How to use specs2 to assert a Date is equal to another Date if their difference is less than 1 second?

Question

I'm writing a specs2 test, and need to compare two dates:

import java.util.Date

val date1: Date = getDate1();
val date2: Date = getDate2();

date1 must beEqualToAnotherDate(date2, 1.second)

There is no such beEqualToAnotherDate matcher, how can I do the same in specs2 efficiently?

Answer 1

If you want a custom matcher, you can try something like:

import java.util.Date

import org.specs2.matcher.{
  Expectable,
  Matcher,
  MatchResult,
  MatchersImplicits,
  Specification
}

object MySpecs extends Specification with MatchersImplicits {

  def beCloseInTimeTo(date: Date, timeDiff: Int) = new Matcher[Date] {
    def apply[D <: Date](e: Expectable[D]) = 
      result((e.value.getTime - date.getTime) < timeDiff,
        "Dates are nearly at the same time",
        "Dates are different",
        e)
  }

  dateA must beCloseInTimeTo(dateB, timeInMillis)
}