1 files changed, 24 insertions, 0 deletions
diff --git a/spec/ruby/library/matrix/eigenvalue_decomposition/initialize_spec.rb b/spec/ruby/library/matrix/eigenvalue_decomposition/initialize_spec.rb
new file mode 100644
index 0000000000..97d9be8f2d
--- /dev/null
+++ b/spec/ruby/library/matrix/eigenvalue_decomposition/initialize_spec.rb
@@ -0,0 +1,24 @@
+require File.expand_path('../../../../spec_helper', __FILE__)
+require 'matrix'
+
+describe "Matrix::EigenvalueDecomposition#initialize" do
+  it "raises an error if argument is not a matrix" do
+    lambda {
+      Matrix::EigenvalueDecomposition.new([[]])
+    }.should raise_error(TypeError)
+    lambda {
+      Matrix::EigenvalueDecomposition.new(42)
+    }.should raise_error(TypeError)
+  end
+
+  it "raises an error if matrix is not square" do
+    lambda {
+      Matrix::EigenvalueDecomposition.new(Matrix[[1, 2]])
+    }.should raise_error(Matrix::ErrDimensionMismatch)
+  end
+
+  it "never hangs" do
+    m = Matrix[ [0,0,0,0,0], [0,0,0,0,1], [0,0,0,1,0], [1,1,0,0,1], [1,0,1,0,1] ]
+    Matrix::EigenvalueDecomposition.new(m).should_not == "infinite loop"
+  end
+end