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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "Module#prepend_features" do
it "is a private method" do
Module.should have_private_instance_method(:prepend_features, true)
end
it "gets called when self is included in another module/class" do
ScratchPad.record []
m = Module.new do
def self.prepend_features(mod)
ScratchPad << mod
end
end
c = Class.new do
prepend m
end
ScratchPad.recorded.should == [c]
end
it "raises an ArgumentError on a cyclic prepend" do
-> {
ModuleSpecs::CyclicPrepend.send(:prepend_features, ModuleSpecs::CyclicPrepend)
}.should raise_error(ArgumentError)
end
ruby_version_is ''...'2.7' do
it "copies own tainted status to the given module" do
other = Module.new
Module.new.taint.send :prepend_features, other
other.tainted?.should be_true
end
it "copies own untrusted status to the given module" do
other = Module.new
Module.new.untrust.send :prepend_features, other
other.untrusted?.should be_true
end
end
it "clears caches of the given module" do
parent = Class.new do
def bar; :bar; end
end
child = Class.new(parent) do
def foo; :foo; end
def bar; super; end
end
mod = Module.new do
def foo; :fooo; end
end
child.new.foo
child.new.bar
child.prepend(mod)
child.new.bar.should == :bar
end
describe "on Class" do
it "is undefined" do
Class.should_not have_private_instance_method(:prepend_features, true)
end
it "raises a TypeError if calling after rebinded to Class" do
-> {
Module.instance_method(:prepend_features).bind(Class.new).call Module.new
}.should raise_error(TypeError)
end
end
end
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