require_relative '../../spec_helper'
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.is_a?(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.instance_of?(MatrixSub)
    end
  end
end
