tests: add QuicTLSCheck test

Library/Homebrew/test/rubocops/lines/quictls_check_spec.rb

@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+require "rubocops/lines"
+
+describe RuboCop::Cop::FormulaAudit::QuicTLSCheck do
+  subject(:cop) { described_class.new }
+
+  context "when auditing formula dependencies" do
+    it "reports an offense when a formula depends on `quictls`" do
+      expect_offense(<<~RUBY, "/homebrew-core/Formula/foo.rb")
+        class Foo < Formula
+          desc "foo"
+          url 'https://brew.sh/foo-1.0.tgz'
+
+          depends_on "quictls"
+          ^^^^^^^^^^^^^^^^^^^^ FormulaAudit/QuicTLSCheck: Formulae in homebrew/core should use 'depends_on "openssl@3"' instead of 'depends_on "quictls"'.
+        end
+      RUBY
+    end
+  end
+end