gistfile1.scala

feature("TV power button") {
  scenario(
    "User presses power button when TV is off"
      Given "a TV set that is switched off"
      When "the power button is pressed"
      Then "the TV should switch on"
  ) {
    // Given
    val tv = new TVSet
    assert(!tv.isOn)

    // When
    tv.pressPowerButton()

    // Then
    assert(tv.isOn)
  } 
}