1 files changed, 28 insertions, 0 deletions
diff --git a/spec/ruby/library/matrix/square_spec.rb b/spec/ruby/library/matrix/square_spec.rb
new file mode 100644
index 0000000000..a117916a4c
--- /dev/null
+++ b/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