Update to ruby/mspec@19d929e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61283 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 17 insertions, 0 deletions

diff --git a/spec/mspec/lib/mspec/helpers/frozen_error_class.rb b/spec/mspec/lib/mspec/helpers/frozen_error_class.rb
new file mode 100644
index 0000000000..26788ad9ad
--- /dev/null
+++ b/spec/mspec/lib/mspec/helpers/frozen_error_class.rb
@@ -0,0 +1,17 @@
+require 'mspec/guards/version'
+
+# This helper makes it easy to write version independent
+# specs for frozen objects.
+unless respond_to? :frozen_error_class
+  ruby_version_is "2.5" do
+    def frozen_error_class
+      FrozenError
+    end
+  end
+
+  ruby_version_is ""..."2.5" do
+    def frozen_error_class
+      RuntimeError
+    end
+  end
+end