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-rw-r--r--spec/ruby/core/module/include_spec.rb628
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diff --git a/spec/ruby/core/module/include_spec.rb b/spec/ruby/core/module/include_spec.rb
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+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "Module#include" do
+ it "is a public method" do
+ Module.should have_public_instance_method(:include, false)
+ end
+
+ it "calls #append_features(self) in reversed order on each module" do
+ $appended_modules = []
+
+ m = Module.new do
+ def self.append_features(mod)
+ $appended_modules << [ self, mod ]
+ end
+ end
+
+ m2 = Module.new do
+ def self.append_features(mod)
+ $appended_modules << [ self, mod ]
+ end
+ end
+
+ m3 = Module.new do
+ def self.append_features(mod)
+ $appended_modules << [ self, mod ]
+ end
+ end
+
+ c = Class.new { include(m, m2, m3) }
+
+ $appended_modules.should == [ [ m3, c], [ m2, c ], [ m, c ] ]
+ end
+
+ it "adds all ancestor modules when a previously included module is included again" do
+ ModuleSpecs::MultipleIncludes.ancestors.should include(ModuleSpecs::MA, ModuleSpecs::MB)
+ ModuleSpecs::MB.include(ModuleSpecs::MC)
+ ModuleSpecs::MultipleIncludes.include(ModuleSpecs::MB)
+ ModuleSpecs::MultipleIncludes.ancestors.should include(ModuleSpecs::MA, ModuleSpecs::MB, ModuleSpecs::MC)
+ end
+
+ it "raises a TypeError when the argument is not a Module" do
+ -> { ModuleSpecs::Basic.include(Class.new) }.should raise_error(TypeError)
+ end
+
+ it "does not raise a TypeError when the argument is an instance of a subclass of Module" do
+ class ModuleSpecs::SubclassSpec::AClass
+ end
+ -> { ModuleSpecs::SubclassSpec::AClass.include(ModuleSpecs::Subclass.new) }.should_not raise_error(TypeError)
+ ensure
+ ModuleSpecs::SubclassSpec.send(:remove_const, :AClass)
+ end
+
+ it "raises a TypeError when the argument is a refinement" do
+ refinement = nil
+
+ Module.new do
+ refine String do
+ refinement = self
+ end
+ end
+
+ -> { ModuleSpecs::Basic.include(refinement) }.should raise_error(TypeError, "Cannot include refinement")
+ end
+
+ it "imports constants to modules and classes" do
+ ModuleSpecs::A.constants.should include(:CONSTANT_A)
+ ModuleSpecs::B.constants.should include(:CONSTANT_A, :CONSTANT_B)
+ ModuleSpecs::C.constants.should include(:CONSTANT_A, :CONSTANT_B)
+ end
+
+ it "shadows constants from ancestors" do
+ klass = Class.new
+ klass.include ModuleSpecs::ShadowingOuter::M
+ klass::SHADOW.should == 123
+ klass.include ModuleSpecs::ShadowingOuter::N
+ klass::SHADOW.should == 456
+ end
+
+ it "does not override existing constants in modules and classes" do
+ ModuleSpecs::A::OVERRIDE.should == :a
+ ModuleSpecs::B::OVERRIDE.should == :b
+ ModuleSpecs::C::OVERRIDE.should == :c
+ end
+
+ it "imports instance methods to modules and classes" do
+ ModuleSpecs::A.instance_methods.should include(:ma)
+ ModuleSpecs::B.instance_methods.should include(:ma,:mb)
+ ModuleSpecs::C.instance_methods.should include(:ma,:mb)
+ end
+
+ it "does not import methods to modules and classes" do
+ ModuleSpecs::A.methods.include?(:cma).should == true
+ ModuleSpecs::B.methods.include?(:cma).should == false
+ ModuleSpecs::B.methods.include?(:cmb).should == true
+ ModuleSpecs::C.methods.include?(:cma).should == false
+ ModuleSpecs::C.methods.include?(:cmb).should == false
+ end
+
+ it "attaches the module as the caller's immediate ancestor" do
+ module IncludeSpecsTop
+ def value; 5; end
+ end
+
+ module IncludeSpecsMiddle
+ include IncludeSpecsTop
+ def value; 6; end
+ end
+
+ class IncludeSpecsClass
+ include IncludeSpecsMiddle
+ end
+
+ IncludeSpecsClass.new.value.should == 6
+ end
+
+ it "doesn't include module if it is included in a super class" do
+ module ModuleSpecs::M1
+ module M; end
+ class A; include M; end
+ class B < A; include M; end
+
+ all = [A, B, M]
+
+ (B.ancestors.filter { |a| all.include?(a) }).should == [B, A, M]
+ end
+ end
+
+ it "recursively includes new mixins" do
+ module ModuleSpecs::M1
+ module U; end
+ module V; end
+ module W; end
+ module X; end
+ module Y; end
+ class A; include X; end;
+ class B < A; include U, V, W; end;
+
+ # update V
+ module V; include X, U, Y; end
+
+ # This code used to use Array#& and then compare 2 arrays, but
+ # the ordering from Array#& is undefined, as it uses Hash internally.
+ #
+ # Loop is more verbose, but more explicit in what we're testing.
+
+ anc = B.ancestors
+ [B, U, V, W, A, X].each do |i|
+ anc.include?(i).should be_true
+ end
+
+ class B; include V; end
+
+ # the only new module is Y, it is added after U since it follows U in V mixin list:
+ anc = B.ancestors
+ [B, U, Y, V, W, A, X].each do |i|
+ anc.include?(i).should be_true
+ end
+ end
+ end
+
+ it "preserves ancestor order" do
+ module ModuleSpecs::M2
+ module M1; end
+ module M2; end
+ module M3; include M2; end
+
+ module M2; include M1; end
+ module M3; include M2; end
+
+ M3.ancestors.should == [M3, M2, M1]
+
+ end
+ end
+
+ it "detects cyclic includes" do
+ -> {
+ module ModuleSpecs::M
+ include ModuleSpecs::M
+ end
+ }.should raise_error(ArgumentError)
+ end
+
+ it "doesn't accept no-arguments" do
+ -> {
+ Module.new do
+ include
+ end
+ }.should raise_error(ArgumentError)
+ end
+
+ it "returns the class it's included into" do
+ m = Module.new
+ r = nil
+ c = Class.new { r = include m }
+ r.should == c
+ end
+
+ it "ignores modules it has already included via module mutual inclusion" do
+ module ModuleSpecs::AlreadyInc
+ module M0
+ end
+
+ module M
+ include M0
+ end
+
+ class K
+ include M
+ include M
+ end
+
+ K.ancestors[0].should == K
+ K.ancestors[1].should == M
+ K.ancestors[2].should == M0
+ end
+ end
+
+ it "clears any caches" do
+ module ModuleSpecs::M3
+ module M1
+ def foo
+ :m1
+ end
+ end
+
+ module M2
+ def foo
+ :m2
+ end
+ end
+
+ class C
+ include M1
+
+ def get
+ foo
+ end
+ end
+
+ c = C.new
+ c.get.should == :m1
+
+ class C
+ include M2
+ end
+
+ c.get.should == :m2
+
+ remove_const :C
+ end
+ end
+
+ it "updates the method when an included module is updated" do
+ a_class = Class.new do
+ def foo
+ 'a'
+ end
+ end
+
+ m_module = Module.new
+
+ b_class = Class.new(a_class) do
+ include m_module
+ end
+
+ b = b_class.new
+
+ foo = -> { b.foo }
+
+ foo.call.should == 'a'
+
+ m_module.module_eval do
+ def foo
+ 'm'
+ end
+ end
+
+ foo.call.should == 'm'
+ end
+
+
+ it "updates the method when a module included after a call is later updated" do
+ m_module = Module.new
+ a_class = Class.new do
+ def foo
+ 'a'
+ end
+ end
+ b_class = Class.new(a_class)
+ b = b_class.new
+ foo = -> { b.foo }
+ foo.call.should == 'a'
+
+ b_class.include m_module
+ foo.call.should == 'a'
+
+ m_module.module_eval do
+ def foo
+ "m"
+ end
+ end
+ foo.call.should == 'm'
+ end
+
+ it "updates the method when a nested included module is updated" do
+ a_class = Class.new do
+ def foo
+ 'a'
+ end
+ end
+
+ n_module = Module.new
+
+ m_module = Module.new do
+ include n_module
+ end
+
+ b_class = Class.new(a_class) do
+ include m_module
+ end
+
+ b = b_class.new
+
+ foo = -> { b.foo }
+
+ foo.call.should == 'a'
+
+ n_module.module_eval do
+ def foo
+ 'n'
+ end
+ end
+
+ foo.call.should == 'n'
+ end
+
+ it "updates the method when a new module is included" do
+ a_class = Class.new do
+ def foo
+ 'a'
+ end
+ end
+
+ m_module = Module.new do
+ def foo
+ 'm'
+ end
+ end
+
+ b_class = Class.new(a_class)
+ b = b_class.new
+
+ foo = -> { b.foo }
+
+ foo.call.should == 'a'
+
+ b_class.class_eval do
+ include m_module
+ end
+
+ foo.call.should == 'm'
+ end
+
+ it "updates the method when a new module with nested module is included" do
+ a_class = Class.new do
+ def foo
+ 'a'
+ end
+ end
+
+ n_module = Module.new do
+ def foo
+ 'n'
+ end
+ end
+
+ m_module = Module.new do
+ include n_module
+ end
+
+ b_class = Class.new(a_class)
+ b = b_class.new
+
+ foo = -> { b.foo }
+
+ foo.call.should == 'a'
+
+ b_class.class_eval do
+ include m_module
+ end
+
+ foo.call.should == 'n'
+ end
+
+ it "updates the constant when an included module is updated" do
+ module ModuleSpecs::ConstUpdated
+ module A
+ FOO = 'a'
+ end
+
+ module M
+ end
+
+ module B
+ include A
+ include M
+ def self.foo
+ FOO
+ end
+ end
+
+ B.foo.should == 'a'
+
+ M.const_set(:FOO, 'm')
+ B.foo.should == 'm'
+ end
+ ensure
+ ModuleSpecs.send(:remove_const, :ConstUpdated)
+ end
+
+ it "updates the constant when a module included after a call is later updated" do
+ module ModuleSpecs::ConstLaterUpdated
+ module A
+ FOO = 'a'
+ end
+
+ module B
+ include A
+ def self.foo
+ FOO
+ end
+ end
+
+ B.foo.should == 'a'
+
+ module M
+ end
+ B.include M
+
+ B.foo.should == 'a'
+
+ M.const_set(:FOO, 'm')
+ B.foo.should == 'm'
+ end
+ ensure
+ ModuleSpecs.send(:remove_const, :ConstLaterUpdated)
+ end
+
+ it "updates the constant when a module included in another module after a call is later updated" do
+ module ModuleSpecs::ConstModuleLaterUpdated
+ module A
+ FOO = 'a'
+ end
+
+ module B
+ include A
+ def self.foo
+ FOO
+ end
+ end
+
+ B.foo.should == 'a'
+
+ module M
+ end
+ B.include M
+
+ B.foo.should == 'a'
+
+ M.const_set(:FOO, 'm')
+ B.foo.should == 'm'
+ end
+ ensure
+ ModuleSpecs.send(:remove_const, :ConstModuleLaterUpdated)
+ end
+
+ it "updates the constant when a nested included module is updated" do
+ module ModuleSpecs::ConstUpdatedNestedIncludeUpdated
+ module A
+ FOO = 'a'
+ end
+
+ module N
+ end
+
+ module M
+ include N
+ end
+
+ module B
+ include A
+ include M
+ def self.foo
+ FOO
+ end
+ end
+
+ B.foo.should == 'a'
+
+ N.const_set(:FOO, 'n')
+ B.foo.should == 'n'
+ end
+ ensure
+ ModuleSpecs.send(:remove_const, :ConstUpdatedNestedIncludeUpdated)
+ end
+
+ it "updates the constant when a new module is included" do
+ module ModuleSpecs::ConstUpdatedNewInclude
+ module A
+ FOO = 'a'
+ end
+
+ module M
+ FOO = 'm'
+ end
+
+ module B
+ include A
+ def self.foo
+ FOO
+ end
+ end
+
+ B.foo.should == 'a'
+
+ B.include(M)
+ B.foo.should == 'm'
+ end
+ ensure
+ ModuleSpecs.send(:remove_const, :ConstUpdatedNewInclude)
+ end
+
+ it "updates the constant when a new module with nested module is included" do
+ module ModuleSpecs::ConstUpdatedNestedIncluded
+ module A
+ FOO = 'a'
+ end
+
+ module N
+ FOO = 'n'
+ end
+
+ module M
+ include N
+ end
+
+ module B
+ include A
+ def self.foo
+ FOO
+ end
+ end
+
+ B.foo.should == 'a'
+
+ B.include M
+ B.foo.should == 'n'
+ end
+ ensure
+ ModuleSpecs.send(:remove_const, :ConstUpdatedNestedIncluded)
+ end
+
+ it "overrides a previous super method call" do
+ c1 = Class.new do
+ def foo
+ [:c1]
+ end
+ end
+ c2 = Class.new(c1) do
+ def foo
+ [:c2] + super
+ end
+ end
+ c2.new.foo.should == [:c2, :c1]
+ m = Module.new do
+ def foo
+ [:m1]
+ end
+ end
+ c2.include(m)
+ c2.new.foo.should == [:c2, :m1]
+ end
+
+ it "update a module when a nested module is updated and includes a module on its own" do
+ m1 = Module.new
+ m2 = Module.new do
+ def m2; [:m2]; end
+ end
+ m3 = Module.new do
+ def m3; [:m3]; end
+ end
+ m4 = Module.new do
+ def m4; [:m4]; end
+ end
+ c = Class.new
+
+ c.include(m1)
+ m1.include(m2)
+ m2.include(m3)
+ m3.include(m4)
+
+ c.new.m2.should == [:m2]
+ c.new.m3.should == [:m3]
+ c.new.m4.should == [:m4]
+ end
+end
+
+describe "Module#include?" do
+ it "returns true if the given module is included by self or one of it's ancestors" do
+ ModuleSpecs::Super.include?(ModuleSpecs::Basic).should == true
+ ModuleSpecs::Child.include?(ModuleSpecs::Basic).should == true
+ ModuleSpecs::Child.include?(ModuleSpecs::Super).should == true
+ ModuleSpecs::Child.include?(Kernel).should == true
+
+ ModuleSpecs::Parent.include?(ModuleSpecs::Basic).should == false
+ ModuleSpecs::Basic.include?(ModuleSpecs::Super).should == false
+ end
+
+ it "returns false if given module is equal to self" do
+ ModuleSpecs.include?(ModuleSpecs).should == false
+ end
+
+ it "raises a TypeError when no module was given" do
+ -> { ModuleSpecs::Child.include?("Test") }.should raise_error(TypeError)
+ -> { ModuleSpecs::Child.include?(ModuleSpecs::Parent) }.should raise_error(TypeError)
+ end
+end
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