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require File.expand_path('../../../../spec_helper', __FILE__)
require 'set'
ruby_version_is "1.9" do
describe "SortedSet#keep_if" do
before(:each) do
@set = SortedSet["one", "two", "three"]
end
it "yields each Object in self in sorted order" do
ret = []
@set.keep_if { |x| ret << x }
ret.should == ["one", "two", "three"].sort
end
it "keeps every element from self for which the passed block returns true" do
@set.keep_if { |x| x.size != 3 }
@set.to_a.should == ["three"]
end
it "returns self" do
@set.keep_if {}.should equal(@set)
end
it "returns an Enumerator when passed no block" do
enum = @set.keep_if
enum.should be_an_instance_of(enumerator_class)
enum.each { |x| x.size != 3 }
@set.to_a.should == ["three"]
end
end
end
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