package com.vaadin.tests.data.converter;

import static org.junit.Assert.assertEquals;

import java.math.BigInteger;
import java.util.Locale;

import org.junit.Test;

import com.vaadin.data.Result;
import com.vaadin.data.ValueContext;
import com.vaadin.data.converter.StringToBigIntegerConverter;

public class StringToBigIntegerConverterTest
        extends AbstractStringConverterTest {

    @Override
    protected StringToBigIntegerConverter getConverter() {
        return new StringToBigIntegerConverter(getErrorMessage());
    }

    @Test
    public void testValueParsing() {
        String bigInt = "1180591620717411303424"; // 2^70 > 2^63 - 1
        Result<BigInteger> converted = getConverter().convertToModel(bigInt,
                new ValueContext());
        BigInteger expected = new BigInteger(bigInt);
        assertValue("Value bigger than max long was converted incorrectly",
                expected, converted);
    }

    @Test
    public void testValueFormatting() {
        BigInteger bd = new BigInteger("1000");
        String expected = "1.000";

        String converted = getConverter().convertToPresentation(bd,
                new ValueContext(Locale.GERMAN));
        assertEquals("Value with specific locale was converted incorrectly",
                expected, converted);
    }

    @Test
    public void customEmptyValue() {
        StringToBigIntegerConverter converter = new StringToBigIntegerConverter(
                BigInteger.ZERO, getErrorMessage());

        assertValue(BigInteger.ZERO,
                converter.convertToModel("", new ValueContext()));
        assertEquals("0", converter.convertToPresentation(BigInteger.ZERO,
                new ValueContext()));
    }

}