1 files changed, 162 insertions, 0 deletions
diff --git a/test/ruby/test_encoding.rb b/test/ruby/test_encoding.rb
new file mode 100644
index 0000000000..4a6dd932ed
--- /dev/null
+++ b/test/ruby/test_encoding.rb
@@ -0,0 +1,162 @@
+# frozen_string_literal: false
+require 'test/unit'
+
+class TestEncoding < Test::Unit::TestCase
+
+  # Test basic encoding methods: list, find, name
+  def test_encoding
+    encodings = Encoding.list
+    assert_equal(encodings.empty?, false)
+
+    encodings.each do |e|
+      assert_equal(e, Encoding.find(e.name))
+      assert_equal(e, Encoding.find(e.name.upcase))
+      assert_equal(e, Encoding.find(e.name.capitalize))
+      assert_equal(e, Encoding.find(e.name.downcase))
+      assert_equal(e, Encoding.find(e))
+    end
+  end
+
+  def test_enc_names
+    aliases = Encoding.aliases
+    aliases.each do |a, en|
+      e = Encoding.find(a)
+      assert_equal(e.name, en)
+      assert_include(e.names, a)
+    end
+  end
+
+  # Test that Encoding objects can't be copied
+  # And that they can be compared by object_id
+  def test_singleton
+    encodings = Encoding.list
+    encodings.each do |e|
+      assert_raise(TypeError) { e.dup }
+      assert_raise(TypeError) { e.clone }
+      assert_equal(e.object_id, Marshal.load(Marshal.dump(e)).object_id)
+    end
+  end
+
+  def test_find
+    assert_raise(ArgumentError) { Encoding.find("foobarbazqux") }
+    assert_nothing_raised{Encoding.find("locale")}
+    assert_nothing_raised{Encoding.find("filesystem")}
+
+    if /(?:ms|dar)win|mingw/ !~ RUBY_PLATFORM
+      # Unix's filesystem encoding is default_external
+      assert_ruby_status(%w[-EUTF-8:EUC-JP], <<-'EOS')
+        exit Encoding.find("filesystem") == Encoding::UTF_8
+        Encoding.default_external = Encoding::EUC_JP
+        exit Encoding.find("filesystem") == Encoding::EUC_JP
+      EOS
+    end
+
+    bug5150 = '[ruby-dev:44327]'
+    assert_raise(TypeError, bug5150) {Encoding.find(1)}
+  end
+
+  def test_replicate
+    assert_separately([], "#{<<~'END;'}")
+    assert_instance_of(Encoding, Encoding::UTF_8.replicate("UTF-8-ANOTHER#{Time.now.to_f}"))
+    assert_instance_of(Encoding, Encoding::ISO_2022_JP.replicate("ISO-2022-JP-ANOTHER#{Time.now.to_f}"))
+    bug3127 = '[ruby-dev:40954]'
+    assert_raise(TypeError, bug3127) {Encoding::UTF_8.replicate(0)}
+    assert_raise_with_message(ArgumentError, /\bNUL\b/, bug3127) {Encoding::UTF_8.replicate("\0")}
+    END;
+  end
+
+  def test_extra_encoding
+    assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}")
+    begin;
+      200.times {|i|
+        Encoding::UTF_8.replicate("dummy#{i}")
+      }
+      e = Encoding.list.last
+      format = "%d".force_encoding(e)
+      assert_equal("0", format % 0)
+      assert_equal(e, format.dup.encoding)
+      assert_equal(e, (format*1).encoding)
+
+      assert_equal(e, (("x"*30).force_encoding(e)*1).encoding)
+      GC.start
+
+      name = "A" * 64
+      Encoding.list.each do |enc|
+        assert_raise(ArgumentError) {enc.replicate(name)}
+        name.succ!
+      end
+    end;
+  end
+
+  def test_dummy_p
+    assert_equal(true, Encoding::ISO_2022_JP.dummy?)
+    assert_equal(false, Encoding::UTF_8.dummy?)
+  end
+
+  def test_ascii_compatible_p
+    assert_equal(true, Encoding::ASCII_8BIT.ascii_compatible?)
+    assert_equal(true, Encoding::UTF_8.ascii_compatible?)
+    assert_equal(false, Encoding::UTF_16BE.ascii_compatible?)
+    assert_equal(false, Encoding::ISO_2022_JP.ascii_compatible?)
+  end
+
+  def test_name_list
+    assert_instance_of(Array, Encoding.name_list)
+    Encoding.name_list.each do |x|
+      assert_instance_of(String, x)
+    end
+  end
+
+  def test_aliases
+    assert_instance_of(Hash, Encoding.aliases)
+    Encoding.aliases.each do |k, v|
+      assert_include(Encoding.name_list, k)
+      assert_include(Encoding.name_list, v)
+      assert_instance_of(String, k)
+      assert_instance_of(String, v)
+    end
+  end
+
+  def test_marshal
+    str = "".force_encoding("EUC-JP")
+    str2 = Marshal.load(Marshal.dump(str))
+    assert_equal(str, str2)
+    str2 = Marshal.load(Marshal.dump(str2))
+    assert_equal(str, str2, '[ruby-dev:38596]')
+  end
+
+  def test_compatible_p
+    ua = "abc".force_encoding(Encoding::UTF_8)
+    assert_equal(Encoding::UTF_8, Encoding.compatible?(ua, :abc))
+    assert_equal(nil, Encoding.compatible?(ua, 1))
+    bin = "a".force_encoding(Encoding::ASCII_8BIT)
+    asc = "b".force_encoding(Encoding::US_ASCII)
+    assert_equal(Encoding::ASCII_8BIT, Encoding.compatible?(bin, asc))
+    bin = "\xff".force_encoding(Encoding::ASCII_8BIT).to_sym
+    asc = "b".force_encoding(Encoding::ASCII_8BIT)
+    assert_equal(Encoding::ASCII_8BIT, Encoding.compatible?(bin, asc))
+    assert_equal(Encoding::UTF_8, Encoding.compatible?("\u{3042}".to_sym, ua.to_sym))
+  end
+
+  def test_errinfo_after_autoload
+    assert_separately(%w[--disable=gems], "#{<<~"begin;"}\n#{<<~'end;'}")
+    bug9038 = '[ruby-core:57949] [Bug #9038]'
+    begin;
+      e = assert_raise_with_message(SyntaxError, /unknown regexp option - Q/, bug9038) {
+        eval("/regexp/sQ")
+      }
+      assert_include(e.message, "/regexp/sQ\n")
+    end;
+  end
+
+  def test_nonascii_library_path
+    assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}".force_encoding("US-ASCII"))
+    begin;
+      assert_equal(Encoding::US_ASCII, __ENCODING__)
+      $:.unshift("/\x80")
+      assert_raise_with_message(LoadError, /\[Bug #16382\]/) do
+        require "[Bug #16382]"
+      end
+    end;
+  end
+end