1 files changed, 14 insertions, 4 deletions
diff --git a/spec/ruby/library/matrix/rectangular_spec.rb b/spec/ruby/library/matrix/rectangular_spec.rb
index 1fc2e0e60d..c0732f96bc 100644
--- a/spec/ruby/library/matrix/rectangular_spec.rb
+++ b/spec/ruby/library/matrix/rectangular_spec.rb
@@ -1,9 +1,19 @@
 require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+require 'matrix'
 
-ruby_version_is ""..."3.1" do
-  require_relative 'shared/rectangular'
+describe "Matrix#rectangular" do
+  it "returns [receiver.real, receiver.imag]" do
+    m = Matrix[ [1.2, Complex(1,2)], [Complex(-2,0.42), 4] ]
+    m.rectangular.should == [m.real, m.imag]
 
-  describe "Matrix#rectangular" do
-    it_behaves_like :matrix_rectangular, :rectangular
+    m = Matrix.empty(3, 0)
+    m.rectangular.should == [m.real, m.imag]
+  end
+
+  describe "for a subclass of Matrix" do
+    it "returns instances of that subclass" do
+      MatrixSub.ins.rectangular.each{|m| m.should.instance_of?(MatrixSub) }
+    end
   end
 end