Requirements:
- Implement a driverless Car based on the provided interface that would be capable of moving forward into different directions and turning clockwise in a car park
- The car park would be rectangular in shape with configurable dimensions
- The Car should remember its position and orientation
- An exception will be thrown when the car moves outside the car park boundaries
- Evidence should be provided to demonstrate that the Car implementation meets the acceptance criteria
- Implement as a Maven module, if you need to use any library, use only those available in Maven Central.
Design considerations:
- The Car interface below is provided as a guideline and can be changed
- Future extensibility for new Car features should be kept in mind
- Consider OO modeling for the application
- Keep minimal and viable for the final workable application
Example:
- A simple illustration of the exercise with a car initially positioned at X = 1 and Y = 1 and facing North would look like this on a car park with dimension 4x4:
(Y)
+---+---+---+---+
4 | | | | |
+---+---+---+---+
3 | | | | | N
+---+---+---+---+ W <-|-> E
2 | | | | | S
+---+---+---+---+
1 | C | | | |
+---+---+---+---+
1 2 3 4 (X)
Acceptance Criteria:
- Given the Car is in position X = 1 and Y = 1 and facing North, when the Car turns clockwise, then the Car is still in the same position but is now facing East
- Given the Car is in position X = 1 and Y = 1 and facing North, when the Car moves forward, then the Car is still facing North but is now in position X = 1 and Y = 2
- Given the Car is in position X = 1 and Y = 1 and facing East, when the Car moves forward, then the Car is still facing East but is now in position X = 2 and Y = 1
- Given the Car is in position X = 1 and Y = 1 and facing West, when the Car moves forward, then an exception is thrown
- Given the Car is in position X = 1 and Y = 1 and facing East, when the Car moves forward twice, then the Car is still facing East but is now in position X = 3 and Y = 1
Example Interface:
public interface Car {
void move(String command);
int getPositionX();
int getPositionY();
String getOrientation();
}
Notes:
· Acceptance criteria is what we can verify the functionalities of the application. They should be easy, automatic, repeatable ran and built for maintainability purpose.
写了一个简单和一个稍多一点抽象的两个版本。 两个版本里面都有一些让人看起来不爽的switch语句，先看着吧，有空再干掉它们。
单元测试写了car_test.go、carV1_test.go、command_test.go、park_test.go，分别位于相应目录。
没有怎么认真写，注释是代码的一部分，也相当重要。本人只是简单写了一下注释，代码不复杂，一看明了。
第二版做成了交互式的，用户可以持续输入命令，命令一共有五个，分别是初始化停车场(p或park)、在当前方向上前进(f或forward)、顺时针转向90度(t或turn)、退出(q或quit)和帮助(h或help)，使用方法分别如下：
初始化停车场：p或park，初始化停车场，需要2个参数，分别是停车场的x值和y值
在当前方向上前进：f或forward，需要一个参数，指出向前移动多少
顺时针转向90度：t或turn，不需要参数
退出：q或quit，不需要参数
帮助：h或help，不需要参数
本来想把channel、goroutine、web等东西也加进来玩的，特别是命令部分，可以设计模式里的命令模式来玩，还是先不玩了，时间有限，以后慢慢玩。 以后再把地图搞复杂些，加入障碍物啥的，哈哈哈。