add test: TLVTest

src/main/java/encoding/VlInt.java

@@ -39,6 +39,10 @@ public class VlInt {
     public static final int VlIntSize5=5;
     public static final int VlIntSize9=9;
 
+    public static final long uint16Max= (long) (pow(2, 16)-1);
+    public static final long uint32Max= (long) (pow(2, 32)-1);
+    public static final long uint64Max= Long.MAX_VALUE; //MIN1.0中此数用long的最大值表示
+
     /**
      * 测量一个变长整型实际用几个字节表示
      * @return
@@ -52,15 +56,11 @@ public class VlInt {
         }
         if(bigInteger.compareTo(BigInteger.valueOf(241)) < 0){
             return 1;
-        }else if(bigInteger.compareTo(BigInteger.valueOf(
-                new Double(pow(2, 16)).longValue())) < 0){
+        }else if(bigInteger.compareTo(BigInteger.valueOf(uint16Max)) <= 0){
             return 3;
-        }else if(bigInteger.compareTo(BigInteger.valueOf(
-                new Double(pow(2, 32)).longValue())) < 0){
+        }else if(bigInteger.compareTo(BigInteger.valueOf(uint32Max))<= 0){
             return 5;
-        }else if(bigInteger.compareTo(BigInteger.valueOf(
-                new Double(pow(2, 64)).longValue())) <= 0){
-            // 这里其实是与long的最大值做对比，所以可以等
+        }else if(bigInteger.compareTo(BigInteger.valueOf(uint64Max)) <= 0){
             return 9;
         }else{
             //MIN1.0中，VlInt的size最大为9
@@ -287,6 +287,7 @@ public class VlInt {
 
     /**
      * 将BigInteger转为byte[按照变长无符号整数方式转]
+     *
      * @param bigInteger
      * @return
      */