require_relative '../../../spec_helper'

ruby_version_is ""..."3.1" do
  require 'matrix'

  describe "Matrix::EigenvalueDecomposition#initialize" do
    it "raises an error if argument is not a matrix" do
      -> {
        Matrix::EigenvalueDecomposition.new([[]])
      }.should raise_error(TypeError)
      -> {
        Matrix::EigenvalueDecomposition.new(42)
      }.should raise_error(TypeError)
    end

    it "raises an error if matrix is not square" do
      -> {
        Matrix::EigenvalueDecomposition.new(Matrix[[1, 2]])
      }.should raise_error(Matrix::ErrDimensionMismatch)
    end

    it "never hangs" do
      m = Matrix[ [0,0,0,0,0], [0,0,0,0,1], [0,0,0,1,0], [1,1,0,0,1], [1,0,1,0,1] ]
      Matrix::EigenvalueDecomposition.new(m).should_not == "infinite loop"
    end
  end
end