Guard ruby/spec with spec/mspec/tool/wrap_with_guard.rb

Merged: https://github.com/ruby/ruby/pull/4530

spec/ruby/library/matrix/eigenvalue_decomposition/initialize_spec.rb

@@ -1,24 +1,27 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::EigenvalueDecomposition#initialize" do
-  it "raises an error if argument is not a matrix" do
-    -> {
-      Matrix::EigenvalueDecomposition.new([[]])
-    }.should raise_error(TypeError)
-    -> {
-      Matrix::EigenvalueDecomposition.new(42)
-    }.should raise_error(TypeError)
-  end
+ruby_version_is ""..."3.1" do
+  require 'matrix'
 
-  it "raises an error if matrix is not square" do
-    -> {
-      Matrix::EigenvalueDecomposition.new(Matrix[[1, 2]])
-    }.should raise_error(Matrix::ErrDimensionMismatch)
-  end
+  describe "Matrix::EigenvalueDecomposition#initialize" do
+    it "raises an error if argument is not a matrix" do
+      -> {
+        Matrix::EigenvalueDecomposition.new([[]])
+      }.should raise_error(TypeError)
+      -> {
+        Matrix::EigenvalueDecomposition.new(42)
+      }.should raise_error(TypeError)
+    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"
+    it "raises an error if matrix is not square" do
+      -> {
+        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
 end