如何在groovy中创建动态日期生成器

Question

我有一个简单的日期生成器代码，它选择从现在到120天的日期。

但是，我希望我的约会更聪明一些。我只希望它只选择月份五月，六月，七月和八月。

因此，如果当前日期<五月之前 ，则在今年的四个月中的一个月内随机选择一个日期。
否则，如果当前日期 过去六月 ，则从明年的4个月中选择一个日期。

怎么能用groovy写的？

以下是当前日期生成器。

//Defines Start and End Dates for holiday departure date search
Random random = new Random();
date = new Date()
def startDate = date + random.nextInt(100 + 120)
sDate = startDate.format("yyyy-MM-dd")

testRunner.testCase.testSuite.setPropertyValue('arrivaldate', sDate);

Answer 1

（经过op 澄清后编辑）

def getRandomDate(Date now, Random random) {
  def year         = now.year + (now.month > 5 ? 1 : 0)
  def allDates     = (new Date(year, 4, 1)..new Date(year, 7, 31))
  def allowedDates = allDates.findAll { now < it }

  allowedDates[random.nextInt(allowedDates.size())]
}

// example usage
def now    = new Date()
def random = new Random()

100.times { 
  def today      = now + it*3
  def randomDate = getRandomDate(now+it*3, random)
  println "today: ${today.format('yyyy MMM dd')} ==> random date: ${randomDate.format('yyyy MMM dd')}"
}

执行上述操作后会打印出以下内容：

today: 2017 Feb 25 ==> random date: 2017 Jul 21
today: 2017 Feb 28 ==> random date: 2017 Aug 03
today: 2017 Mar 03 ==> random date: 2017 Jun 21
today: 2017 Mar 06 ==> random date: 2017 May 21
today: 2017 Mar 09 ==> random date: 2017 Jun 05
today: 2017 Mar 12 ==> random date: 2017 May 03
today: 2017 Mar 15 ==> random date: 2017 Aug 04
today: 2017 Mar 18 ==> random date: 2017 Aug 17
today: 2017 Mar 21 ==> random date: 2017 Jul 09
today: 2017 Mar 24 ==> random date: 2017 Jul 11
today: 2017 Mar 27 ==> random date: 2017 Jul 16
today: 2017 Mar 30 ==> random date: 2017 Aug 09
today: 2017 Apr 02 ==> random date: 2017 Jul 09
today: 2017 Apr 05 ==> random date: 2017 Aug 05
today: 2017 Apr 08 ==> random date: 2017 Jul 19
today: 2017 Apr 11 ==> random date: 2017 Aug 10
today: 2017 Apr 14 ==> random date: 2017 Jun 21
today: 2017 Apr 17 ==> random date: 2017 Aug 03
today: 2017 Apr 20 ==> random date: 2017 May 02
today: 2017 Apr 23 ==> random date: 2017 Jul 04
today: 2017 Apr 26 ==> random date: 2017 Jun 13
today: 2017 Apr 29 ==> random date: 2017 May 02
today: 2017 May 02 ==> random date: 2017 Aug 01
today: 2017 May 05 ==> random date: 2017 Aug 07
today: 2017 May 08 ==> random date: 2017 Aug 20
today: 2017 May 11 ==> random date: 2017 Jun 29
today: 2017 May 14 ==> random date: 2017 May 18
today: 2017 May 17 ==> random date: 2017 Jun 11
today: 2017 May 20 ==> random date: 2017 May 26
today: 2017 May 23 ==> random date: 2017 Jul 06
today: 2017 May 26 ==> random date: 2017 Aug 29
today: 2017 May 29 ==> random date: 2017 Jun 02
today: 2017 Jun 01 ==> random date: 2017 Jun 09
today: 2017 Jun 04 ==> random date: 2017 Jun 07
today: 2017 Jun 07 ==> random date: 2017 Aug 09
today: 2017 Jun 10 ==> random date: 2017 Aug 02
today: 2017 Jun 13 ==> random date: 2017 Aug 04
today: 2017 Jun 16 ==> random date: 2017 Aug 09
today: 2017 Jun 19 ==> random date: 2017 Jun 22
today: 2017 Jun 22 ==> random date: 2017 Aug 16
today: 2017 Jun 25 ==> random date: 2017 Aug 13
today: 2017 Jun 28 ==> random date: 2017 Jul 05
today: 2017 Jul 01 ==> random date: 2018 Jun 18
today: 2017 Jul 04 ==> random date: 2018 Jul 29
today: 2017 Jul 07 ==> random date: 2018 Jul 13
today: 2017 Jul 10 ==> random date: 2018 Jul 26
today: 2017 Jul 13 ==> random date: 2018 Aug 23
today: 2017 Jul 16 ==> random date: 2018 Aug 12
today: 2017 Jul 19 ==> random date: 2018 Aug 24
today: 2017 Jul 22 ==> random date: 2018 Aug 20
today: 2017 Jul 25 ==> random date: 2018 Jul 28
today: 2017 Jul 28 ==> random date: 2018 Jul 29
today: 2017 Jul 31 ==> random date: 2018 May 02
today: 2017 Aug 03 ==> random date: 2018 Jul 19
today: 2017 Aug 06 ==> random date: 2018 Aug 05
today: 2017 Aug 09 ==> random date: 2018 Aug 28
today: 2017 Aug 12 ==> random date: 2018 Jul 16
today: 2017 Aug 15 ==> random date: 2018 Aug 04
today: 2017 Aug 18 ==> random date: 2018 May 30
today: 2017 Aug 21 ==> random date: 2018 May 02
today: 2017 Aug 24 ==> random date: 2018 May 01
today: 2017 Aug 27 ==> random date: 2018 May 10
today: 2017 Aug 30 ==> random date: 2018 May 04
today: 2017 Sep 02 ==> random date: 2018 Jun 30
today: 2017 Sep 05 ==> random date: 2018 May 05
today: 2017 Sep 08 ==> random date: 2018 Jul 27
today: 2017 Sep 11 ==> random date: 2018 Aug 14
today: 2017 Sep 14 ==> random date: 2018 Jul 15
today: 2017 Sep 17 ==> random date: 2018 Jul 12
today: 2017 Sep 20 ==> random date: 2018 Jul 24
today: 2017 Sep 23 ==> random date: 2018 Aug 28
today: 2017 Sep 26 ==> random date: 2018 Jul 26
today: 2017 Sep 29 ==> random date: 2018 Jun 27
today: 2017 Oct 02 ==> random date: 2018 Aug 15
today: 2017 Oct 05 ==> random date: 2018 Jun 27
today: 2017 Oct 08 ==> random date: 2018 Jun 01
today: 2017 Oct 11 ==> random date: 2018 Jun 12
today: 2017 Oct 14 ==> random date: 2018 Jun 06
today: 2017 Oct 17 ==> random date: 2018 Aug 02
today: 2017 Oct 20 ==> random date: 2018 May 05
today: 2017 Oct 23 ==> random date: 2018 Jun 15
today: 2017 Oct 26 ==> random date: 2018 Jun 05
today: 2017 Oct 29 ==> random date: 2018 Aug 12
today: 2017 Nov 01 ==> random date: 2018 Aug 29
today: 2017 Nov 04 ==> random date: 2018 May 15
today: 2017 Nov 07 ==> random date: 2018 Jul 03
today: 2017 Nov 10 ==> random date: 2018 Aug 16
today: 2017 Nov 13 ==> random date: 2018 Aug 21
today: 2017 Nov 16 ==> random date: 2018 May 06
today: 2017 Nov 19 ==> random date: 2018 Jul 15
today: 2017 Nov 22 ==> random date: 2018 Jul 03
today: 2017 Nov 25 ==> random date: 2018 Aug 15
today: 2017 Nov 28 ==> random date: 2018 Jul 29
today: 2017 Dec 01 ==> random date: 2018 May 06
today: 2017 Dec 04 ==> random date: 2018 Aug 31
today: 2017 Dec 07 ==> random date: 2018 May 12
today: 2017 Dec 10 ==> random date: 2018 May 01
today: 2017 Dec 13 ==> random date: 2018 Aug 31
today: 2017 Dec 16 ==> random date: 2018 Jul 17
today: 2017 Dec 19 ==> random date: 2018 Jul 24

基本上，我们从允许日期列表中选择一个随机日期。

通过不在每次通话中创建allowedDates列表，可以提高性能。

不推荐使用某些日期方法。如果弃用很重要，您可能希望改用Calendar。

日期中的groovy范围..运算符返回一个日期范围，其中包含两个给定日期之间的所有日期（包括两者）。

我已将now留在方法的外部以使测试更容易，并且我已将random留在方法的外部，因为我相信在每次调用时重新创建随机的新实例都会对质量产生不利影响生成的随机分布。

注1：对于5月1日到6月30日之间的日期，问题定义不明确。对于这些日期，代码返回当前年份的随机日期，不包括过去的日期。即在6月15日，该算法将从今年6月16日到8月31日之间返回一个随机日期。 7月1日，它将从明年5月1日到8月31日之间返回一个随机日期。

注2：备用版本没有弃用日期调用并使用日历：

import static java.util.Calendar.*
import java.util.GregorianCalendar as Cal

def getRandomDate(Date now, Random random) {
  def cal = new Cal(time: now)

  // use current year if current date is before july, otherwise next year
  def year         = cal.get(YEAR) + (cal.get(MONTH) > 5 ? 1 : 0)
  def allDates     = (new Cal(year, 4, 1).time..new Cal(year, 7, 31).time)
  def allowedDates = allDates.findAll { now < it }

  allowedDates[random.nextInt(allowedDates.size())]
}

Answer 2

这是Groovy脚本，可以完成您的预期工作。

请注意，如果当前日期属于问题中缺少的日期范围，则下面的脚本会引发错误。

  

5月1日至6月30日期间未实施

请按照内联评论进行操作。

import groovy.time.TimeCategory

def dateFormat = 'yyyy-MM-dd'

def getNumberInRange = { min, max -> new Random().nextInt(max + 1 - min) + min }

def isTodayBeforeMay = { Calendar.MONTH < 5 }

def isTodayAfterJune = { Calendar.MONTH > 6 }

//Get the number of days between today and given date
def getDifferenceDays = { targetDate, closure ->
    def strDate = closure (targetDate)
    def futureDate = new Date().parse(dateFormat, strDate)
    TimeCategory.minus(futureDate, new Date()).days
}

//Get the offset between today and max date i.e.,31 august
def getOffSetDays = { date ->
    //Need to change the date range if needed.
    //As per OP, May to August is mentioned below
    def max = getDifferenceDays(date) { "${it[Calendar.YEAR]}-08-31" }
    def min = getDifferenceDays(date) { "${it[Calendar.YEAR]}-05-01" }
    getNumberInRange(min, max)
}


def now = new Date()
def nextYearNow = now.updated(year: now[Calendar.YEAR] + 1)

def selected
def finalDate

println "Today : $now"
println "Next year same date : $nextYearNow"

if (isTodayBeforeMay()) {
    selected = now    
} else if (isTodayAfterJune()) {
    selected = nextYearNow
} else {
    //It is not mentioned what should happened for the mentioned period by OP
    throw new Error("Not implemented for the days between 1st May to 30th June")
}

def offset = getOffSetDays(selected)

//Add the offset days to now
use(TimeCategory) {
    finalDate = now + offset.days
}
println "Final future date is : $finalDate"
println "Final future date is(formatted) : ${finalDate.format(dateFormat)}"

//set the date at test case level property
context.testCase.setPropertyValue('NEXT_DATE', finalDate.format(dateFormat))

为了评估日期

• 在请求中使用${#TestCase#NEXT_DATE}
• 在groovy脚本中使用context.expand('${#TestCase#NEXT_DATE}')（返回字符串）

注意：如果您想在soapui工具中查看输出，可以在上面的脚本中用println替换 log.info。否则，print语句将显示在日志文件中。

您可以在线快速尝试上述脚本 Demo

<强>输出：