content: package com.alibaba.druid.bvt.sql.eval;
  
  import com.alibaba.druid.sql.visitor.SQLEvalVisitorUtils;
  import com.alibaba.druid.util.JdbcConstants;
  import junit.framework.TestCase;
  
  public class EvalMethodPowerTest extends TestCase {
      public void test_reverse() throws Exception {
          assertEquals(Math.pow(1, 2), SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "power(1, 2)"));
          assertEquals(Math.pow(3, 4), SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "power(3, 4)"));
          assertEquals(Math.pow(4, 5), SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "pow(4, 5)"));
      }
  
      public void test_error() throws Exception {
          Exception error = null;
          try {
              SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "pow()", 12L);
          } catch (Exception e) {
              error = e;
          }
          assertNotNull(error);
      }
  
      public void test_error_1() throws Exception {
          Exception error = null;
          try {
              SQLEvalVisitorUtils.evalExpr(JdbcConstants.MYSQL, "pow(a,b)");
          } catch (Exception e) {
              error = e;
          }
          assertNotNull(error);
      }
  }
  