1 files changed, 15 insertions, 0 deletions
diff --git a/spec/ruby/library/matrix/hash_spec.rb b/spec/ruby/library/matrix/hash_spec.rb
new file mode 100644
index 0000000000..27bf7b9751
--- /dev/null
+++ b/spec/ruby/library/matrix/hash_spec.rb
@@ -0,0 +1,15 @@
+require_relative '../../spec_helper'
+require 'matrix'
+
+describe "Matrix#hash" do
+
+  it "returns an Integer" do
+    Matrix[ [1,2] ].hash.should.instance_of?(Integer)
+  end
+
+  it "returns the same value for the same matrix" do
+    data = [ [40,5], [2,7] ]
+    Matrix[ *data ].hash.should == Matrix[ *data ].hash
+  end
+
+end