From e1b66cc2a88a7244e5f3f057610a622e8c7ef0d0 Mon Sep 17 00:00:00 2001
From: Daniel Mendler <mail@daniel-mendler.de>
Date: Sun, 23 Apr 2023 10:26:10 +0200
Subject: [PATCH] Ensure that tests work with --enable-frozen-string-literal

Adjust the RUBYOPT variable before running the tests.
export RUBYOPT=--enable-frozen-string-literal
---
 test/core/helper.rb        | 2 +-
 test/core/test_encoding.rb | 4 ++--
 test/literate/run.rb       | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/test/core/helper.rb b/test/core/helper.rb
index 5bfc5b60..5d3bcd5f 100644
--- a/test/core/helper.rb
+++ b/test/core/helper.rb
@@ -121,7 +121,7 @@ def call_macro(name, *args)
   end
 
   def hello_world(text = "Hello World from @env", opts = {})
-    text << opts.to_a * " " if opts.any?
+    text = text + (opts.to_a * " ") if opts.any?
     if block_given?
       "#{text} #{yield} #{text}"
     else
diff --git a/test/core/test_encoding.rb b/test/core/test_encoding.rb
index b69ce5fa..d8c2d7af 100644
--- a/test/core/test_encoding.rb
+++ b/test/core/test_encoding.rb
@@ -8,10 +8,10 @@ def test_windows_crlf
   end
 
   def test_binary
-    source = "| \xFF\xFF"
+    source = "| \xFF\xFF".dup
     source.force_encoding(Encoding::BINARY)
 
-    result = "\xFF\xFF"
+    result = "\xFF\xFF".dup
     result.force_encoding(Encoding::BINARY)
 
     out = render(source, default_encoding: 'binary')
diff --git a/test/literate/run.rb b/test/literate/run.rb
index 30b665a1..b2b8abb0 100644
--- a/test/literate/run.rb
+++ b/test/literate/run.rb
@@ -63,7 +63,7 @@ def on_slim(code)
     def on_html(code)
       raise Temple::FilterError, 'Html block must be preceded by slim block' unless @in_testcase
       @in_testcase = false
-      result =  "  html = #{code.inspect}\n"
+      result =  "  html = #{code.inspect}\n".dup
       if @opts.empty?
         result << "  _(render(slim)).must_equal html\nend\n"
       else