change benchmarktest

src/test/java/com/alibaba/druid/benckmark/wall/WallBenchmarkTest1.java

@@ -15,13 +15,15 @@
  */
 package com.alibaba.druid.benckmark.wall;
 
+import java.util.Random;
+
 import junit.framework.TestCase;
 
 import com.alibaba.druid.wall.WallProvider;
 import com.alibaba.druid.wall.spi.MySqlWallProvider;
 
 public class WallBenchmarkTest1 extends TestCase {
-
+    static Random r = new Random();
     WallProvider            provider = new MySqlWallProvider();
 
     public final static int COUNT    = 1000 * 1000;
@@ -41,8 +43,26 @@ public class WallBenchmarkTest1 extends TestCase {
 
     public void perf(String sql) {
         for (int i = 0; i < COUNT; ++i) {
-        	String text = sql + " AND FID = " + i;
+        	String text = genRandomSql();
             provider.check(text);
         }
     }
+    
+    private String genRandomSql(){
+        int result1=r.nextInt(65535);
+        int result2=r.nextInt(65535);
+        String result = Integer.toBinaryString(result1)+""+Integer.toBinaryString(result2);
+        StringBuilder sb = new StringBuilder("select ");
+        for(int i=0;i<result.length();i++){
+           if(result.charAt(i) == '1'){
+              String tempString = "col"+(i+1)+",";
+              sb.append(tempString);
+           }
+        }
+        sb.delete(sb.length()-1, sb.length());
+        sb.append(" from sqlinject");
+        return sb.toString();
+     }
+
+
 }