EqualTest_interval_mysql.java

package com.alibaba.druid.bvt.sql;

import junit.framework.TestCase;

import org.junit.Assert;

import com.alibaba.druid.sql.dialect.mysql.ast.expr.MySqlIntervalExpr;
import com.alibaba.druid.sql.dialect.mysql.parser.MySqlExprParser;
import com.alibaba.druid.sql.parser.SQLExprParser;

public class EqualTest_interval_mysql extends TestCase {

    public void test_exits() throws Exception {
        String sql = "INTERVAL 3 YEAR";
        String sql_c = "INTERVAL 3 MONTH";
        MySqlIntervalExpr exprA, exprB, exprC;
        {
            SQLExprParser parser = new MySqlExprParser(sql);
            exprA = (MySqlIntervalExpr) parser.expr();
        }
        {
            SQLExprParser parser = new MySqlExprParser(sql);
            exprB = (MySqlIntervalExpr) parser.expr();
        }
        {
            SQLExprParser parser = new MySqlExprParser(sql_c);
            exprC = (MySqlIntervalExpr) parser.expr();
        }
        Assert.assertEquals(exprA, exprB);
        Assert.assertNotEquals(exprA, exprC);
        Assert.assertTrue(exprA.equals(exprA));
        Assert.assertFalse(exprA.equals(new Object()));
        Assert.assertEquals(exprA.hashCode(), exprB.hashCode());
        
        Assert.assertEquals(new MySqlIntervalExpr(), new MySqlIntervalExpr());
        Assert.assertEquals(new MySqlIntervalExpr().hashCode(), new MySqlIntervalExpr().hashCode());
    }
}