package org.exist.xquery.value;

import java.util.Arrays;

import org.exist.xquery.XPathException;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameter;
import org.junit.runners.Parameterized.Parameters;

import static org.junit.Assert.assertEquals;

/**
 *
 * @author <a href="mailto:piotr@ideanest.com">Piotr Kaminski</a>
 */
@RunWith(Parameterized.class)
public class NumericOpPromotionTest {

    @Parameters(name = "{0}")
    public static java.util.Collection<Object[]> data() {
        return Arrays.asList(new Object[][]{
                {"decimal", new DecimalValue(VALUE)},
                {"double", new DoubleValue(VALUE)},
                {"float", new FloatValue((float) VALUE)}
        });
    }

    @Parameter
    public String typeName;

    @Parameter(value = 1)
    public ComputableValue operand;

	private static final double VALUE = 1.5;
	private static final IntegerValue ZERO = new IntegerValue(0), ONE = new IntegerValue(1);

    @Test
	public void integerDiv() throws XPathException {
		assertDoubleValue(VALUE, operand.div(ONE));
	}

    @Test
	public void integerMult() throws XPathException {
		assertDoubleValue(VALUE, operand.mult(ONE));
	}

    @Test
	public void integerPlus() throws XPathException {
		assertDoubleValue(VALUE, operand.plus(ZERO));
	}

    @Test
	public void integerMinus() throws XPathException {
		assertDoubleValue(VALUE, operand.minus(ZERO));
	}

    private void assertDoubleValue(double target, ComputableValue result) throws XPathException {
        assertEquals(target, (result.toJavaObject(Double.class)).doubleValue(), 0);
    }
}