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32 lines
801 B
Ruby
32 lines
801 B
Ruby
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require File.expand_path('../../../spec_helper', __FILE__)
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require 'matrix'
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describe "Matrix#singular?" do
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it "returns true for singular matrices" do
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m = Matrix[ [1,2,3], [3,4,3], [0,0,0] ]
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m.singular?.should be_true
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m = Matrix[ [1,2,9], [3,4,9], [1,2,9] ]
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m.singular?.should be_true
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end
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it "returns false if the Matrix is regular" do
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Matrix[ [0,1], [1,0] ].singular?.should be_false
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end
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it "returns false for an empty 0x0 matrix" do
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Matrix.empty(0,0).singular?.should be_false
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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]].singular?
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}.should raise_error(Matrix::ErrDimensionMismatch)
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lambda {
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Matrix.empty(3,0).singular?
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}.should raise_error(Matrix::ErrDimensionMismatch)
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end
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end
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