diff options
Diffstat (limited to 'spec/rubyspec/library/matrix/upper_triangular_spec.rb')
| -rw-r--r-- | spec/rubyspec/library/matrix/upper_triangular_spec.rb | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/spec/rubyspec/library/matrix/upper_triangular_spec.rb b/spec/rubyspec/library/matrix/upper_triangular_spec.rb new file mode 100644 index 0000000000..be88150b85 --- /dev/null +++ b/spec/rubyspec/library/matrix/upper_triangular_spec.rb @@ -0,0 +1,24 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require 'matrix' + +describe "Matrix.upper_triangular?" do + it "returns true for an upper triangular Matrix" do + Matrix[[1, 2, 3], [0, 2, 3], [0, 0, 3]].upper_triangular?.should be_true + Matrix.diagonal([1, 2, 3]).upper_triangular?.should be_true + Matrix[[1, 2], [0, 2], [0, 0], [0, 0]].upper_triangular?.should be_true + Matrix[[1, 2, 3, 4], [0, 2, 3, 4]].upper_triangular?.should be_true + end + + it "returns false for a non upper triangular square Matrix" do + Matrix[[0, 0], [1, 0]].upper_triangular?.should be_false + Matrix[[1, 2, 3], [1, 2, 3], [1, 2, 3]].upper_triangular?.should be_false + Matrix[[0, 0], [0, 0], [0, 0], [0, 1]].upper_triangular?.should be_false + Matrix[[0, 0, 0, 0], [1, 0, 0, 0]].upper_triangular?.should be_false + end + + it "returns true for an empty matrix" do + Matrix.empty(3,0).upper_triangular?.should be_true + Matrix.empty(0,3).upper_triangular?.should be_true + Matrix.empty(0,0).upper_triangular?.should be_true + end +end |