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|
require_relative '../../spec_helper'
require_relative 'fixtures/refine'
describe "Module#refine" do
it "runs its block in an anonymous module" do
inner_self = nil
mod = Module.new do
refine String do
inner_self = self
end
end
mod.should_not == inner_self
inner_self.should be_kind_of(Module)
inner_self.name.should == nil
end
it "uses the same anonymous module for future refines of the same class" do
selves = []
mod = Module.new do
refine String do
selves << self
end
end
mod.module_eval do
refine String do
selves << self
end
end
selves[0].should == selves[1]
end
it "adds methods defined in its block to the anonymous module's public instance methods" do
inner_self = nil
mod = Module.new do
refine String do
def blah
"blah"
end
inner_self = self
end
end
inner_self.public_instance_methods.should include(:blah)
end
it "returns created anonymous module" do
inner_self = nil
result = nil
mod = Module.new do
result = refine String do
inner_self = self
end
end
result.should == inner_self
end
it "raises ArgumentError if not passed an argument" do
-> do
Module.new do
refine {}
end
end.should raise_error(ArgumentError)
end
it "raises TypeError if not passed a class" do
-> do
Module.new do
refine("foo") {}
end
end.should raise_error(TypeError, "wrong argument type String (expected Class or Module)")
end
it "accepts a module as argument" do
inner_self = nil
Module.new do
refine(Enumerable) do
def blah
end
inner_self = self
end
end
inner_self.public_instance_methods.should include(:blah)
end
it "applies refinements to the module" do
refinement = Module.new do
refine(Enumerable) do
def foo?
self.any? ? "yes" : "no"
end
end
end
foo = Class.new do
using refinement
def initialize(items)
@items = items
end
def result
@items.foo?
end
end
foo.new([]).result.should == "no"
foo.new([1]).result.should == "yes"
end
it "raises ArgumentError if not given a block" do
-> do
Module.new do
refine String
end
end.should raise_error(ArgumentError)
end
it "applies refinements to calls in the refine block" do
result = nil
Module.new do
refine(String) do
def foo; "foo"; end
result = "hello".foo
end
end
result.should == "foo"
end
it "doesn't apply refinements outside the refine block" do
Module.new do
refine(String) {def foo; "foo"; end}
-> {
"hello".foo
}.should raise_error(NoMethodError)
end
end
it "does not apply refinements to external scopes not using the module" do
Module.new do
refine(String) {def foo; 'foo'; end}
end
-> {"hello".foo}.should raise_error(NoMethodError)
end
# When defining multiple refinements in the same module,
# inside a refine block all refinements from the same
# module are active when a refined method is called
it "makes available all refinements from the same module" do
refinement = Module.new do
refine Integer do
def to_json_format
to_s
end
end
refine Array do
def to_json_format
"[" + map { |i| i.to_json_format }.join(", ") + "]"
end
end
refine Hash do
def to_json_format
"{" + map { |k, v| k.to_s.dump + ": " + v.to_json_format }.join(", ") + "}"
end
end
end
result = nil
Module.new do
using refinement
result = [{1 => 2}, {3 => 4}].to_json_format
end
result.should == '[{"1": 2}, {"3": 4}]'
end
it "does not make available methods from another refinement module" do
refinery_integer = Module.new do
refine Integer do
def to_json_format
to_s
end
end
end
refinery_array = Module.new do
refine Array do
def to_json_format
"[" + map { |i| i.to_json_format }.join(",") + "]"
end
end
end
result = nil
-> {
Module.new do
using refinery_integer
using refinery_array
[1, 2].to_json_format
end
}.should raise_error(NoMethodError)
end
# method lookup:
# * The prepended modules from the refinement for C
# * The refinement for C
# * The included modules from the refinement for C
# * The prepended modules of C
# * C
# * The included modules of C
describe "method lookup" do
it "looks in the object singleton class first" do
refined_class = ModuleSpecs.build_refined_class
refinement = Module.new do
refine refined_class do
def foo; "foo from refinement"; end
end
end
result = nil
Module.new do
using refinement
obj = refined_class.new
class << obj
def foo; "foo from singleton class"; end
end
result = obj.foo
end
result.should == "foo from singleton class"
end
ruby_version_is ""..."3.2" do
it "looks in the included modules for builtin methods" do
result = ruby_exe(<<-RUBY)
a = Module.new do
def /(other) quo(other) end
end
refinement = Module.new do
refine Integer do
include a
end
end
result = nil
Module.new do
using refinement
result = 1 / 2
end
print result.class
RUBY
result.should == 'Rational'
end
end
it "looks in later included modules of the refined module first" do
a = Module.new do
def foo
"foo from A"
end
end
include_me_later = Module.new do
def foo
"foo from IncludeMeLater"
end
end
c = Class.new do
include a
end
refinement = Module.new do
refine c do; end
end
result = nil
Module.new do
using refinement
c.include include_me_later
result = c.new.foo
end
result.should == "foo from IncludeMeLater"
end
ruby_version_is ""..."3.1" do
it "looks in prepended modules from the refinement first" do
refined_class = ModuleSpecs.build_refined_class
refinement = Module.new do
refine refined_class do
include ModuleSpecs::IncludedModule
prepend ModuleSpecs::PrependedModule
def foo; "foo from refinement"; end
end
end
result = nil
Module.new do
using refinement
result = refined_class.new.foo
end
result.should == "foo from prepended module"
end
it "looks in refinement then" do
refined_class = ModuleSpecs.build_refined_class
refinement = Module.new do
refine(refined_class) do
include ModuleSpecs::IncludedModule
def foo; "foo from refinement"; end
end
end
result = nil
Module.new do
using refinement
result = refined_class.new.foo
end
result.should == "foo from refinement"
end
it "looks in included modules from the refinement then" do
refined_class = ModuleSpecs.build_refined_class
refinement = Module.new do
refine refined_class do
include ModuleSpecs::IncludedModule
end
end
result = nil
Module.new do
using refinement
result = refined_class.new.foo
end
result.should == "foo from included module"
end
end
it "looks in the class then" do
refined_class = ModuleSpecs.build_refined_class
refinement = Module.new do
refine(refined_class) { }
end
result = nil
Module.new do
using refinement
result = refined_class.new.foo
end
result.should == "foo"
end
end
# methods in a subclass have priority over refinements in a superclass
it "does not override methods in subclasses" do
refined_class = ModuleSpecs.build_refined_class
subclass = Class.new(refined_class) do
def foo; "foo from subclass"; end
end
refinement = Module.new do
refine refined_class do
def foo; "foo from refinement"; end
end
end
result = nil
Module.new do
using refinement
result = subclass.new.foo
end
result.should == "foo from subclass"
end
context "for methods accessed indirectly" do
it "is honored by Kernel#send" do
refined_class = ModuleSpecs.build_refined_class
refinement = Module.new do
refine refined_class do
def foo; "foo from refinement"; end
end
end
result = nil
Module.new do
using refinement
result = refined_class.new.send :foo
end
result.should == "foo from refinement"
end
it "is honored by BasicObject#__send__" do
refined_class = ModuleSpecs.build_refined_class
refinement = Module.new do
refine refined_class do
def foo; "foo from refinement"; end
end
end
result = nil
Module.new do
using refinement
result = refined_class.new.__send__ :foo
end
result.should == "foo from refinement"
end
it "is honored by Symbol#to_proc" do
refinement = Module.new do
refine Integer do
def to_s
"(#{super})"
end
end
end
result = nil
Module.new do
using refinement
result = [1, 2, 3].map(&:to_s)
end
result.should == ["(1)", "(2)", "(3)"]
end
it "is honored by Kernel#public_send" do
refined_class = ModuleSpecs.build_refined_class
refinement = Module.new do
refine refined_class do
def foo; "foo from refinement"; end
end
end
result = nil
Module.new do
using refinement
result = refined_class.new.public_send :foo
end
result.should == "foo from refinement"
end
it "is honored by string interpolation" do
refinement = Module.new do
refine Integer do
def to_s
"foo"
end
end
end
result = nil
Module.new do
using refinement
result = "#{1}"
end
result.should == "foo"
end
it "is honored by Kernel#binding" do
refinement = Module.new do
refine String do
def to_s
"hello from refinement"
end
end
end
klass = Class.new do
using refinement
def foo
"foo".to_s
end
def get_binding
binding
end
end
result = Kernel.eval("self.foo()", klass.new.get_binding)
result.should == "hello from refinement"
end
it "is honored by Kernel#method" do
klass = Class.new
refinement = Module.new do
refine klass do
def foo; end
end
end
result = nil
Module.new do
using refinement
result = klass.new.method(:foo).class
end
result.should == Method
end
it "is honored by Kernel#public_method" do
klass = Class.new
refinement = Module.new do
refine klass do
def foo; end
end
end
result = nil
Module.new do
using refinement
result = klass.new.public_method(:foo).class
end
result.should == Method
end
it "is honored by Kernel#instance_method" do
klass = Class.new
refinement = Module.new do
refine klass do
def foo; end
end
end
result = nil
Module.new do
using refinement
result = klass.instance_method(:foo).class
end
result.should == UnboundMethod
end
it "is honored by Kernel#respond_to?" do
klass = Class.new
refinement = Module.new do
refine klass do
def foo; end
end
end
result = nil
Module.new do
using refinement
result = klass.new.respond_to?(:foo)
end
result.should == true
end
it "is honored by &" do
refinement = Module.new do
refine String do
def to_proc(*args)
-> * { 'foo' }
end
end
end
result = nil
Module.new do
using refinement
result = ["hola"].map(&"upcase")
end
result.should == ['foo']
end
end
context "when super is called in a refinement" do
ruby_version_is ""..."3.1" do
it "looks in the included to refinery module" do
refined_class = ModuleSpecs.build_refined_class
refinement = Module.new do
refine refined_class do
include ModuleSpecs::IncludedModule
def foo
super
end
end
end
result = nil
Module.new do
using refinement
result = refined_class.new.foo
end
result.should == "foo from included module"
end
end
it "looks in the refined class" do
refined_class = ModuleSpecs.build_refined_class
refinement = Module.new do
refine refined_class do
def foo
super
end
end
end
result = nil
Module.new do
using refinement
result = refined_class.new.foo
end
result.should == "foo"
end
ruby_version_is ""..."3.1" do
it "looks in the refined class from included module" do
refined_class = ModuleSpecs.build_refined_class(for_super: true)
a = Module.new do
def foo
[:A] + super
end
end
refinement = Module.new do
refine refined_class do
include a
end
end
result = nil
Module.new do
using refinement
result = refined_class.new.foo
end
result.should == [:A, :C]
end
it "looks in the refined ancestors from included module" do
refined_class = ModuleSpecs.build_refined_class(for_super: true)
subclass = Class.new(refined_class)
a = Module.new do
def foo
[:A] + super
end
end
refinement = Module.new do
refine refined_class do
include a
end
end
result = nil
Module.new do
using refinement
result = subclass.new.foo
end
result.should == [:A, :C]
end
end
# super in a method of a refinement invokes the method in the refined
# class even if there is another refinement which has been activated
# in the same context.
it "looks in the refined class first if called from refined method" do
refined_class = ModuleSpecs.build_refined_class(for_super: true)
refinement = Module.new do
refine refined_class do
def foo
[:R1]
end
end
end
refinement_with_super = Module.new do
refine refined_class do
def foo
[:R2] + super
end
end
end
result = nil
Module.new do
using refinement
using refinement_with_super
result = refined_class.new.foo
end
result.should == [:R2, :C]
end
it "looks only in the refined class even if there is another active refinement" do
refined_class = ModuleSpecs.build_refined_class(for_super: true)
refinement = Module.new do
refine refined_class do
def bar
"you cannot see me from super because I belong to another active R"
end
end
end
refinement_with_super = Module.new do
refine refined_class do
def bar
super
end
end
end
Module.new do
using refinement
using refinement_with_super
-> {
refined_class.new.bar
}.should raise_error(NoMethodError)
end
end
ruby_version_is ""..."3.1" do
it "does't have access to active refinements for C from included module" do
refined_class = ModuleSpecs.build_refined_class
a = Module.new do
def foo
super + bar
end
end
refinement = Module.new do
refine refined_class do
include a
def bar
"bar is not seen from A methods"
end
end
end
Module.new do
using refinement
-> {
refined_class.new.foo
}.should raise_error(NameError) { |e| e.name.should == :bar }
end
end
it "does't have access to other active refinements from included module" do
refined_class = ModuleSpecs.build_refined_class
refinement_integer = Module.new do
refine Integer do
def bar
"bar is not seen from A methods"
end
end
end
a = Module.new do
def foo
super + 1.bar
end
end
refinement = Module.new do
refine refined_class do
include a
end
end
Module.new do
using refinement
using refinement_integer
-> {
refined_class.new.foo
}.should raise_error(NameError) { |e| e.name.should == :bar }
end
end
# https://bugs.ruby-lang.org/issues/16977
it "looks in the another active refinement if super called from included modules" do
refined_class = ModuleSpecs.build_refined_class(for_super: true)
a = Module.new do
def foo
[:A] + super
end
end
b = Module.new do
def foo
[:B] + super
end
end
refinement_a = Module.new do
refine refined_class do
include a
end
end
refinement_b = Module.new do
refine refined_class do
include b
end
end
result = nil
Module.new do
using refinement_a
using refinement_b
result = refined_class.new.foo
end
result.should == [:B, :A, :C]
end
it "looks in the current active refinement from included modules" do
refined_class = ModuleSpecs.build_refined_class(for_super: true)
a = Module.new do
def foo
[:A] + super
end
end
b = Module.new do
def foo
[:B] + super
end
end
refinement = Module.new do
refine refined_class do
def foo
[:LAST] + super
end
end
end
refinement_a_b = Module.new do
refine refined_class do
include a
include b
end
end
result = nil
Module.new do
using refinement
using refinement_a_b
result = refined_class.new.foo
end
result.should == [:B, :A, :LAST, :C]
end
it "looks in the lexical scope refinements before other active refinements" do
refined_class = ModuleSpecs.build_refined_class(for_super: true)
refinement_local = Module.new do
refine refined_class do
def foo
[:LOCAL] + super
end
end
end
a = Module.new do
using refinement_local
def foo
[:A] + super
end
end
refinement = Module.new do
refine refined_class do
include a
end
end
result = nil
Module.new do
using refinement
result = refined_class.new.foo
end
result.should == [:A, :LOCAL, :C]
end
end
end
it 'and alias aliases a method within a refinement module, but not outside it' do
Module.new do
using Module.new {
refine Array do
alias :orig_count :count
end
}
[1,2].orig_count.should == 2
end
-> { [1,2].orig_count }.should raise_error(NoMethodError)
end
it 'and alias_method aliases a method within a refinement module, but not outside it' do
Module.new do
using Module.new {
refine Array do
alias_method :orig_count, :count
end
}
[1,2].orig_count.should == 2
end
-> { [1,2].orig_count }.should raise_error(NoMethodError)
end
it "and instance_methods returns a list of methods including those of the refined module" do
methods = Array.instance_methods
methods_2 = []
Module.new do
refine Array do
methods_2 = instance_methods
end
end
methods.should == methods_2
end
# Refinements are inherited by module inclusion.
# That is, using activates all refinements in the ancestors of the specified module.
# Refinements in a descendant have priority over refinements in an ancestor.
context "module inclusion" do
it "activates all refinements from all ancestors" do
refinement_included = Module.new do
refine Integer do
def to_json_format
to_s
end
end
end
refinement = Module.new do
include refinement_included
refine Array do
def to_json_format
"[" + map { |i| i.to_s }.join(", ") + "]"
end
end
end
result = nil
Module.new do
using refinement
result = [5.to_json_format, [1, 2, 3].to_json_format]
end
result.should == ["5", "[1, 2, 3]"]
end
it "overrides methods of ancestors by methods in descendants" do
refinement_included = Module.new do
refine Integer do
def to_json_format
to_s
end
end
end
refinement = Module.new do
include refinement_included
refine Integer do
def to_json_format
"hello from refinement"
end
end
end
result = nil
Module.new do
using refinement
result = 5.to_json_format
end
result.should == "hello from refinement"
end
end
it 'does not list methods defined only in refinement' do
refine_object = Module.new do
refine Object do
def refinement_only_method
end
end
end
spec = self
klass = Class.new { instance_methods.should_not spec.send(:include, :refinement_only_method) }
instance = klass.new
instance.methods.should_not include :refinement_only_method
instance.respond_to?(:refinement_only_method).should == false
-> { instance.method :refinement_only_method }.should raise_error(NameError)
end
end
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