spec/ruby/library/matrix/clone_spec.rb


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require_relative '../../spec_helper'

ruby_version_is ""..."3.1" do
  require_relative 'fixtures/classes'
  require 'matrix'

  describe "Matrix#clone" do
    before :each do
      @a = Matrix[[1, 2], [3, 4], [5, 6]]
    end

    it "returns a shallow copy of the matrix" do
      b = @a.clone
      @a.should_not equal(b)
      b.should be_kind_of(Matrix)
      b.should == @a
      0.upto(@a.row_size - 1) do |i|
        @a.row(i).should_not equal(b.row(i))
      end
    end

    describe "for a subclass of Matrix" do
      it "returns an instance of that subclass" do
        MatrixSub.ins.clone.should be_an_instance_of(MatrixSub)
      end
    end
  end
end