PE6.scala

"handle deposit and successful withdrawal" in withTestDriver 
  { driver =>
    val t1 = Instant.now
    val t2 = t1.plusSeconds(100)

    val outcome = driver.run(DepositCmd(t1, "Opening deposit", 100))
    outcome.replies should contain only 100

    val outcome2 = driver.run(WithdrawCmd(t2, "Transfer to savings", 20))
    outcome2.replies should contain only SuccessfulWithdrawalResponse(80)
    outcome2.issues should be(Nil)
    outcome2.state should ===(AccountState(80))
    outcome2.events should ===(Vector(WithdrawEvt(t2, "Transfer to savings", 20)))
  }
"handle deposit and failed withdrawal" in withTestDriver 
  { driver =>
    val outcome = driver.run(DepositCmd(Instant.now, "Opening deposit", 100))
    outcome.replies should contain only 100

    val outcome2 = driver.run(WithdrawCmd(Instant.now, "Transfer to savings", 200))
    outcome2.replies should contain only FailedWithdrawalResponse("Insufficient funds (current balance 100)")
}