Add in-tree mspec and ruby/spec

* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
  These files can therefore be updated like any other file in MRI.
  Instructions are provided in spec/README.
  [Feature #13156] [ruby-core:79246]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 31 insertions, 0 deletions

diff --git a/spec/rubyspec/library/matrix/regular_spec.rb b/spec/rubyspec/library/matrix/regular_spec.rb
new file mode 100644
index 0000000000..a62a200d6d
--- /dev/null
+++ b/spec/rubyspec/library/matrix/regular_spec.rb
@@ -0,0 +1,31 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require 'matrix'
+
+describe "Matrix#regular?" do
+
+  it "returns false for singular matrices" do
+    m = Matrix[ [1,2,3], [3,4,3], [0,0,0] ]
+    m.regular?.should be_false
+
+    m = Matrix[ [1,2,9], [3,4,9], [1,2,9] ]
+    m.regular?.should be_false
+  end
+
+  it "returns true if the Matrix is regular" do
+    Matrix[ [0,1], [1,0] ].regular?.should be_true
+  end
+
+  it "returns true for an empty 0x0 matrix" do
+    Matrix.empty(0,0).regular?.should be_true
+  end
+
+  it "raises an error for rectangular matrices" do
+     lambda {
+       Matrix[[1], [2], [3]].regular?
+     }.should raise_error(Matrix::ErrDimensionMismatch)
+
+     lambda {
+       Matrix.empty(3,0).regular?
+     }.should raise_error(Matrix::ErrDimensionMismatch)
+   end
+end