require_relative 'helper' require 'set' describe Pry::Method do it "should use String names for compatibility" do klass = Class.new { def hello; end } Pry::Method.new(klass.instance_method(:hello)).name.should == "hello" end describe ".from_str" do it 'should look up instance methods if no methods available and no options provided' do klass = Class.new { def hello; end } meth = Pry::Method.from_str(:hello, Pry.binding_for(klass)) meth.should == klass.instance_method(:hello) end it 'should look up methods if no instance methods available and no options provided' do klass = Class.new { def self.hello; end } meth = Pry::Method.from_str(:hello, Pry.binding_for(klass)) meth.should == klass.method(:hello) end it 'should look up instance methods first even if methods available and no options provided' do klass = Class.new { def hello; end; def self.hello; end } meth = Pry::Method.from_str(:hello, Pry.binding_for(klass)) meth.should == klass.instance_method(:hello) end it 'should look up instance methods if "instance-methods" option provided' do klass = Class.new { def hello; end; def self.hello; end } meth = Pry::Method.from_str(:hello, Pry.binding_for(klass), {"instance-methods" => true}) meth.should == klass.instance_method(:hello) end it 'should look up methods if :methods option provided' do klass = Class.new { def hello; end; def self.hello; end } meth = Pry::Method.from_str(:hello, Pry.binding_for(klass), {:methods => true}) meth.should == klass.method(:hello) end it 'should look up instance methods using the Class#method syntax' do klass = Class.new { def hello; end; def self.hello; end } meth = Pry::Method.from_str("klass#hello", Pry.binding_for(binding)) meth.should == klass.instance_method(:hello) end it 'should look up methods using the object.method syntax' do klass = Class.new { def hello; end; def self.hello; end } meth = Pry::Method.from_str("klass.hello", Pry.binding_for(binding)) meth.should == klass.method(:hello) end it 'should NOT look up instance methods using the Class#method syntax if no instance methods defined' do klass = Class.new { def self.hello; end } meth = Pry::Method.from_str("klass#hello", Pry.binding_for(binding)) meth.should == nil end it 'should NOT look up methods using the object.method syntax if no methods defined' do klass = Class.new { def hello; end } meth = Pry::Method.from_str("klass.hello", Pry.binding_for(binding)) meth.should == nil end it 'should look up methods using klass.new.method syntax' do klass = Class.new { def hello; :hello; end } meth = Pry::Method.from_str("klass.new.hello", Pry.binding_for(binding)) meth.name.should == "hello" end it 'should take care of corner cases like mongo[] e.g Foo::Bar.new[]- issue 998' do klass = Class.new { def []; :hello; end } meth = Pry::Method.from_str("klass.new[]", Pry.binding_for(binding)) meth.name.should == "[]" end it 'should take care of cases like $ mongo[] - issue 998' do f = Class.new { def []; :hello; end }.new meth = Pry::Method.from_str("f[]", Pry.binding_for(binding)) meth.name.should == "[]" end it 'should look up instance methods using klass.meth#method syntax' do klass = Class.new { def self.meth; Class.new; end } meth = Pry::Method.from_str("klass.meth#initialize", Pry.binding_for(binding)) meth.name.should == "initialize" end it 'should look up methods using instance::bar syntax' do klass = Class.new{ def self.meth; Class.new; end } meth = Pry::Method.from_str("klass::meth", Pry.binding_for(binding)) meth.name.should == "meth" end it 'should not raise an exception if receiver does not exist' do expect { Pry::Method.from_str("random_klass.meth", Pry.binding_for(binding)) }.to_not raise_error end end describe '.from_binding' do it 'should be able to pick a method out of a binding' do Pry::Method.from_binding(Class.new{ def self.foo; binding; end }.foo).name.should == "foo" end it 'should NOT find a method from the toplevel binding' do Pry::Method.from_binding(TOPLEVEL_BINDING).should == nil end it "should find methods that have been undef'd" do c = Class.new do def self.bar class << self; undef bar; end binding end end m = Pry::Method.from_binding(c.bar) m.name.should == "bar" end # Our source_location trick doesn't work, due to https://github.com/rubinius/rubinius/issues/953 unless Pry::Helpers::BaseHelpers.rbx? it 'should find the super method correctly' do a = Class.new{ def gag33; binding; end; def self.line; __LINE__; end } b = Class.new(a){ def gag33; super; end } g = b.new.gag33 m = Pry::Method.from_binding(g) m.owner.should == a m.source_line.should == a.line m.name.should == "gag33" end end it 'should find the right method if a super method exists' do a = Class.new{ def gag; binding; end; } b = Class.new(a){ def gag; super; binding; end; def self.line; __LINE__; end } m = Pry::Method.from_binding(b.new.gag) m.owner.should == b m.source_line.should == b.line m.name.should == "gag" end # Temporarily disabled to work around rubinius/rubinius#2871. unless Pry::Helpers::BaseHelpers.rbx? it "should find the right method from a BasicObject" do a = Class.new(BasicObject) { def gag; ::Kernel.binding; end; def self.line; __LINE__; end } m = Pry::Method.from_binding(a.new.gag) m.owner.should == a m.source_file.should == __FILE__ m.source_line.should == a.line end end it 'should find the right method even if it was renamed and replaced' do o = Object.new class << o def borscht "nips" binding end alias paella borscht def borscht() paella end end m = Pry::Method.from_binding(o.borscht) m.source.should == Pry::Method(o.method(:paella)).source end end describe 'super' do it 'should be able to find the super method on a bound method' do a = Class.new{ def rar; 4; end } b = Class.new(a){ def rar; super; end } obj = b.new zuper = Pry::Method(obj.method(:rar)).super zuper.owner.should == a zuper.receiver.should == obj end it 'should be able to find the super method of an unbound method' do a = Class.new{ def rar; 4; end } b = Class.new(a){ def rar; super; end } zuper = Pry::Method(b.instance_method(:rar)).super zuper.owner.should == a end it 'should return nil if no super method exists' do a = Class.new{ def rar; super; end } Pry::Method(a.instance_method(:rar)).super.should == nil end it 'should be able to find super methods defined on modules' do m = Module.new{ def rar; 4; end } a = Class.new{ def rar; super; end; include m } zuper = Pry::Method(a.new.method(:rar)).super zuper.owner.should == m end it 'should be able to find super methods defined on super-classes when there are modules in the way' do a = Class.new{ def rar; 4; end } m = Module.new{ def mooo; 4; end } b = Class.new(a){ def rar; super; end; include m } zuper = Pry::Method(b.new.method(:rar)).super zuper.owner.should == a end it 'should be able to jump up multiple levels of bound method, even through modules' do a = Class.new{ def rar; 4; end } m = Module.new{ def rar; 4; end } b = Class.new(a){ def rar; super; end; include m } zuper = Pry::Method(b.new.method(:rar)).super zuper.owner.should == m zuper.super.owner.should == a end end describe 'all_from_class' do def should_find_method(name) Pry::Method.all_from_class(@class).map(&:name).should include name end it 'should be able to find public instance methods defined in a class' do @class = Class.new{ def meth; 1; end } should_find_method('meth') end it 'should be able to find private and protected instance methods defined in a class' do @class = Class.new { protected; def prot; 1; end; private; def priv; 1; end } should_find_method('priv') should_find_method('prot') end it 'should find methods all the way up to Kernel' do @class = Class.new should_find_method('exit!') end it 'should be able to find instance methods defined in a super-class' do @class = Class.new(Class.new{ def meth; 1; end }) {} should_find_method('meth') end it 'should be able to find instance methods defined in modules included into this class' do @class = Class.new{ include Module.new{ def meth; 1; end; } } should_find_method('meth') end it 'should be able to find instance methods defined in modules included into super-classes' do @class = Class.new(Class.new{ include Module.new{ def meth; 1; end; } }) should_find_method('meth') end it 'should attribute overridden methods to the sub-class' do @class = Class.new(Class.new{ include Module.new{ def meth; 1; end; } }) { def meth; 2; end } Pry::Method.all_from_class(@class).detect{ |x| x.name == 'meth' }.owner.should == @class end it 'should be able to find methods defined on a singleton class' do @class = (class << Object.new; def meth; 1; end; self; end) should_find_method('meth') end it 'should be able to find methods on super-classes when given a singleton class' do @class = (class << Class.new{ def meth; 1; end}.new; self; end) should_find_method('meth') end end describe 'all_from_obj' do describe 'on normal objects' do def should_find_method(name) Pry::Method.all_from_obj(@obj).map(&:name).should include name end it "should find methods defined in the object's class" do @obj = Class.new{ def meth; 1; end }.new should_find_method('meth') end it "should find methods defined in modules included into the object's class" do @obj = Class.new{ include Module.new{ def meth; 1; end } }.new should_find_method('meth') end it "should find methods defined in the object's singleton class" do @obj = Object.new class << @obj; def meth; 1; end; end should_find_method('meth') end it "should find methods in modules included into the object's singleton class" do @obj = Object.new @obj.extend Module.new{ def meth; 1; end } should_find_method('meth') end it "should find methods all the way up to Kernel" do @obj = Object.new should_find_method('exit!') end it "should not find methods defined on the classes singleton class" do @obj = Class.new{ class << self; def meth; 1; end; end }.new Pry::Method.all_from_obj(@obj).map(&:name).should_not include 'meth' end it "should work in the face of an overridden send" do @obj = Class.new{ def meth; 1; end; def send; raise EOFError; end }.new should_find_method('meth') end end describe 'on classes' do def should_find_method(name) Pry::Method.all_from_obj(@class).map(&:name).should include name end it "should find methods defined in the class' singleton class" do @class = Class.new{ class << self; def meth; 1; end; end } should_find_method('meth') end it "should find methods defined on modules extended into the class" do @class = Class.new{ extend Module.new{ def meth; 1; end; } } should_find_method('meth') end it "should find methods defined on the singleton class of super-classes" do @class = Class.new(Class.new{ class << self; def meth; 1; end; end }) should_find_method('meth') end it "should not find methods defined within the class" do @class = Class.new{ def meth; 1; end } Pry::Method.all_from_obj(@obj).map(&:name).should_not include 'meth' end it "should find methods defined on Class" do @class = Class.new should_find_method('allocate') end it "should find methods defined on Kernel" do @class = Class.new should_find_method('exit!') end it "should attribute overridden methods to the sub-class' singleton class" do @class = Class.new(Class.new{ class << self; def meth; 1; end; end }) { class << self; def meth; 1; end; end } Pry::Method.all_from_obj(@class).detect{ |x| x.name == 'meth' }.owner.should == (class << @class; self; end) end it "should attrbute overridden methods to the class not the module" do @class = Class.new { class << self; def meth; 1; end; end; extend Module.new{ def meth; 1; end; } } Pry::Method.all_from_obj(@class).detect{ |x| x.name == 'meth' }.owner.should == (class << @class; self; end) end it "should attribute overridden methods to the relevant singleton class in preference to Class" do @class = Class.new { class << self; def allocate; 1; end; end } Pry::Method.all_from_obj(@class).detect{ |x| x.name == 'allocate' }.owner.should == (class << @class; self; end) end end describe 'method resolution order' do module LS class Top; end class Next < Top; end module M; end module N; include M; end module O; include M; end module P; end class Low < Next; include N; include P; end class Lower < Low; extend N; end class Bottom < Lower; extend O; end end def singleton_class(obj); class << obj; self; end; end it "should look at a class and then its superclass" do Pry::Method.instance_resolution_order(LS::Next).should == [LS::Next] + Pry::Method.instance_resolution_order(LS::Top) end it "should include the included modules between a class and its superclass" do Pry::Method.instance_resolution_order(LS::Low).should == [LS::Low, LS::P, LS::N, LS::M] + Pry::Method.instance_resolution_order(LS::Next) end it "should not include modules extended into the class" do Pry::Method.instance_resolution_order(LS::Bottom).should == [LS::Bottom] + Pry::Method.instance_resolution_order(LS::Lower) end it "should include included modules for Modules" do Pry::Method.instance_resolution_order(LS::O).should == [LS::O, LS::M] end it "should include the singleton class of objects" do obj = LS::Low.new Pry::Method.resolution_order(obj).should == [singleton_class(obj)] + Pry::Method.instance_resolution_order(LS::Low) end it "should not include singleton classes of numbers" do Pry::Method.resolution_order(4).should == Pry::Method.instance_resolution_order(Fixnum) end it "should include singleton classes for classes" do Pry::Method.resolution_order(LS::Low).should == [singleton_class(LS::Low)] + Pry::Method.resolution_order(LS::Next) end it "should include modules included into singleton classes" do Pry::Method.resolution_order(LS::Lower).should == [singleton_class(LS::Lower), LS::N, LS::M] + Pry::Method.resolution_order(LS::Low) end it "should include modules at most once" do Pry::Method.resolution_order(LS::Bottom).count(LS::M).should == 1 end it "should include modules at the point which they would be reached" do Pry::Method.resolution_order(LS::Bottom).should == [singleton_class(LS::Bottom), LS::O] + (Pry::Method.resolution_order(LS::Lower)) end it "should include the Pry::Method.instance_resolution_order of Class after the singleton classes" do Pry::Method.resolution_order(LS::Top).should == [singleton_class(LS::Top), singleton_class(Object), singleton_class(BasicObject), *Pry::Method.instance_resolution_order(Class)] end end end describe 'method_name_from_first_line' do it 'should work in all simple cases' do meth = Pry::Method.new(nil) meth.send(:method_name_from_first_line, "def x").should == "x" meth.send(:method_name_from_first_line, "def self.x").should == "x" meth.send(:method_name_from_first_line, "def ClassName.x").should == "x" meth.send(:method_name_from_first_line, "def obj_name.x").should == "x" end end describe 'method aliases' do before do @class = Class.new { def eat end alias fress eat alias_method :omnomnom, :fress def eruct end } end it 'should be able to find method aliases' do meth = Pry::Method(@class.new.method(:eat)) aliases = Set.new(meth.aliases) aliases.should == Set.new(["fress", "omnomnom"]) end it 'should return an empty Array if cannot find aliases' do meth = Pry::Method(@class.new.method(:eruct)) meth.aliases.should be_empty end it 'should not include the own name in the list of aliases' do meth = Pry::Method(@class.new.method(:eat)) meth.aliases.should_not include "eat" end it 'should find aliases for top-level methods' do # top-level methods get added as private instance methods on Object class Object private def my_top_level_method ; end alias my_other_top_level_method my_top_level_method end meth = Pry::Method.new(method(:my_top_level_method)) meth.aliases.should include 'my_other_top_level_method' class Object remove_method :my_top_level_method end end it 'should be able to find aliases for methods implemented in C' do meth = Pry::Method(Hash.new.method(:key?)) aliases = Set.new(meth.aliases) aliases.should == Set.new(["include?", "member?", "has_key?"]) end end end