Move spec/rubyspec to spec/ruby for consistency

* 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

spec/ruby/library/matrix/square_spec.rb

@@ -0,0 +1,28 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require 'matrix'
+
+describe "Matrix#square?" do
+
+  it "returns true when the Matrix is square" do
+    Matrix[ [1,2], [2,4] ].square?.should be_true
+    Matrix[ [100,3,5], [9.5, 4.9, 8], [2,0,77] ].square?.should be_true
+  end
+
+  it "returns true when the Matrix has only one element" do
+    Matrix[ [9] ].square?.should be_true
+  end
+
+  it "returns false when the Matrix is rectangular" do
+    Matrix[ [1, 2] ].square?.should be_false
+  end
+
+  it "returns false when the Matrix is rectangular" do
+    Matrix[ [1], [2] ].square?.should be_false
+  end
+
+  it "returns handles empty matrices" do
+    Matrix[].square?.should be_true
+    Matrix[[]].square?.should be_false
+    Matrix.columns([[]]).square?.should be_false
+  end
+end