public void TestEncodeUnicode()
{
Assert.AreEqual("English or \\u4E2D\\u6587 or a\\u0308 or \\uD834\\uDD60", StringExt.EncodeUnicode("English or 中文 or \u0061\u0308 or \uD834\uDD60"));
Assert.AreEqual("English or \\u4E2D\\u6587 or a\\u0308 or \\uD834\\uDD60", StringExt.EncodeUnicode("English or 中文 or \u0061\u0308 or \U0001D160"));
Assert.AreEqual("% a\\u0308 or \\uD834\\uDD60\\", StringExt.EncodeUnicode("\x25 \u0061\u0308 or \uD834\uDD60\\"));
Assert.AreEqual(null, StringExt.EncodeUnicode(null));
Assert.AreEqual("", StringExt.EncodeUnicode(""));
Assert.AreEqual("\\", StringExt.EncodeUnicode("\\"));
Assert.AreEqual("\\\\", StringExt.EncodeUnicode("\\\\"));
Assert.AreEqual("\\\\u0001", StringExt.EncodeUnicode("\\\x1"));
Assert.AreEqual("\\\\\\", StringExt.EncodeUnicode("\\\\\\"));
Assert.AreEqual("\\\\\\u0001", StringExt.EncodeUnicode("\\\\\x1"));
Assert.AreEqual("\\ab", StringExt.EncodeUnicode("\\ab"));
Assert.AreEqual("\\a\\b\\u23556", StringExt.EncodeUnicode("\\a\\b\x23556"));
Assert.AreEqual("\\a\\b\\u23556", StringExt.EncodeUnicode("\\a\\b\u23556"));
Assert.AreEqual("\\a\\b\\U23556", StringExt.EncodeUnicode("\\a\\b\\U23556"));
}