ConstantHidingExpressionTest.java

package com.querydsl.core.support;

import static org.junit.Assert.assertEquals;

import org.junit.Test;

import com.querydsl.core.Tuple;
import com.querydsl.core.types.FactoryExpression;
import com.querydsl.core.types.Projections;
import com.querydsl.core.types.dsl.Expressions;

public class ConstantHidingExpressionTest {

    @Test
    public void constants_hidden() {
        FactoryExpression<Tuple> tuple = Projections.tuple(
                Expressions.stringPath("str"),
                Expressions.TRUE,
                Expressions.FALSE.as("false"),
                Expressions.constant(1));
        FactoryExpression<Tuple> wrapped = new ConstantHidingExpression<Tuple>(tuple);
        assertEquals(1, wrapped.getArgs().size());
        Tuple t = wrapped.newInstance("s");

        assertEquals("s", t.get(Expressions.stringPath("str")));
        assertEquals(Boolean.TRUE, t.get(Expressions.TRUE));
        assertEquals(Boolean.FALSE, t.get(Expressions.FALSE.as("false")));
        assertEquals(Integer.valueOf(1), t.get(Expressions.constant(1)));
    }

}