For testing purpose we need to manipulate with DATE and TIME This class provide all necessary FORMAT of required date and time

DateProvider.groovy

package de.base.utils.AllOthersUtils

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

/**
 * For testing purpose we need to manipulate with DATE and TIME
 * This class provide all necessary FORMAT of required date and time
 */

class DateProvider {

    private static final SimpleDateFormat MONTH_FORMAT = new SimpleDateFormat("MM")
    private static final SimpleDateFormat M_FORMAT = new SimpleDateFormat("M")
    private static final DateFormat NUMBER_DAY_FORMAT = new SimpleDateFormat("dd")
    private static final DateFormat DAY_FORMAT = new SimpleDateFormat("d")
    private static final DateFormat HOURS = new SimpleDateFormat("HH")
    private static final DateFormat HOURS_WZERO = new SimpleDateFormat("H")
    private static final DateFormat MINUTEN = new SimpleDateFormat("mm")
    private static final DateFormat MINUTEN_WZERO = new SimpleDateFormat("m")
    private static final DateFormat SEC = new SimpleDateFormat("ss")
    private static final DateFormat CSV_FORMAT = new SimpleDateFormat("dd.MM.yyyy HH:mm:ss")
    private static final DateFormat CURRENT_DATE_FORMAT = new SimpleDateFormat("dd/MM/yyyy")
    private static final DateFormat API_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZZZZZ")
    private static final DateFormat WEBHOOK_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss")

    static String DATE_TIME = "2017-" + getCurrentMonth() + "-" + getCurrentDay() + "T" + getCurrentHour() + ":" + getCurrentMinute() + ":" + getCurrentSecond() + "+00:00"

    static String getCurrentMonthM() {
        Date date = new Date()
        return M_FORMAT.format(date)
    }

    static String getCurrentMonth() {
        Date date = new Date()
        return MONTH_FORMAT.format(date)
    }

    static String getCurrenDateSlash() {
        Date date = new Date()
        return CURRENT_DATE_FORMAT.format(date)
    }

    static String getModifiedDateSlash(int days) {
        Calendar dd = Calendar.getInstance()
        dd.add(Calendar.DATE, days)
        return CURRENT_DATE_FORMAT.format(dd.getTime())
    }

    static String getFirstDateOfThisMonth() {
        Calendar dd = Calendar.getInstance()
        dd.set(Calendar.DAY_OF_MONTH, 1)
        return CURRENT_DATE_FORMAT.format(dd.getTime())
    }

    static String getFirstDateOfLastMonth() {
        Calendar dd = Calendar.getInstance()
        dd.add(Calendar.MONTH, -1);
        dd.set(Calendar.DAY_OF_MONTH, 0)
        dd.add(Calendar.DATE, 1)
        return CURRENT_DATE_FORMAT.format(dd.getTime())
    }

    static String getLastDateOfLastMonth() {
        Calendar dd = Calendar.getInstance()
        dd.set(Calendar.DATE, 1);
        dd.add(Calendar.DAY_OF_MONTH, -1)
        return CURRENT_DATE_FORMAT.format(dd.getTime())
    }

    static String getCurrentDay() {
        DateFormat dateFormat = NUMBER_DAY_FORMAT
        Date date = new Date()
        return dateFormat.format(date)
    }

    static String getCurrentDayWithoutZero() {
        DateFormat dateFormat = DAY_FORMAT
        Date date = new Date()
        return dateFormat.format(date)
    }

    static String getCurrentHour() {
        Date date = new Date()
        return HOURS.format(date)
    }

    static String getCurrentHourWithoutZero() {
        Date date = new Date()
        return HOURS_WZERO.format(date)
    }

    static String getCurrentMinute() {
        Date date = new Date()
        return MINUTEN.format(date)
    }

    static String getCurrentMinuteWithoutZero() {
        Date date = new Date()
        return MINUTEN_WZERO.format(date)
    }

    static String getModifiedDateCSV(int days) {
        Calendar dd = Calendar.getInstance()
        dd.add(Calendar.DATE, days)
        return CSV_FORMAT.format(dd.getTime())
    }

    static String getModifiedDateCSV(int days, int hours) {
        Calendar dd = Calendar.getInstance()
        dd.add(Calendar.DATE, days)
        dd.add(Calendar.HOUR_OF_DAY, hours)
        return CSV_FORMAT.format(dd.getTime())
    }

    static String getModifiedDateApi(int days, int hours) {
        Calendar dd = Calendar.getInstance()
        dd.add(Calendar.DATE, days)
        dd.add(Calendar.HOUR_OF_DAY, hours)
        return API_FORMAT.format(dd.getTime())
    }

    static String getModifiedDateWebHook(int days, int hours) {
        Calendar dd = Calendar.getInstance()
        dd.add(Calendar.DATE, days)
        dd.add(Calendar.HOUR_OF_DAY, hours)
        return WEBHOOK_FORMAT.format(dd.getTime())
    }

    static String getCurrentSecond() {
        Date date = new Date()
        return SEC.format(date)
    }

    static String getCurrentDayModified(int numberOfDay) {
        Calendar dd = Calendar.getInstance()
        dd.set(Calendar.DAY_OF_MONTH, Integer.parseInt(getCurrentDay()))
        dd.add(Calendar.DAY_OF_MONTH, numberOfDay)
        return NUMBER_DAY_FORMAT.format(dd.getTime())
    }

    static String getCurrentDayModifiedWithoutZero(int numberOfDay) {
        Calendar dd = Calendar.getInstance()
        dd.set(Calendar.DAY_OF_MONTH, Integer.parseInt(getCurrentDay()))
        dd.add(Calendar.DAY_OF_MONTH, numberOfDay)
        return DAY_FORMAT.format(dd.getTime())
    }

    static String getCurrentMonthModified(int numberOfMonth) {
        Calendar dd = Calendar.getInstance()
        dd.set(Calendar.MONTH, Integer.parseInt(getCurrentMonth()))
        dd.add(Calendar.MONTH, numberOfMonth)
        return MONTH_FORMAT.format(dd.getTime())
    }

}