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require File.expand_path('../../../spec_helper', __FILE__)
require 'set'
describe "Set#flatten" do
it "returns a copy of self with each included Set flattened" do
set = Set[1, 2, Set[3, 4, Set[5, 6, Set[7, 8]]], 9, 10]
flattened_set = set.flatten
flattened_set.should_not equal(set)
flattened_set.should == Set[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
end
it "raises an ArgumentError when self is recursive" do
(set = Set[]) << set
lambda { set.flatten }.should raise_error(ArgumentError)
end
end
describe "Set#flatten!" do
it "flattens self" do
set = Set[1, 2, Set[3, 4, Set[5, 6, Set[7, 8]]], 9, 10]
set.flatten!
set.should == Set[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
end
it "returns self when self was modified" do
set = Set[1, 2, Set[3, 4]]
set.flatten!.should equal(set)
end
it "returns nil when self was not modified" do
set = Set[1, 2, 3, 4]
set.flatten!.should be_nil
end
it "raises an ArgumentError when self is recursive" do
(set = Set[]) << set
lambda { set.flatten! }.should raise_error(ArgumentError)
end
end
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