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* For easier modifications of ruby/spec by MRI developers. * .gitignore: track changes under spec. * spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec. These files can therefore be updated like any other file in MRI. Instructions are provided in spec/README. [Feature #13156] [ruby-core:79246] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
21 lines
598 B
Ruby
21 lines
598 B
Ruby
require File.expand_path('../../../../spec_helper', __FILE__)
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require 'matrix'
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describe "Matrix::LUPDecomposition#determinant" do
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it "returns the determinant when the matrix is square" do
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a = Matrix[[7, 8, 9], [14, 46, 51], [28, 82, 163]]
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a.lup.determinant.should == 15120 # == a.determinant
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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[[7, 8, 9], [14, 46, 51]],
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Matrix[[7, 8], [14, 46], [28, 82]],
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].each do |m|
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lup = m.lup
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lambda {
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lup.determinant
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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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