ruby--ruby/spec/ruby/library/matrix/inspect_spec.rb

require_relative '../../spec_helper'

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

  describe "Matrix#inspect" do

    it "returns a stringified representation of the Matrix" do
      Matrix[ [1,2], [2,1] ].inspect.should == "Matrix[[1, 2], [2, 1]]"
    end

    it "returns 'Matrix.empty(...)' for empty matrices" do
      Matrix[ [], [], [] ].inspect.should == "Matrix.empty(3, 0)"
      Matrix.columns([ [], [], [] ]).inspect.should == "Matrix.empty(0, 3)"
    end

    it "calls inspect on its contents" do
      obj = mock("some_value")
      obj.should_receive(:inspect).and_return("some_value")
      Matrix[ [1, 2], [3, obj] ].inspect.should == "Matrix[[1, 2], [3, some_value]]"
    end

    describe "for a subclass of Matrix" do
      it "returns a string using the subclass' name" do
        MatrixSub.ins.inspect.should == "MatrixSub[[1, 0], [0, 1]]"
      end
    end
  end
end