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require File.expand_path('../../../spec_helper', __FILE__)
require 'matrix'
describe "Matrix.symmetric?" do
it "returns true for a symmetric Matrix" do
Matrix[[1, 2, Complex(0, 3)], [2, 4, 5], [Complex(0, 3), 5, 6]].symmetric?.should be_true
end
it "returns true for a 0x0 empty matrix" do
Matrix.empty.symmetric?.should be_true
end
it "returns false for an asymmetric Matrix" do
Matrix[[1, 2],[-2, 1]].symmetric?.should be_false
end
it "raises an error for rectangular matrices" do
[
Matrix[[0], [0]],
Matrix[[0, 0]],
Matrix.empty(0, 2),
Matrix.empty(2, 0),
].each do |rectangular_matrix|
lambda {
rectangular_matrix.symmetric?
}.should raise_error(Matrix::ErrDimensionMismatch)
end
end
end
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