LongConverterTest.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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
 *
 *      https://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.apache.commons.beanutils2.converters;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;

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

import org.apache.commons.beanutils2.ConversionException;
import org.apache.commons.beanutils2.Converter;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

/**
 * Test Case for the LongConverter class.
 */
class LongConverterTest extends AbstractNumberConverterTest<Long> {

    private Converter<Long> converter;

    @Override
    protected Class<Long> getExpectedType() {
        return Long.class;
    }

    @Override
    protected LongConverter makeConverter() {
        return new LongConverter();
    }

    @Override
    protected LongConverter makeConverter(final Long defaultValue) {
        return new LongConverter(defaultValue);
    }

    @BeforeEach
    public void setUp() throws Exception {
        converter = makeConverter();
        numbers[0] = Long.valueOf("-12");
        numbers[1] = Long.valueOf("13");
        numbers[2] = Long.valueOf("-22");
        numbers[3] = Long.valueOf("23");
    }

    @AfterEach
    public void tearDown() throws Exception {
        converter = null;
    }

    /**
     * Test Invalid Amounts (too big/small)
     */
    @Test
    void testInvalidAmount() {
        final Converter<Long> converter = makeConverter();
        final Class<?> clazz = Long.class;
        // Boundaries still convert
        assertEquals(Long.valueOf(Long.MIN_VALUE), converter.convert(clazz, Long.valueOf(Long.MIN_VALUE)), "Minimum");
        assertEquals(Long.valueOf(Long.MAX_VALUE), converter.convert(clazz, Long.valueOf(Long.MAX_VALUE)), "Maximum");
        // Out of range Number values must be rejected, not silently truncated/clamped
        final BigInteger tooSmall = BigInteger.valueOf(Long.MIN_VALUE).multiply(BigInteger.TEN);
        final BigInteger tooBig = BigInteger.valueOf(Long.MAX_VALUE).multiply(BigInteger.TEN);
        assertThrows(ConversionException.class, () -> converter.convert(clazz, tooSmall), "Less than minimum, expected ConversionException");
        assertThrows(ConversionException.class, () -> converter.convert(clazz, tooBig), "More than maximum, expected ConversionException");
    }

    /**
     * A locale-parsed String beyond long range comes back from {@link java.text.DecimalFormat} as a {@link Double} and must be rejected rather than clamped to
     * {@link Long#MAX_VALUE}.
     */
    @Test
    void testLocaleStringOutOfRange() {
        final LongConverter converter = makeConverter();
        converter.setLocale(Locale.US);
        assertThrows(ConversionException.class, () -> converter.convert(Long.class, "99999999999999999999"), "More than maximum, expected ConversionException");
    }

    @Test
    void testSimpleConversion() throws Exception {
        final String[] message = { "from String", "from String", "from String", "from String", "from String", "from String", "from String", "from Byte",
                "from Short", "from Integer", "from Long", "from Float", "from Double" };
        final Object[] input = { String.valueOf(Long.MIN_VALUE), "-17", "-1", "0", "1", "17", String.valueOf(Long.MAX_VALUE), Byte.valueOf((byte) 7),
                Short.valueOf((short) 8), Integer.valueOf(9), Long.valueOf(10), Float.valueOf((float) 11.1), Double.valueOf(12.2) };
        final Long[] expected = { Long.valueOf(Long.MIN_VALUE), Long.valueOf(-17), Long.valueOf(-1), Long.valueOf(0), Long.valueOf(1), Long.valueOf(17),
                Long.valueOf(Long.MAX_VALUE), Long.valueOf(7), Long.valueOf(8), Long.valueOf(9), Long.valueOf(10), Long.valueOf(11), Long.valueOf(12) };
        for (int i = 0; i < expected.length; i++) {
            assertEquals(expected[i], converter.convert(Long.class, input[i]), message[i] + " to Long");
            assertEquals(expected[i], converter.convert(Long.TYPE, input[i]), message[i] + " to long");
            assertEquals(expected[i], converter.convert(null, input[i]), message[i] + " to null type");
        }
    }
}