1 files changed, 33 insertions, 30 deletions
diff --git a/spec/ruby/library/matrix/real_spec.rb b/spec/ruby/library/matrix/real_spec.rb
index 38033c63c8..63a6bde923 100644
--- a/spec/ruby/library/matrix/real_spec.rb
+++ b/spec/ruby/library/matrix/real_spec.rb
@@ -1,43 +1,46 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix#real?" do
-  it "returns true for matrices with all real entries" do
-    Matrix[ [1,   2], [3, 4] ].real?.should be_true
-    Matrix[ [1.9, 2], [3, 4] ].real?.should be_true
-  end
+ruby_version_is ""..."3.1" do
+  require_relative 'fixtures/classes'
+  require 'matrix'
 
-  it "returns true for empty matrices" do
-    Matrix.empty.real?.should be_true
-  end
+  describe "Matrix#real?" do
+    it "returns true for matrices with all real entries" do
+      Matrix[ [1,   2], [3, 4] ].real?.should be_true
+      Matrix[ [1.9, 2], [3, 4] ].real?.should be_true
+    end
 
-  it "returns false if one element is a Complex" do
-    Matrix[ [Complex(1,1), 2], [3, 4] ].real?.should be_false
-  end
+    it "returns true for empty matrices" do
+      Matrix.empty.real?.should be_true
+    end
 
-  # Guard against the Mathn library
-  guard -> { !defined?(Math.rsqrt) } do
-    it "returns false if one element is a Complex whose imaginary part is 0" do
-      Matrix[ [Complex(1,0), 2], [3, 4] ].real?.should be_false
+    it "returns false if one element is a Complex" do
+      Matrix[ [Complex(1,1), 2], [3, 4] ].real?.should be_false
     end
-  end
-end
 
-describe "Matrix#real" do
-  it "returns a matrix with the real part of the elements of the receiver" do
-    Matrix[ [1,   2], [3, 4] ].real.should == Matrix[ [1,   2], [3, 4] ]
-    Matrix[ [1.9, Complex(1,1)], [Complex(-0.42, 0), 4] ].real.should == Matrix[ [1.9, 1], [-0.42, 4] ]
+    # Guard against the Mathn library
+    guard -> { !defined?(Math.rsqrt) } do
+      it "returns false if one element is a Complex whose imaginary part is 0" do
+        Matrix[ [Complex(1,0), 2], [3, 4] ].real?.should be_false
+      end
+    end
   end
 
-  it "returns empty matrices on the same size if empty" do
-    Matrix.empty(0, 3).real.should == Matrix.empty(0, 3)
-    Matrix.empty(3, 0).real.should == Matrix.empty(3, 0)
-  end
+  describe "Matrix#real" do
+    it "returns a matrix with the real part of the elements of the receiver" do
+      Matrix[ [1,   2], [3, 4] ].real.should == Matrix[ [1,   2], [3, 4] ]
+      Matrix[ [1.9, Complex(1,1)], [Complex(-0.42, 0), 4] ].real.should == Matrix[ [1.9, 1], [-0.42, 4] ]
+    end
+
+    it "returns empty matrices on the same size if empty" do
+      Matrix.empty(0, 3).real.should == Matrix.empty(0, 3)
+      Matrix.empty(3, 0).real.should == Matrix.empty(3, 0)
+    end
 
-  describe "for a subclass of Matrix" do
-    it "returns an instance of that subclass" do
-      MatrixSub.ins.real.should be_an_instance_of(MatrixSub)
+    describe "for a subclass of Matrix" do
+      it "returns an instance of that subclass" do
+        MatrixSub.ins.real.should be_an_instance_of(MatrixSub)
+      end
     end
   end
 end