ControlFlowFunctionsTest.java

package com.alipay.zdal.test.ut.sqlparser.mysql;

import java.util.List;

import org.junit.Test;

import junit.framework.Assert;

import com.alipay.zdal.parser.sql.ast.SQLStatement;
import com.alipay.zdal.parser.sql.dialect.mysql.parser.MySqlStatementParser;
import com.alipay.zdal.parser.sql.dialect.mysql.visitor.MySqlOutputVisitor;
import com.alipay.zdal.parser.sql.parser.SQLStatementParser;

public class ControlFlowFunctionsTest {
	@Test
	 public void test_0() throws Exception {
	        String sql = "SELECT CASE 1 WHEN 1 THEN 'one' WHEN 2 THEN 'two' ELSE 'more' END;";

	        SQLStatementParser parser = new MySqlStatementParser(sql);
	        List<SQLStatement> stmtList = parser.parseStatementList();

	        String text = output(stmtList);

	        Assert.assertEquals("SELECT CASE 1 WHEN 1 THEN 'one' WHEN 2 THEN 'two' ELSE 'more' END;",
	            text);
	    }
	@Test
	    public void test_1() throws Exception {
	        String sql = "SELECT IF(1>2,2,3);";

	        SQLStatementParser parser = new MySqlStatementParser(sql);
	        List<SQLStatement> stmtList = parser.parseStatementList();

	        String text = output(stmtList);

	        Assert.assertEquals("SELECT IF(1 > 2, 2, 3);", text);
	    }
	    @Test
	    public void test_2() throws Exception {
	        String sql = "SELECT IF(1<2,'yes','no');";

	        SQLStatementParser parser = new MySqlStatementParser(sql);
	        List<SQLStatement> stmtList = parser.parseStatementList();

	        String text = output(stmtList);

	        Assert.assertEquals("SELECT IF(1 < 2, 'yes', 'no');", text);
	    }
	    @Test
	    public void test_3() throws Exception {
	        String sql = "SELECT IF(STRCMP('test','test1'),'no','yes');";

	        SQLStatementParser parser = new MySqlStatementParser(sql);
	        List<SQLStatement> stmtList = parser.parseStatementList();

	        String text = output(stmtList);

	        Assert.assertEquals("SELECT IF(STRCMP('test', 'test1'), 'no', 'yes');", text);
	    }
	    @Test
	    public void test_4() throws Exception {
	        String sql = "SELECT IFNULL(1,0);";

	        SQLStatementParser parser = new MySqlStatementParser(sql);
	        List<SQLStatement> stmtList = parser.parseStatementList();

	        String text = output(stmtList);

	        Assert.assertEquals("SELECT IFNULL(1, 0);", text);
	    }
	    @Test
	    public void test_5() throws Exception {
	        String sql = "SELECT IFNULL(1/0,'yes');";

	        SQLStatementParser parser = new MySqlStatementParser(sql);
	        List<SQLStatement> stmtList = parser.parseStatementList();

	        String text = output(stmtList);

	        Assert.assertEquals("SELECT IFNULL(1 / 0, 'yes');", text);
	    }

	    private String output(List<SQLStatement> stmtList) {
	        StringBuilder out = new StringBuilder();

	        for (SQLStatement stmt : stmtList) {
	            stmt.accept(new MySqlOutputVisitor(out));
	            out.append(";");
	        }

	        return out.toString();
	    }
}