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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
33 lines
878 B
Ruby
33 lines
878 B
Ruby
require File.expand_path('../../../../spec_helper', __FILE__)
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require 'matrix'
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describe "Matrix::LUPDecomposition#to_a" do
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before :each do
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@a = Matrix[[7, 8, 9], [14, 46, 51], [28, 82, 163]]
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@lu = Matrix::LUPDecomposition.new(@a)
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@to_a = @lu.to_a
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@l, @u, @p = @to_a
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end
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it "returns an array of three matrices" do
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@to_a.should be_kind_of(Array)
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@to_a.length.should == 3
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@to_a.each{|m| m.should be_kind_of(Matrix)}
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end
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it "returns [l, u, p] such that l*u == a*p" do
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(@l * @u).should == (@p * @a)
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end
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it "returns the right values for rectangular matrices" do
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[
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Matrix[[7, 8, 9], [14, 46, 51]],
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Matrix[[4, 11], [5, 8], [3, 4]],
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].each do |a|
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l, u, p = Matrix::LUPDecomposition.new(a).to_a
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(l * u).should == (p * a)
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end
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end
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it "has other properties implied by the specs of #l, #u and #p"
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end
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