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401b64c4e8
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62656 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
37 lines
1.1 KiB
Ruby
37 lines
1.1 KiB
Ruby
require_relative '../../spec_helper'
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require 'matrix'
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ruby_version_is "2.6" do
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describe "Matrix#antisymmetric?" do
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it "returns true for an antisymmetric Matrix" do
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Matrix[[0, -2, Complex(1, 3)], [2, 0, 5], [-Complex(1, 3), -5, 0]].antisymmetric?.should be_true
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end
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it "returns true for a 0x0 empty matrix" do
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Matrix.empty.antisymmetric?.should be_true
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end
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it "returns false for non-antisymmetric matrices" do
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[
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Matrix[[1, 2, 3], [4, 5, 6], [7, 8, 9]],
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Matrix[[1, -2, 3], [2, 0, 6], [-3, -6, 0]], # wrong diagonal element
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Matrix[[0, 2, -3], [2, 0, 6], [-3, 6, 0]] # only signs wrong
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].each do |matrix|
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matrix.antisymmetric?.should be_false
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end
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end
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it "raises an error for rectangular matrices" do
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[
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Matrix[[0], [0]],
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Matrix[[0, 0]],
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Matrix.empty(0, 2),
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Matrix.empty(2, 0),
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].each do |rectangular_matrix|
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lambda {
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rectangular_matrix.antisymmetric?
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}.should raise_error(Matrix::ErrDimensionMismatch)
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end
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end
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end
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end
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