spec/ruby/library/matrix/vector/cross_product_spec.rb


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

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

  describe "Vector#cross_product" do
    it "returns the cross product of a vector" do
      Vector[1, 2, 3].cross_product(Vector[0, -4, 5]).should == Vector[22, -5, -4]
    end

    it "raises an error unless both vectors have dimension 3" do
      -> {
        Vector[1, 2, 3].cross_product(Vector[0, -4])
      }.should raise_error(Vector::ErrDimensionMismatch)
    end
  end
end