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* Other ruby implementations use the spec/ruby directory. [Misc #13792] [ruby-core:82287] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
38 lines
961 B
Ruby
38 lines
961 B
Ruby
require 'matrix'
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describe :determinant, shared: true do
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it "returns the determinant of a square Matrix" do
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m = Matrix[ [7,6], [3,9] ]
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m.send(@method).should == 45
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m = Matrix[ [9, 8], [6,5] ]
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m.send(@method).should == -3
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m = Matrix[ [9,8,3], [4,20,5], [1,1,1] ]
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m.send(@method).should == 95
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end
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it "returns the determinant of a single-element Matrix" do
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m = Matrix[ [2] ]
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m.send(@method).should == 2
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end
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it "returns 1 for an empty Matrix" do
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m = Matrix[ ]
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m.send(@method).should == 1
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end
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it "returns the determinant even for Matrices containing 0 as first entry" do
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Matrix[[0,1],[1,0]].send(@method).should == -1
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end
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it "raises an error for rectangular matrices" do
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lambda {
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Matrix[[1], [2], [3]].send(@method)
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}.should raise_error(Matrix::ErrDimensionMismatch)
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lambda {
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Matrix.empty(3,0).send(@method)
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}.should raise_error(Matrix::ErrDimensionMismatch)
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end
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end
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