querydsl/querydsl-sql/src/test/java/com/mysema/query/sql/PostgresTemplatesTest.java

/*
 * Copyright 2011, Mysema Ltd
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.mysema.query.sql;

import static org.junit.Assert.assertEquals;

import org.junit.Test;

import com.mysema.query.types.Path;
import com.mysema.query.types.expr.NumberExpression;
import com.mysema.query.types.path.SimplePath;
import com.mysema.query.types.template.NumberTemplate;


public class PostgresTemplatesTest extends AbstractSQLTemplatesTest{

    @Override
    protected SQLTemplates createTemplates() {
        return new PostgresTemplates();
    }    
    
    @Test
    public void NoFrom(){
        query.getMetadata().addProjection(NumberTemplate.ONE);
        assertEquals("select 1", query.toString());
    }
    
    @SuppressWarnings("unchecked")
    @Test
    public void Union(){        
        NumberExpression<Integer> one = NumberTemplate.ONE;
        NumberExpression<Integer> two = NumberTemplate.TWO;
        NumberExpression<Integer> three = NumberTemplate.THREE;
        Path<Integer> col1 = new SimplePath<Integer>(Integer.class,"col1");
        Union union = query.union(
            sq().unique(one.as(col1)),
            sq().unique(two),
            sq().unique(three));
        assertEquals(
                "(select 1 as col1)\n" +
                "union\n" +
                "(select 2)\n" +
                "union\n" +
                "(select 3)", union.toString());
    }


}