gnu: Add ruby-minitest-global-expectations.

* gnu/packages/ruby.scm (ruby-minitest-global-expectations): New variable.

gnu/packages/ruby.scm

@@ -4519,6 +4519,29 @@ reporter.")
     (home-page "https://blowmage.com/minitest-rg/")
     (license license:expat)))
 
+(define-public ruby-minitest-global-expectations
+  (package
+    (name "ruby-minitest-global-expectations")
+    (version "1.0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (rubygems-uri "minitest-global_expectations"
+                          version))
+       (sha256
+        (base32
+         "1pp3k2608spj4kvqy2y16hs18an917g6vwgvphrfhjviac83090x"))))
+    (build-system ruby-build-system)
+    (propagated-inputs
+     `(("ruby-minitest" ,ruby-minitest)))
+    (synopsis "Adjust minitest behaviour for calling expectation methods")
+    (description
+     "Minitest-global_expectations allows continued use of expectation methods
+on all objects.  Calling expectation methods on all objects was deprecated in
+minitest 5.12, and is planned to be removed from minitest 6.")
+    (home-page "https://github.com/jeremyevans/minitest-global_expectations")
+    (license license:expat)))
+
 (define-public ruby-minitest-hooks
   (package
     (name "ruby-minitest-hooks")