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require_relative '../spec_helper'
describe "The undef keyword" do
describe "undefines a method" do
before :each do
@undef_class = Class.new do
def meth(o); o; end
end
@obj = @undef_class.new
@obj.meth(5).should == 5
end
it "with an identifier" do
@undef_class.class_eval do
undef meth
end
-> { @obj.meth(5) }.should raise_error(NoMethodError)
end
it "with a simple symbol" do
@undef_class.class_eval do
undef :meth
end
-> { @obj.meth(5) }.should raise_error(NoMethodError)
end
it "with a single quoted symbol" do
@undef_class.class_eval do
undef :'meth'
end
-> { @obj.meth(5) }.should raise_error(NoMethodError)
end
it "with a double quoted symbol" do
@undef_class.class_eval do
undef :"meth"
end
-> { @obj.meth(5) }.should raise_error(NoMethodError)
end
it "with an interpolated symbol" do
@undef_class.class_eval do
undef :"#{'meth'}"
end
-> { @obj.meth(5) }.should raise_error(NoMethodError)
end
it "with an interpolated symbol when interpolated expression is not a String literal" do
@undef_class.class_eval do
undef :"#{'meth'.to_sym}"
end
-> { @obj.meth(5) }.should raise_error(NoMethodError)
end
end
it "allows undefining multiple methods at a time" do
undef_multiple = Class.new do
def method1; end
def method2; :nope; end
undef :method1, :method2
end
obj = undef_multiple.new
obj.respond_to?(:method1).should == false
obj.respond_to?(:method2).should == false
end
it "raises a NameError when passed a missing name" do
Class.new do
-> {
undef not_exist
}.should raise_error(NameError) { |e|
# a NameError and not a NoMethodError
e.class.should == NameError
}
end
end
end
|
