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22 lines
580 B
Ruby
22 lines
580 B
Ruby
require_relative '../../spec_helper'
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ruby_version_is ""..."3.1" do
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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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end
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