From 00471be51432248c1f008f414f0e826704522d99 Mon Sep 17 00:00:00 2001
From: Max Eisner <4730112+max-ae@users.noreply.github.com>
Date: Wed, 10 Aug 2022 19:07:19 +0200
Subject: [PATCH] add test

---
 Library/Homebrew/test/formula_spec.rb | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/Library/Homebrew/test/formula_spec.rb b/Library/Homebrew/test/formula_spec.rb
index f9e3f93116..9d7df566cb 100644
--- a/Library/Homebrew/test/formula_spec.rb
+++ b/Library/Homebrew/test/formula_spec.rb
@@ -1693,4 +1693,28 @@ describe Formula do
       expect(f.test).to eq(2)
     end
   end
+
+  describe "#generate_completions_from_executable" do
+    let(:f) do
+      Class.new(Testball) do
+        def install
+          bin.mkpath
+          (bin/"foo").write <<-EOF
+            echo completion
+          EOF
+
+          FileUtils.chmod "+x", bin/"foo"
+
+          generate_completions_from_executable(bin/"foo", "test")
+        end
+      end.new
+    end
+
+    it "generates completion scripts" do
+      f.brew { f.install }
+      expect(f.bash_completion/"foo").to be_a_file
+      expect(f.zsh_completion/"_foo").to be_a_file
+      expect(f.fish_completion/"foo.fish").to be_a_file
+    end
+  end
 end