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Groovy example source code file (DateGDKTest.groovy)

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

Java - Groovy tags/keywords

calendar, date, date, dategdktest, gmt, groovytestcase, locale, locale, mmm, simpledateformat, string, string, text, timezone, timezone

The Groovy DateGDKTest.groovy source code

/*
 * Copyright 2003-2011 the original author or authors.
 *
 * 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.codehaus.groovy.runtime

import java.text.DateFormat
import java.text.SimpleDateFormat

/**
 * @author tnichols
 */
class DateGDKTest extends GroovyTestCase {

    void testGDKDateMethods() {
        Locale defaultLocale = Locale.default
        TimeZone defaultTZ = TimeZone.default
        Locale locale = Locale.UK
        Locale.setDefault locale // set this otherwise the test will fail if your locale isn't the same
        TimeZone.setDefault TimeZone.getTimeZone('Etc/GMT')
        Date d = new Date(0)
//        println d.dateString
//        println d.timeString
//        println d.dateTimeString
        assertEquals '1970-01-01', d.format('yyyy-MM-dd')
        assertEquals DateFormat.getDateInstance(DateFormat.SHORT, locale).format(d), d.dateString
        assertEquals '01/01/70', d.dateString
        assertEquals DateFormat.getTimeInstance(DateFormat.MEDIUM, locale).format(d), d.timeString
        assertEquals '00:00:00', d.timeString
        assertEquals DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.MEDIUM, locale).format(d), d.dateTimeString
        assertEquals '01/01/70 00:00:00', d.dateTimeString

        Locale.default = defaultLocale
        TimeZone.setDefault defaultTZ
    }

    void testStaticParse() {
        TimeZone defaultTZ = TimeZone.default
        TimeZone.setDefault TimeZone.getTimeZone('Etc/GMT')

        Date d = Date.parse('yy/MM/dd hh:mm:ss', '70/01/01 00:00:00')
        assertEquals 0, d.time

        TimeZone.setDefault defaultTZ
    }

    void testRoundTrip() {
        Date d = new Date()
        String pattern = 'dd MMM yyyy, hh:mm:ss,SSS a z'
        String out = d.format(pattern)

        Date d2 = Date.parse(pattern, out)

        assertEquals d.time, d2.time
    }

    void testCalendarTimeZone() {
        Locale defaultLocale = Locale.default
        TimeZone defaultTZ = TimeZone.default
        Locale locale = Locale.UK
        Locale.setDefault locale // set this otherwise the test will fail if your locale isn't the same
        TimeZone.setDefault TimeZone.getTimeZone('Etc/GMT')

        def offset = 8
        def notLocalTZ = TimeZone.getTimeZone("GMT-$offset")
        Calendar cal = Calendar.getInstance(notLocalTZ)
//        println cal.time.format( 'MM/dd/yyyy HH:mm:ss' )
//        println cal.format( 'MM/dd/yyyy HH:mm:ss' )
        def offsetHr = cal.format('HH') as int
        def hr = cal.time.format('HH') as int

        if (hr < offset) hr += 24 // if GMT hr has rolled over to next day
        // offset should be 8 hours behind GMT:
        assertEquals(offset, hr - offsetHr)

        Locale.default = defaultLocale
        TimeZone.setDefault defaultTZ
    }

    static SimpleDateFormat f = new SimpleDateFormat('MM/dd/yyyy')

    static java.sql.Date sqlDate(String s) {
        return new java.sql.Date(f.parse(s).time)
    }

    void testMinusDates() {
        assertEquals(10, f.parse("1/11/2007") - f.parse("1/1/2007"))
        assertEquals(-10, f.parse("1/1/2007") - f.parse("1/11/2007"))
        assertEquals(375, f.parse("1/11/2008") - f.parse("1/1/2007"))
        assertEquals(356, f.parse("1/1/2008") - f.parse("1/10/2007"))
        assertEquals(1, f.parse("7/12/2007") - f.parse("7/11/2007"))
        assertEquals(0, f.parse("1/1/2007") - f.parse("1/1/2007"))
        assertEquals(-1, f.parse("12/31/2007") - f.parse("1/1/2008"))
        assertEquals(365, f.parse("1/1/2008") - f.parse("1/1/2007"))
        assertEquals(36525, f.parse("1/1/2008") - f.parse("1/1/1908"))

        assertEquals(1, sqlDate("7/12/2007") - f.parse("7/11/2007"))
        assertEquals(0, sqlDate("1/1/2007") - sqlDate("1/1/2007"))
        assertEquals(-1, f.parse("12/31/2007") - sqlDate("1/1/2008"))
        assertEquals(365, sqlDate("1/1/2008") - sqlDate("1/1/2007"))
        assertEquals(36525, f.parse("1/1/2008") - sqlDate("1/1/1908"))

        Date d = f.parse("7/4/1776");
        assertEquals(44, (d + 44) - d);

        java.sql.Date sqld = sqlDate("7/4/1776");
        assertEquals(-4444, (sqld - 4444) - sqld);
    }

    /** GROOVY-3374 & GROOVY-4788 */
    void testClearTime() {
        def dateNow = new Date().clearTime()

        def calendarNow = Calendar.getInstance()
        calendarNow.clearTime()

        assert dateNow == calendarNow.time

        assert calendarNow.get(Calendar.HOUR) == 0
        assert calendarNow.get(Calendar.MINUTE) == 0
        assert calendarNow.get(Calendar.SECOND) == 0
        assert calendarNow.get(Calendar.MILLISECOND) == 0
    }
}

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