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require "spec_helper"
require "hamster/vector"
describe Hamster::Vector do
describe "#delete" do
it "removes elements that are #== to the argument" do
V[1,2,3].delete(1).should eql(V[2,3])
V[1,2,3].delete(2).should eql(V[1,3])
V[1,2,3].delete(3).should eql(V[1,2])
V[1,2,3].delete(0).should eql(V[1,2,3])
V['a','b','a','c','a','a','d'].delete('a').should eql(V['b','c','d'])
V[EqualNotEql.new, EqualNotEql.new].delete(:something).should eql(V.empty)
V[EqlNotEqual.new, EqlNotEqual.new].delete(:something).should_not be_empty
end
context "on an empty vector" do
it "returns self" do
V.empty.delete(1).should be(V.empty)
end
end
context "on a subclass of Vector" do
it "returns an instance of the subclass" do
subclass = Class.new(Hamster::Vector)
instance = subclass.new([1,2,3])
instance.delete(1).class.should be(subclass)
end
end
end
end
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