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Java example source code file (TestYears.java)

This example Java source code file (TestYears.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

arithmeticexception, bytearrayinputstream, bytearrayoutputstream, datetime, illegalargumentexception, interval, localdate, objectinputstream, objectoutputstream, p1y, paris, testyears, yearmonthday, years

The TestYears.java Java example source code

/*
 *  Copyright 2001-2013 Stephen Colebourne
 *
 *  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.joda.time;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import junit.framework.TestCase;
import junit.framework.TestSuite;

/**
 * This class is a Junit unit test for Years.
 *
 * @author Stephen Colebourne
 */
public class TestYears extends TestCase {
    // Test in 2002/03 as time zones are more well known
    // (before the late 90's they were all over the place)
    private static final DateTimeZone PARIS = DateTimeZone.forID("Europe/Paris");

    public static void main(String[] args) {
        junit.textui.TestRunner.run(suite());
    }

    public static TestSuite suite() {
        return new TestSuite(TestYears.class);
    }

    public TestYears(String name) {
        super(name);
    }

    protected void setUp() throws Exception {
    }

    protected void tearDown() throws Exception {
    }

    //-----------------------------------------------------------------------
    public void testConstants() {
        assertEquals(0, Years.ZERO.getYears());
        assertEquals(1, Years.ONE.getYears());
        assertEquals(2, Years.TWO.getYears());
        assertEquals(3, Years.THREE.getYears());
        assertEquals(Integer.MAX_VALUE, Years.MAX_VALUE.getYears());
        assertEquals(Integer.MIN_VALUE, Years.MIN_VALUE.getYears());
    }

    //-----------------------------------------------------------------------
    public void testFactory_years_int() {
        assertSame(Years.ZERO, Years.years(0));
        assertSame(Years.ONE, Years.years(1));
        assertSame(Years.TWO, Years.years(2));
        assertSame(Years.THREE, Years.years(3));
        assertSame(Years.MAX_VALUE, Years.years(Integer.MAX_VALUE));
        assertSame(Years.MIN_VALUE, Years.years(Integer.MIN_VALUE));
        assertEquals(-1, Years.years(-1).getYears());
        assertEquals(4, Years.years(4).getYears());
    }

    //-----------------------------------------------------------------------
    public void testFactory_yearsBetween_RInstant() {
        DateTime start = new DateTime(2006, 6, 9, 12, 0, 0, 0, PARIS);
        DateTime end1 = new DateTime(2009, 6, 9, 12, 0, 0, 0, PARIS);
        DateTime end2 = new DateTime(2012, 6, 9, 12, 0, 0, 0, PARIS);
        
        assertEquals(3, Years.yearsBetween(start, end1).getYears());
        assertEquals(0, Years.yearsBetween(start, start).getYears());
        assertEquals(0, Years.yearsBetween(end1, end1).getYears());
        assertEquals(-3, Years.yearsBetween(end1, start).getYears());
        assertEquals(6, Years.yearsBetween(start, end2).getYears());
    }

    @SuppressWarnings("deprecation")
    public void testFactory_yearsBetween_RPartial() {
        LocalDate start = new LocalDate(2006, 6, 9);
        LocalDate end1 = new LocalDate(2009, 6, 9);
        YearMonthDay end2 = new YearMonthDay(2012, 6, 9);
        
        assertEquals(3, Years.yearsBetween(start, end1).getYears());
        assertEquals(0, Years.yearsBetween(start, start).getYears());
        assertEquals(0, Years.yearsBetween(end1, end1).getYears());
        assertEquals(-3, Years.yearsBetween(end1, start).getYears());
        assertEquals(6, Years.yearsBetween(start, end2).getYears());
    }

    public void testFactory_yearsIn_RInterval() {
        DateTime start = new DateTime(2006, 6, 9, 12, 0, 0, 0, PARIS);
        DateTime end1 = new DateTime(2009, 6, 9, 12, 0, 0, 0, PARIS);
        DateTime end2 = new DateTime(2012, 6, 9, 12, 0, 0, 0, PARIS);
        
        assertEquals(0, Years.yearsIn((ReadableInterval) null).getYears());
        assertEquals(3, Years.yearsIn(new Interval(start, end1)).getYears());
        assertEquals(0, Years.yearsIn(new Interval(start, start)).getYears());
        assertEquals(0, Years.yearsIn(new Interval(end1, end1)).getYears());
        assertEquals(6, Years.yearsIn(new Interval(start, end2)).getYears());
    }

    public void testFactory_parseYears_String() {
        assertEquals(0, Years.parseYears((String) null).getYears());
        assertEquals(0, Years.parseYears("P0Y").getYears());
        assertEquals(1, Years.parseYears("P1Y").getYears());
        assertEquals(-3, Years.parseYears("P-3Y").getYears());
        assertEquals(2, Years.parseYears("P2Y0M").getYears());
        assertEquals(2, Years.parseYears("P2YT0H0M").getYears());
        try {
            Years.parseYears("P1M1D");
            fail();
        } catch (IllegalArgumentException ex) {
            // expeceted
        }
        try {
            Years.parseYears("P1YT1H");
            fail();
        } catch (IllegalArgumentException ex) {
            // expeceted
        }
    }

    //-----------------------------------------------------------------------
    public void testGetMethods() {
        Years test = Years.years(20);
        assertEquals(20, test.getYears());
    }

    public void testGetFieldType() {
        Years test = Years.years(20);
        assertEquals(DurationFieldType.years(), test.getFieldType());
    }

    public void testGetPeriodType() {
        Years test = Years.years(20);
        assertEquals(PeriodType.years(), test.getPeriodType());
    }

    //-----------------------------------------------------------------------
    public void testIsGreaterThan() {
        assertEquals(true, Years.THREE.isGreaterThan(Years.TWO));
        assertEquals(false, Years.THREE.isGreaterThan(Years.THREE));
        assertEquals(false, Years.TWO.isGreaterThan(Years.THREE));
        assertEquals(true, Years.ONE.isGreaterThan(null));
        assertEquals(false, Years.years(-1).isGreaterThan(null));
    }

    public void testIsLessThan() {
        assertEquals(false, Years.THREE.isLessThan(Years.TWO));
        assertEquals(false, Years.THREE.isLessThan(Years.THREE));
        assertEquals(true, Years.TWO.isLessThan(Years.THREE));
        assertEquals(false, Years.ONE.isLessThan(null));
        assertEquals(true, Years.years(-1).isLessThan(null));
    }

    //-----------------------------------------------------------------------
    public void testToString() {
        Years test = Years.years(20);
        assertEquals("P20Y", test.toString());
        
        test = Years.years(-20);
        assertEquals("P-20Y", test.toString());
    }

    //-----------------------------------------------------------------------
    public void testSerialization() throws Exception {
        Years test = Years.THREE;
        
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);
        oos.writeObject(test);
        oos.close();
        byte[] bytes = baos.toByteArray();
        
        ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
        ObjectInputStream ois = new ObjectInputStream(bais);
        Years result = (Years) ois.readObject();
        ois.close();
        
        assertSame(test, result);
    }

    //-----------------------------------------------------------------------
    public void testPlus_int() {
        Years test2 = Years.years(2);
        Years result = test2.plus(3);
        assertEquals(2, test2.getYears());
        assertEquals(5, result.getYears());
        
        assertEquals(1, Years.ONE.plus(0).getYears());
        
        try {
            Years.MAX_VALUE.plus(1);
            fail();
        } catch (ArithmeticException ex) {
            // expected
        }
    }

    public void testPlus_Years() {
        Years test2 = Years.years(2);
        Years test3 = Years.years(3);
        Years result = test2.plus(test3);
        assertEquals(2, test2.getYears());
        assertEquals(3, test3.getYears());
        assertEquals(5, result.getYears());
        
        assertEquals(1, Years.ONE.plus(Years.ZERO).getYears());
        assertEquals(1, Years.ONE.plus((Years) null).getYears());
        
        try {
            Years.MAX_VALUE.plus(Years.ONE);
            fail();
        } catch (ArithmeticException ex) {
            // expected
        }
    }

    public void testMinus_int() {
        Years test2 = Years.years(2);
        Years result = test2.minus(3);
        assertEquals(2, test2.getYears());
        assertEquals(-1, result.getYears());
        
        assertEquals(1, Years.ONE.minus(0).getYears());
        
        try {
            Years.MIN_VALUE.minus(1);
            fail();
        } catch (ArithmeticException ex) {
            // expected
        }
    }

    public void testMinus_Years() {
        Years test2 = Years.years(2);
        Years test3 = Years.years(3);
        Years result = test2.minus(test3);
        assertEquals(2, test2.getYears());
        assertEquals(3, test3.getYears());
        assertEquals(-1, result.getYears());
        
        assertEquals(1, Years.ONE.minus(Years.ZERO).getYears());
        assertEquals(1, Years.ONE.minus((Years) null).getYears());
        
        try {
            Years.MIN_VALUE.minus(Years.ONE);
            fail();
        } catch (ArithmeticException ex) {
            // expected
        }
    }

    public void testMultipliedBy_int() {
        Years test = Years.years(2);
        assertEquals(6, test.multipliedBy(3).getYears());
        assertEquals(2, test.getYears());
        assertEquals(-6, test.multipliedBy(-3).getYears());
        assertSame(test, test.multipliedBy(1));
        
        Years halfMax = Years.years(Integer.MAX_VALUE / 2 + 1);
        try {
            halfMax.multipliedBy(2);
            fail();
        } catch (ArithmeticException ex) {
            // expected
        }
    }

    public void testDividedBy_int() {
        Years test = Years.years(12);
        assertEquals(6, test.dividedBy(2).getYears());
        assertEquals(12, test.getYears());
        assertEquals(4, test.dividedBy(3).getYears());
        assertEquals(3, test.dividedBy(4).getYears());
        assertEquals(2, test.dividedBy(5).getYears());
        assertEquals(2, test.dividedBy(6).getYears());
        assertSame(test, test.dividedBy(1));
        
        try {
            Years.ONE.dividedBy(0);
            fail();
        } catch (ArithmeticException ex) {
            // expected
        }
    }

    public void testNegated() {
        Years test = Years.years(12);
        assertEquals(-12, test.negated().getYears());
        assertEquals(12, test.getYears());
        
        try {
            Years.MIN_VALUE.negated();
            fail();
        } catch (ArithmeticException ex) {
            // expected
        }
    }

    //-----------------------------------------------------------------------
    public void testAddToLocalDate() {
        Years test = Years.years(3);
        LocalDate date = new LocalDate(2006, 6, 1);
        LocalDate expected = new LocalDate(2009, 6, 1);
        assertEquals(expected, date.plus(test));
    }

}

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