BigDecimalConversionUtilTest.java

/*
 * Copyright 2004-2012 the Seasar Foundation and the Others.
 *
 * 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 org.seasar.util.convert;

import java.math.BigDecimal;
import java.math.BigInteger;

import junit.framework.TestCase;

/**
 * @author koichik
 * 
 */
public class BigDecimalConversionUtilTest extends TestCase {
    private static final BigDecimal ZERO = new BigDecimal("0");

    /**
     * @throws Exception
     */
    public void testToBigDecimal() throws Exception {
        assertNull(BigDecimalConversionUtil.toBigDecimal(null));
        assertSame(ZERO, BigDecimalConversionUtil.toBigDecimal(ZERO));
        assertEquals(
            new BigDecimal("1"),
            BigDecimalConversionUtil.toBigDecimal(Byte.valueOf((byte) 1)));
        assertEquals(
            new BigDecimal("10"),
            BigDecimalConversionUtil.toBigDecimal(Short.valueOf((short) 10)));
        assertEquals(
            new BigDecimal("100"),
            BigDecimalConversionUtil.toBigDecimal(Integer.valueOf(100)));
        assertEquals(
            new BigDecimal("1000"),
            BigDecimalConversionUtil.toBigDecimal(Long.valueOf(1000L)));

        assertEquals(
            0,
            new BigDecimal("0.1").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Float(0.1F))));

        assertEquals(
            0,
            new BigDecimal("0.1").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Double(0.1D))));
        assertEquals(
            0,
            new BigDecimal("0.01").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Double(0.01D))));
        assertEquals(
            0,
            new BigDecimal("0.001").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Double(0.001D))));
        assertEquals(
            0,
            new BigDecimal("0.0001").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Double(0.0001D))));
        assertEquals(
            0,
            new BigDecimal("0.00001").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Double(0.00001D))));
        assertEquals(
            0,
            new BigDecimal("0.0000001").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Double(0.0000001D))));

        assertEquals(
            0,
            new BigDecimal("0.123").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Double(0.123D))));
        assertEquals(
            0,
            new BigDecimal("0.0123").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Double(0.0123D))));
        assertEquals(
            0,
            new BigDecimal("0.00123").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Double(0.00123D))));
        assertEquals(
            0,
            new BigDecimal("0.000123").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Double(0.000123D))));
        assertEquals(
            0,
            new BigDecimal("0.0000123").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Double(0.0000123D))));
        assertEquals(
            0,
            new BigDecimal("0.00000123").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Double(0.00000123D))));
        assertEquals(
            0,
            new BigDecimal("0.000000123").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Double(0.000000123D))));
        assertEquals(
            0,
            new BigDecimal("0.0000000123").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Double(0.0000000123D))));
        assertEquals(
            0,
            new BigDecimal("0.00000000123").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Double(0.00000000123D))));

        assertEquals(
            0,
            new BigDecimal("0.000000123").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Double(1.23E-7))));
        assertEquals(
            0,
            new BigDecimal("1.23E-7").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Double(0.000000123))));
        assertEquals(
            0,
            new BigDecimal("1.23E-10").compareTo(BigDecimalConversionUtil
                .toBigDecimal(new Double(0.000000000123))));

        assertEquals(
            0,
            new BigDecimal("100.00").compareTo(BigDecimalConversionUtil
                .toBigDecimal("100.00")));
        assertEquals(
            0,
            new BigDecimal("0.000000123").compareTo(BigDecimalConversionUtil
                .toBigDecimal("1.23E-7")));
        assertEquals(
            0,
            new BigDecimal("1.23E-7").compareTo(BigDecimalConversionUtil
                .toBigDecimal("0.000000123")));
    }

    /**
     * @throws Exception
     */
    public void testToBigDecimalForEmptyString() throws Exception {
        assertNull(BigDecimalConversionUtil.toBigDecimal(""));
    }

    /**
     * @throws Exception
     */
    public void testBigDouble() throws Exception {
        assertEquals(
            "12500000",
            BigDecimalConversionUtil.toBigDecimal(12500000D).toString());
    }

    /**
     * @throws Exception
     */
    public void testToString() throws Exception {
        BigDecimal d = new BigDecimal(new BigInteger("125"), -1);
        assertEquals("1250", BigDecimalConversionUtil.toString(d));
    }
}