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

require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
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