1 files changed, 29 insertions, 0 deletions
diff --git a/spec/ruby/library/matrix/symmetric_spec.rb b/spec/ruby/library/matrix/symmetric_spec.rb
new file mode 100644
index 0000000000..4b86c19503
--- /dev/null
+++ b/spec/ruby/library/matrix/symmetric_spec.rb
@@ -0,0 +1,29 @@
+require_relative '../../spec_helper'
+require 'matrix'
+
+describe "Matrix.symmetric?" do
+  it "returns true for a symmetric Matrix" do
+    Matrix[[1, 2, Complex(0, 3)], [2, 4, 5], [Complex(0, 3), 5, 6]].symmetric?.should == true
+  end
+
+  it "returns true for a 0x0 empty matrix" do
+    Matrix.empty.symmetric?.should == true
+  end
+
+  it "returns false for an asymmetric Matrix" do
+    Matrix[[1, 2],[-2, 1]].symmetric?.should == false
+  end
+
+  it "raises an error for rectangular matrices" do
+    [
+      Matrix[[0], [0]],
+      Matrix[[0, 0]],
+      Matrix.empty(0, 2),
+      Matrix.empty(2, 0),
+    ].each do |rectangular_matrix|
+      -> {
+        rectangular_matrix.symmetric?
+      }.should.raise(Matrix::ErrDimensionMismatch)
+    end
+  end
+end