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
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+++ b/spec/ruby/library/matrix/symmetric_spec.rb
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+require File.expand_path('../../../spec_helper', __FILE__)
+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 be_true
+  end
+
+  it "returns true for a 0x0 empty matrix" do
+    Matrix.empty.symmetric?.should be_true
+  end
+
+  it "returns false for an assymetric Matrix" do
+    Matrix[[1, 2],[-2, 1]].symmetric?.should be_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 |rectangual_matrix|
+      lambda {
+        rectangual_matrix.symmetric?
+      }.should raise_error(Matrix::ErrDimensionMismatch)
+    end
+  end
+end