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require File.expand_path('../../../../spec_helper', __FILE__)
require 'matrix'
describe "Vector#inner_product" do
it "returns the inner product of a vector" do
Vector[1, 2, 3].inner_product(Vector[0, -4, 5]).should == 7
end
it "returns 0 for empty vectors" do
Vector[].inner_product(Vector[]).should == 0
end
it "raises an error for mismatched vectors" do
lambda {
Vector[1, 2, 3].inner_product(Vector[0, -4])
}.should raise_error(Vector::ErrDimensionMismatch)
end
it "uses the conjugate of its argument" do
Vector[Complex(1,2)].inner_product(Vector[Complex(3,4)]).should == Complex(11, 2)
end
end
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