// 走行中にはPへのシフトを無視する
@Test
public void ignoresShiftToParkWhileInDrive() {
transmission.shift(Gear.DRIVE);
car.accelerateTo(30);
transmission.shift(Gear.PARK);
assertThat(transmission.getGear(), equalTo(Gear.DRIVE));
}
// 停止中はPにシフトできる
@Test
public void allowsShiftToParkWhenNotMoving() {
transmission.shift(Gear.DRIVE);
car.accelerateTo(30);
car.brakeToStop();
transmission.shift(Gear.PARK);
assertThat(transmission.getGear(), equalTo(Gear.PARK));
}
// 加速を始めたらDの状態を保つ
@Test
public void remainsInDriveAfterAcceleration() {
transmission.shift(Gear.DRIVE);
car.accelerateTo(35);
assertThat(transmission.getGear(), equalTo(Gear.DRIVE));
}