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require File.expand_path('../../../../spec_helper', __FILE__)
require 'set'
describe "SortedSet#divide" do
it "divides self into a set of subsets based on the blocks return values" do
set = SortedSet["one", "two", "three", "four", "five"].divide { |x| x.length }
set.map { |x| x.to_a }.to_a.sort.should == [["five", "four"], ["one", "two"], ["three"]]
end
it "yields each Object in self in sorted order" do
ret = []
SortedSet["one", "two", "three", "four", "five"].divide { |x| ret << x }
ret.should == ["one", "two", "three", "four", "five"].sort
end
# BUG: Does not raise a LocalJumpError, but a NoMethodError
#
# it "raises a LocalJumpError when not passed a block" do
# lambda { SortedSet[1].divide }.should raise_error(LocalJumpError)
# end
end
describe "SortedSet#divide when passed a block with an arity of 2" do
it "divides self into a set of subsets based on the blocks return values" do
set = SortedSet[1, 3, 4, 6, 9, 10, 11].divide { |x, y| (x - y).abs == 1 }
set.map { |x| x.to_a }.to_a.sort.should == [[1], [3, 4], [6], [9, 10, 11]]
end
it "yields each two Objects to the block" do
ret = []
SortedSet[1, 2].divide { |x, y| ret << [x, y] }
ret.should == [[1, 1], [1, 2], [2, 1], [2, 2]]
end
end
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