuleA::CS_CONST205 = :const205 ConstantSpecs::ContainerB::ChildB.const205.should == :const205 ConstantSpecs::ContainerB::ChildB.new.const205.should == :const205 end it "searches the lexical scope of the method not the receiver's immediate class" do ConstantSpecs::ContainerB::ChildB::CS_CONST206 = :const206_2 class ConstantSpecs::ContainerB::ChildB class << self CS_CONST206 = :const206_1 end end ConstantSpecs::ContainerB::ChildB.const206.should == :const206_1 end it "searches the lexical scope of a singleton method" do ConstantSpecs::CS_CONST207 = :const207_1 ConstantSpecs::ClassB::CS_CONST207 = :const207_2 ConstantSpecs::CS_CONST208.const207.should == :const207_1 end it "does not search the lexical scope of the caller" do ConstantSpecs::ClassB::CS_CONST209 = :const209 lambda { ConstantSpecs::ClassB.const209 }.should raise_error(NameError) end it "searches the lexical scope of a block" do ConstantSpecs::ClassB::CS_CONST210 = :const210_1 ConstantSpecs::ParentB::CS_CONST210 = :const210_2 ConstantSpecs::ClassB.const210.should == :const210_1 end it "searches Object as a lexical scope only if Object is explicitly opened" do Object::CS_CONST211 = :const211_1 ConstantSpecs::ParentB::CS_CONST211 = :const211_2 ConstantSpecs::ContainerB::ChildB.const211.should == :const211_1 Object::CS_CONST212 = :const212_2 ConstantSpecs::ParentB::CS_CONST212 = :const212_1 ConstantSpecs::ContainerB::ChildB.const212.should == :const212_1 end it "returns the updated value when a constant is reassigned" do ConstantSpecs::ParentB::CS_CONST213 = :const213_1 ConstantSpecs::ContainerB::ChildB.const213.should == :const213_1 ConstantSpecs::ContainerB::ChildB.new.const213.should == :const213_1 -> { ConstantSpecs::ParentB::CS_CONST213 = :const213_2 }.should complain(/already initialized constant/) ConstantSpecs::ContainerB::ChildB.const213.should == :const213_2 ConstantSpecs::ContainerB::ChildB.new.const213.should == :const213_2 end it "does not search the lexical scope of qualifying modules" do ConstantSpecs::ContainerB::CS_CONST214 = :const214 lambda do ConstantSpecs::ContainerB::ChildB.const214 end.should raise_error(NameError) end end it "raises a NameError if no constant is defined in the search path" do lambda { ConstantSpecs::ParentA.constx }.should raise_error(NameError) end it "sends #const_missing to the original class or module scope" do ConstantSpecs::ClassA.constx.should == :CS_CONSTX ConstantSpecs::ClassA.new.constx.should == :CS_CONSTX end describe "with ||=" do it "assigns a scoped constant if previously undefined" do ConstantSpecs.should_not have_constant(:OpAssignUndefined) module ConstantSpecs OpAssignUndefined ||= 42 end ConstantSpecs::OpAssignUndefined.should == 42 ConstantSpecs::OpAssignUndefinedOutside ||= 42 ConstantSpecs::OpAssignUndefinedOutside.should == 42 ConstantSpecs.send(:remove_const, :OpAssignUndefined) ConstantSpecs.send(:remove_const, :OpAssignUndefinedOutside) end it "assigns a global constant if previously undefined" do OpAssignGlobalUndefined ||= 42 ::OpAssignGlobalUndefinedExplicitScope ||= 42 OpAssignGlobalUndefined.should == 42 ::OpAssignGlobalUndefinedExplicitScope.should == 42 Object.send :remove_const, :OpAssignGlobalUndefined Object.send :remove_const, :OpAssignGlobalUndefinedExplicitScope end end describe "with &&=" do it "re-assigns a scoped constant if already true" do module ConstantSpecs OpAssignTrue = true end suppress_warning do ConstantSpecs::OpAssignTrue &&= 1 end ConstantSpecs::OpAssignTrue.should == 1 ConstantSpecs.send :remove_const, :OpAssignTrue end it "leaves scoped constant if not true" do module ConstantSpecs OpAssignFalse = false end ConstantSpecs::OpAssignFalse &&= 1 ConstantSpecs::OpAssignFalse.should == false ConstantSpecs.send :remove_const, :OpAssignFalse end end end describe "Constant resolution within a singleton class (class << obj)" do it "works like normal classes or modules" do ConstantSpecs::CS_SINGLETON1.foo.should == 1 end ruby_version_is "2.3" do it "uses its own namespace for each object" do a = ConstantSpecs::CS_SINGLETON2[0].foo b = ConstantSpecs::CS_SINGLETON2[1].foo [a, b].should == [1, 2] end it "uses its own namespace for nested modules" do a = ConstantSpecs::CS_SINGLETON3[0].x b = ConstantSpecs::CS_SINGLETON3[1].x a.should_not equal(b) end it "allows nested modules to have proper resolution" do a = ConstantSpecs::CS_SINGLETON4_CLASSES[0].new b = ConstantSpecs::CS_SINGLETON4_CLASSES[1].new [a.foo, b.foo].should == [1, 2] end end end describe "top-level constant lookup" do context "on a class" do ruby_version_is "" ... "2.5" do it "searches Object successfully after searching other scopes" do ->() { String::Hash.should == Hash }.should complain(/toplevel constant Hash referenced by/) end end ruby_version_is "2.5" do it "does not search Object after searching other scopes" do ->() { String::Hash }.should raise_error(NameError) end end end it "searches Object unsuccessfully when searches on a module" do ->() { Enumerable::Hash }.should raise_error(NameError) end end describe "Module#private_constant marked constants" do it "remain private even when updated" do mod = Module.new mod.const_set :Foo, true mod.send :private_constant, :Foo -> { mod.const_set :Foo, false }.should complain(/already initialized constant/) lambda {mod::Foo}.should raise_error(NameError) end describe "in a module" do it "cannot be accessed from outside the module" do lambda do ConstantVisibility::PrivConstModule::PRIVATE_CONSTANT_MODULE end.should raise_error(NameError) end it "cannot be reopened as a module from scope where constant would be private" do lambda do module ConstantVisibility::ModuleContainer::PrivateModule; end end.should raise_error(NameError) end it "cannot be reopened as a class from scope where constant would be private" do lambda do class ConstantVisibility::ModuleContainer::PrivateClass; end end.should raise_error(NameError) end it "can be reopened as a module where constant is not private" do module ::ConstantVisibility::ModuleContainer module PrivateModule X = 1 end PrivateModule::X.should == 1 end end it "can be reopened as a class where constant is not private" do module ::ConstantVisibility::ModuleContainer class PrivateClass X = 1 end PrivateClass::X.should == 1 end end it "is not defined? with A::B form" do defined?(ConstantVisibility::PrivConstModule::PRIVATE_CONSTANT_MODULE).should == nil end it "can be accessed from the module itself" do ConstantVisibility::PrivConstModule.private_constant_from_self.should be_true end it "is defined? from the module itself" do ConstantVisibility::PrivConstModule.defined_from_self.should == "constant" end it "can be accessed from lexical scope" do ConstantVisibility::PrivConstModule::Nested.private_constant_from_scope.should be_true end it "is defined? from lexical scope" do ConstantVisibility::PrivConstModule::Nested.defined_from_scope.should == "constant" end it "can be accessed from classes that include the module" do ConstantVisibility::PrivConstModuleChild.new.private_constant_from_include.should be_true end it "is defined? from classes that include the module" do ConstantVisibility::PrivConstModuleChild.new.defined_from_include.should == "constant" end end describe "in a class" do it "cannot be accessed from outside the class" do lambda do ConstantVisibility::PrivConstClass::PRIVATE_CONSTANT_CLASS end.should raise_error(NameError) end it "cannot be reopened as a module" do lambda do module ConstantVisibility::ClassContainer::PrivateModule; end end.should raise_error(NameError) end it "cannot be reopened as a class" do lambda do class ConstantVisibility::ClassContainer::PrivateClass; end end.should raise_error(NameError) end it "can be reopened as a module where constant is not private" do class ::ConstantVisibility::ClassContainer module PrivateModule X = 1 end PrivateModule::X.should == 1 end end it "can be reopened as a class where constant is not private" do class ::ConstantVisibility::ClassContainer class PrivateClass X = 1 end PrivateClass::X.should == 1 end end it "is not defined? with A::B form" do defined?(ConstantVisibility::PrivConstClass::PRIVATE_CONSTANT_CLASS).should == nil end it "can be accessed from the class itself" do ConstantVisibility::PrivConstClass.private_constant_from_self.should be_true end it "is defined? from the class itself" do ConstantVisibility::PrivConstClass.defined_from_self.should == "constant" end it "can be accessed from lexical scope" do ConstantVisibility::PrivConstClass::Nested.private_constant_from_scope.should be_true end it "is defined? from lexical scope" do ConstantVisibility::PrivConstClass::Nested.defined_from_scope.should == "constant" end it "can be accessed from subclasses" do ConstantVisibility::PrivConstClassChild.new.private_constant_from_subclass.should be_true end it "is defined? from subclasses" do ConstantVisibility::PrivConstClassChild.new.defined_from_subclass.should == "constant" end end describe "in Object" do it "cannot be accessed using ::Const form" do lambda do ::PRIVATE_CONSTANT_IN_OBJECT end.should raise_error(NameError) end it "is not defined? using ::Const form" do defined?(::PRIVATE_CONSTANT_IN_OBJECT).should == nil end it "can be accessed through the normal search" do PRIVATE_CONSTANT_IN_OBJECT.should == true end it "is defined? through the normal search" do defined?(PRIVATE_CONSTANT_IN_OBJECT).should == "constant" end end end describe "Module#public_constant marked constants" do before :each do @module = ConstantVisibility::PrivConstModule.dup end describe "in a module" do it "can be accessed from outside the module" do @module.send :public_constant, :PRIVATE_CONSTANT_MODULE @module::PRIVATE_CONSTANT_MODULE.should == true end it "is defined? with A::B form" do @module.send :public_constant, :PRIVATE_CONSTANT_MODULE defined?(@module::PRIVATE_CONSTANT_MODULE).should == "constant" end end describe "in a class" do before :each do @class = ConstantVisibility::PrivConstClass.dup end it "can be accessed from outside the class" do @class.send :public_constant, :PRIVATE_CONSTANT_CLASS @class::PRIVATE_CONSTANT_CLASS.should == true end it "is defined? with A::B form" do @class.send :public_constant, :PRIVATE_CONSTANT_CLASS defined?(@class::PRIVATE_CONSTANT_CLASS).should == "constant" end end describe "in Object" do after :each do ConstantVisibility.reset_private_constants end it "can be accessed using ::Const form" do Object.send :public_constant, :PRIVATE_CONSTANT_IN_OBJECT ::PRIVATE_CONSTANT_IN_OBJECT.should == true end it "is defined? using ::Const form" do Object.send :public_constant, :PRIVATE_CONSTANT_IN_OBJECT defined?(::PRIVATE_CONSTANT_IN_OBJECT).should == "constant" end end end