1 files changed, 66 insertions, 0 deletions
diff --git a/test/ruby/test_utf32.rb b/test/ruby/test_utf32.rb
index f81524f29..3d4a45851 100644
--- a/test/ruby/test_utf32.rb
+++ b/test/ruby/test_utf32.rb
@@ -20,8 +20,74 @@ EOT
 
   def test_substr
     assert_str_equal(
+      "abcdefgh".force_encoding("utf-32le"),
+      "abcdefgh".force_encoding("utf-32le")[0,3])
+    assert_str_equal(
       "abcdefgh".force_encoding("utf-32be"),
       "abcdefgh".force_encoding("utf-32be")[0,3])
   end
+
+  def test_mbc_len
+    al = "abcdefghijkl".force_encoding("utf-32le").each_char.to_a
+    ab = "abcdefghijkl".force_encoding("utf-32be").each_char.to_a
+    assert_equal("abcd".force_encoding("utf-32le"), al.shift)
+    assert_equal("efgh".force_encoding("utf-32le"), al.shift)
+    assert_equal("ijkl".force_encoding("utf-32le"), al.shift)
+    assert_equal("abcd".force_encoding("utf-32be"), ab.shift)
+    assert_equal("efgh".force_encoding("utf-32be"), ab.shift)
+    assert_equal("ijkl".force_encoding("utf-32be"), ab.shift)
+  end
+
+  def ascii_to_utf16le(s)
+    s.unpack("C*").map {|x| [x,0,0,0] }.flatten.pack("C*").force_encoding("utf-32le")
+  end
+
+  def ascii_to_utf16be(s)
+    s.unpack("C*").map {|x| [0,0,0,x] }.flatten.pack("C*").force_encoding("utf-32be")
+  end
+
+  def test_mbc_newline
+    al = ascii_to_utf16le("foo\nbar\nbaz\n").lines.to_a
+    ab = ascii_to_utf16be("foo\nbar\nbaz\n").lines.to_a
+
+    assert_equal(ascii_to_utf16le("foo\n"), al.shift)
+    assert_equal(ascii_to_utf16le("bar\n"), al.shift)
+    assert_equal(ascii_to_utf16le("baz\n"), al.shift)
+    assert_equal(ascii_to_utf16be("foo\n"), ab.shift)
+    assert_equal(ascii_to_utf16be("bar\n"), ab.shift)
+    assert_equal(ascii_to_utf16be("baz\n"), ab.shift)
+
+    sl = "a\0".force_encoding("utf-32le")
+    sb = "a\0".force_encoding("utf-32be")
+    assert_equal(sl, sl.chomp)
+    assert_equal(sb, sb.chomp)
+  end
+
+  def test_mbc_to_code
+    sl = "a\0\0\0".force_encoding("utf-32le")
+    sb = "\0\0\0a".force_encoding("utf-32be")
+    assert_equal("a".ord, sl.ord)
+    assert_equal("a".ord, sb.ord)
+  end
+
+  def utf8_to_utf32(s, e)
+    s.chars.map {|c| c.ord.chr(e) }.join
+  end
+
+  def test_mbc_case_fold
+    rl = Regexp.new(utf8_to_utf32("^(\u3042)(a)\\1\\2$", "utf-32le"), "i")
+    rb = Regexp.new(utf8_to_utf32("^(\u3042)(a)\\1\\2$", "utf-32be"), "i")
+    assert_equal(Encoding.find("utf-32le"), rl.encoding)
+    assert_equal(Encoding.find("utf-32be"), rb.encoding)
+    assert_match(rl, utf8_to_utf32("\u3042a\u3042a", "utf-32le"))
+    assert_match(rb, utf8_to_utf32("\u3042a\u3042a", "utf-32be"))
+  end
+
+  def test_code_to_mbc
+    sl = "a\0\0\0".force_encoding("utf-32le")
+    sb = "\0\0\0a".force_encoding("utf-32be")
+    assert_equal(sl, "a".ord.chr("utf-32le"))
+    assert_equal(sb, "a".ord.chr("utf-32be"))
+  end
 end