1 files changed, 13 insertions, 0 deletions
diff --git a/spec/ruby/library/matrix/lup_decomposition/initialize_spec.rb b/spec/ruby/library/matrix/lup_decomposition/initialize_spec.rb
new file mode 100644
index 0000000000..b813757525
--- /dev/null
+++ b/spec/ruby/library/matrix/lup_decomposition/initialize_spec.rb
@@ -0,0 +1,13 @@
+require_relative '../../../spec_helper'
+require 'matrix'
+
+describe "Matrix::LUPDecomposition#initialize" do
+  it "raises an error if argument is not a matrix" do
+    -> {
+      Matrix::LUPDecomposition.new([[]])
+    }.should.raise(TypeError)
+    -> {
+      Matrix::LUPDecomposition.new(42)
+    }.should.raise(TypeError)
+  end
+end