Create tmp directory before running tests

Author: seven1m

.dockerignore

@@ -3,3 +3,5 @@ build
 ext/natalie_parser/*.o
 ext/natalie_parser/*.log
 ext/natalie_parser/*.h
+test/tmp
+rubyspec_temp

test/asan_test.rb

@@ -3,6 +3,7 @@
 #     rake clean build_asan
 #     ruby test/asan_test.rb
 
+require 'fileutils'
 require 'minitest/spec'
 require 'minitest/autorun'
 require_relative 'support/compare_rubies'
@@ -24,6 +25,10 @@
 
   Dir.chdir File.expand_path('..', __dir__)
 
+  before do
+    FileUtils.mkdir_p 'test/tmp'
+  end
+
   TESTS.each do |path|
     next if TESTS_TO_SKIP.include?(path)