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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "Module#append_features" do
it "is a private method" do
Module.should have_private_instance_method(:append_features)
end
describe "on Class" do
it "is undefined" do
Class.should_not have_private_instance_method(:append_features, true)
end
it "raises a TypeError if calling after rebinded to Class" do
-> {
Module.instance_method(:append_features).bind(Class.new).call Module.new
}.should raise_error(TypeError)
end
end
it "gets called when self is included in another module/class" do
begin
m = Module.new do
def self.append_features(mod)
$appended_to = mod
end
end
c = Class.new do
include m
end
$appended_to.should == c
ensure
$appended_to = nil
end
end
it "raises an ArgumentError on a cyclic include" do
-> {
ModuleSpecs::CyclicAppendA.send(:append_features, ModuleSpecs::CyclicAppendA)
}.should raise_error(ArgumentError)
-> {
ModuleSpecs::CyclicAppendB.send(:append_features, ModuleSpecs::CyclicAppendA)
}.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 :append_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 :append_features, other
other.untrusted?.should be_true
end
end
describe "when other is frozen" do
before :each do
@receiver = Module.new
@other = Module.new.freeze
end
it "raises a FrozenError before appending self" do
-> { @receiver.send(:append_features, @other) }.should raise_error(FrozenError)
@other.ancestors.should_not include(@receiver)
end
end
end
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