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• 0.03
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• Expectation.scala

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com.github.pawelkrol.CommTest.Expectation.scala Maven / Gradle / Ivy

package com.github.pawelkrol.CommTest

class Expectation[T](code: () => T) {

  private def validateNoChange[T](code: () => T, predicate: () => T) {
    val initial = predicate()
    code()
    val ending = predicate()
    assert(initial == ending, "expected that '%s' does not change, but it changed to '%s'".format(initial, ending))
  }

  def toChange[T](predicate: => T) = ChangeValidator(code, () => predicate)

  def notToChange[T](predicate: => T) = validateNoChange(code, () => predicate)
}

object Expectation {

  def apply[T](code: () => T) = new Expectation(code)
}