add PunyCode

hutool-core/src/test/java/cn/hutool/core/codec/PunyCodeTest.java

@@ -0,0 +1,18 @@
+package cn.hutool.core.codec;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class PunyCodeTest {
+
+	@Test
+	public void encodeDecodeTest(){
+		String text = "Hutool编码器";
+		String strPunyCode = PunyCode.encode(text);
+		Assert.assertEquals("Hutool-ux9js33tgln", strPunyCode);
+		String decode = PunyCode.decode("Hutool-ux9js33tgln");
+		Assert.assertEquals(text, decode);
+		decode = PunyCode.decode("xn--Hutool-ux9js33tgln");
+		Assert.assertEquals(text, decode);
+	}
+}