From 18150d9629d3981d14b8ac7ef83a1a5678601164 Mon Sep 17 00:00:00 2001
From: Markus Reiter <me@reitermark.us>
Date: Fri, 16 Feb 2024 10:22:10 +0100
Subject: [PATCH] Demonstrate flaky tests.

---
 Library/Homebrew/test/cask/cask_loader_spec.rb | 15 +++++++++++++++
 Library/Homebrew/test/formulary_spec.rb        | 15 +++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/Library/Homebrew/test/cask/cask_loader_spec.rb b/Library/Homebrew/test/cask/cask_loader_spec.rb
index ccaa8d16aa..ca2bb32441 100644
--- a/Library/Homebrew/test/cask/cask_loader_spec.rb
+++ b/Library/Homebrew/test/cask/cask_loader_spec.rb
@@ -104,6 +104,21 @@ describe Cask::CaskLoader, :cask do
             described_class.for("#{old_tap}/#{token}")
           end.to output(%r{Cask #{old_tap}/#{token} was renamed to #{token}\.}).to_stderr
         end
+
+        context "when there is an infinite tap migration loop" do
+          before do
+            (default_tap.path/"tap_migrations.json").write({
+              token => old_tap.name,
+            }.to_json)
+            default_tap.clear_cache
+          end
+
+          it "stops recursing" do
+            expect do
+              described_class.for("#{default_tap}/#{token}")
+            end.not_to output.to_stderr
+          end
+        end
       end
     end
   end
diff --git a/Library/Homebrew/test/formulary_spec.rb b/Library/Homebrew/test/formulary_spec.rb
index 86988f0533..e12a41d898 100644
--- a/Library/Homebrew/test/formulary_spec.rb
+++ b/Library/Homebrew/test/formulary_spec.rb
@@ -572,6 +572,21 @@ describe Formulary do
             described_class.loader_for("#{old_tap}/#{token}")
           end.to output(%r{Formula #{old_tap}/#{token} was renamed to #{token}\.}).to_stderr
         end
+
+        context "when there is an infinite tap migration loop" do
+          before do
+            (default_tap.path/"tap_migrations.json").write({
+              token => old_tap.name,
+            }.to_json)
+            default_tap.clear_cache
+          end
+
+          it "stops recursing" do
+            expect do
+              described_class.loader_for("#{default_tap}/#{token}")
+            end.not_to output.to_stderr
+          end
+        end
       end
     end
   end