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require 'tool/decoration'
describe Tool::Decoration do
shared_examples :decorate do
specify "with block" do
method = nil
subject.decorate(-> { 42 }) { |m| method = m }
expect(method).not_to be_nil
expect(subject.new.send(method)).to be == 42
end
specify "without block" do
method = nil
subject.decorate { |m| method = m }
expect(method).to be_nil
subject.send(:define_method, :foo) { }
expect(method).to be == :foo
end
specify "multiple decorations" do
calls = []
subject.decorate { |m| calls << :a }
subject.decorate { |m| calls << :b }
expect(calls).to be_empty
subject.send(:define_method, :foo) { }
expect(calls).to be == [:a, :b]
end
specify "multiple methods" do
calls = []
subject.decorate { |m| calls << :a }
subject.send(:define_method, :foo) { }
subject.send(:define_method, :bar) { }
expect(calls).to be == [:a]
end
end
context "extending a class" do
subject { Class.new.extend(Tool::Decoration) }
include_examples(:decorate)
end
context "including in a module" do
subject { Class.new.extend(Module.new { include Tool::Decoration }) }
include_examples(:decorate)
end
context "including in a module" do
subject do
Class.new(Module) do
def new(*) Object.new.extend(self) end
include Tool::Decoration
end.new
end
include_examples(:decorate)
end
end
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