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

require File.expand_path('../../../spec_helper', __FILE__)
require 'matrix'

ruby_version_is '2.6' do
  describe "Matrix.reflexive?" do
    it "returns true for a reflexive Matrix" do
      Matrix[[1, 2, 3], [4, 1, 3], [5, 3, 1]].reflexive?.should be_true
    end

    it "returns true for a 0x0 empty matrix" do
      Matrix.empty.reflexive?.should be_true
    end

    it "returns false for a non-reflexive Matrix" do
      Matrix[[1, 1],[2, 2]].reflexive?.should be_false
    end

    it "raises an error for non-square matrices" do
      [
        Matrix[[0], [0]],
        Matrix[[0, 0]],
        Matrix.empty(0, 2),
        Matrix.empty(2, 0),
      ].each do |rectangular_matrix|
        lambda {
          rectangular_matrix.reflexive?
        }.should raise_error(Matrix::ErrDimensionMismatch)
      end
    end
  end
end