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

ruby_version_is "1.9.3" do
  describe "Matrix::EigenvalueDecomposition#eigenvectors" do
    it "returns an array of complex eigenvectors for a rotation matrix" do
      # Fix me: should test for linearity, not for equality
      Matrix[[ 1, 1],
             [-1, 1]].eigensystem.eigenvectors.should ==
      [ Vector[1, Complex(0, 1)],
        Vector[Complex(0, -1), 1]
      ]
    end

    it "returns an array of real eigenvectors for a symetric matrix" do
      # Fix me: should test for linearity, not for equality
      Matrix[[1, 2],
             [2, 1]].eigensystem.eigenvectors.should ==
      [ Vector[0.7071067811865475, -0.7071067811865475],
        Vector[0.7071067811865475, 0.7071067811865475]
      ]
    end
  end
end