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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
19 lines
537 B
Ruby
19 lines
537 B
Ruby
require File.expand_path('../../../spec_helper', __FILE__)
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require 'matrix'
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describe "Matrix#rank" do
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it "returns the rank of the Matrix" do
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Matrix[ [7,6], [3,9] ].rank.should == 2
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end
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it "doesn't loop forever" do
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Matrix[ [1,2,3], [4,5,6], [7,8,9] ].rank.should == 2
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Matrix[ [1, 2, 0, 3], [1, -2, 3, 0], [0, 0, 4, 8], [2, 4, 0, 6] ].rank.
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should == 3
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end
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it "works for some easy rectangular matrices" do
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Matrix[[0,0],[0,0],[1,0]].rank.should == 1
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Matrix[[0,1],[0,0],[1,0]].rank.should == 2
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end
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end
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