1 files changed, 45 insertions, 0 deletions
diff --git a/activesupport/test/multibyte_test_helpers.rb b/activesupport/test/multibyte_test_helpers.rb
new file mode 100644
index 0000000000..7565655f25
--- /dev/null
+++ b/activesupport/test/multibyte_test_helpers.rb
@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+require "fileutils"
+require "open-uri"
+require "tmpdir"
+
+module MultibyteTestHelpers
+  class Downloader
+    def self.download(from, to)
+      unless File.exist?(to)
+        unless File.exist?(File.dirname(to))
+          system "mkdir -p #{File.dirname(to)}"
+        end
+        open(from) do |source|
+          File.open(to, "w") do |target|
+            source.each_line do |l|
+              target.write l
+            end
+          end
+        end
+      end
+      true
+    end
+  end
+
+  UNIDATA_URL = "http://www.unicode.org/Public/#{ActiveSupport::Multibyte::Unicode::UNICODE_VERSION}/ucd"
+  CACHE_DIR = "#{Dir.tmpdir}/cache/unicode_conformance/#{ActiveSupport::Multibyte::Unicode::UNICODE_VERSION}"
+  FileUtils.mkdir_p(CACHE_DIR)
+
+  UNICODE_STRING = "こにちわ"
+  ASCII_STRING = "ohayo"
+  BYTE_STRING = (+"\270\236\010\210\245").force_encoding("ASCII-8BIT").freeze
+
+  def chars(str)
+    ActiveSupport::Multibyte::Chars.new(str)
+  end
+
+  def inspect_codepoints(str)
+    str.to_s.unpack("U*").map { |cp| cp.to_s(16) }.join(" ")
+  end
+
+  def assert_equal_codepoints(expected, actual, message = nil)
+    assert_equal(inspect_codepoints(expected), inspect_codepoints(actual), message)
+  end
+end