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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
24 lines
1 KiB
Ruby
24 lines
1 KiB
Ruby
require File.expand_path('../../../spec_helper', __FILE__)
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require 'matrix'
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describe "Matrix.lower_triangular?" do
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it "returns true for a square lower triangular Matrix" do
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Matrix[[1, 0, 0], [1, 2, 0], [1, 2, 3]].lower_triangular?.should be_true
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Matrix.diagonal([1, 2, 3]).lower_triangular?.should be_true
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Matrix[[1, 0], [1, 2], [1, 2], [1, 2]].lower_triangular?.should be_true
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Matrix[[1, 0, 0, 0], [1, 2, 0, 0]].lower_triangular?.should be_true
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end
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it "returns true for an empty Matrix" do
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Matrix.empty(3, 0).lower_triangular?.should be_true
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Matrix.empty(0, 3).lower_triangular?.should be_true
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Matrix.empty(0, 0).lower_triangular?.should be_true
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end
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it "returns false for a non lower triangular square Matrix" do
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Matrix[[0, 1], [0, 0]].lower_triangular?.should be_false
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Matrix[[1, 2, 3], [1, 2, 3], [1, 2, 3]].lower_triangular?.should be_false
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Matrix[[0, 1], [0, 0], [0, 0], [0, 0]].lower_triangular?.should be_false
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Matrix[[0, 0, 0, 1], [0, 0, 0, 0]].lower_triangular?.should be_false
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end
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end
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