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require File.expand_path('../../../../spec_helper', __FILE__)
require 'matrix'
ruby_version_is "2.1.0" do
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 "accepts an array parameter" do
Vector[1, 2, 3].cross_product([0, -4, 5]).should == Vector[-22, 5, 4]
end
it "raises an error unless both vectors have dimension 3" do
lambda {
Vector[1, 2, 3].cross_product(Vector[0, -4])
}.should raise_error(Vector::ErrDimensionMismatch)
lambda {
Vector[1, 2].cross_product(Vector[0, 1, 2])
}.should raise_error(Vector::ErrDimensionMismatch)
lambda {
Vector[1, 2].cross_product(Vector[1, 2])
}.should raise_error(Vector::ErrDimensionMismatch)
end
end
end
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