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黑墨水鱼
2022-04-28 12:06:09 +08:00
parent e94a64535b
commit 59807092f1
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assignment5/Question3/StartGrading.java Normal file
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//Q3
public class StartGrading {
public static void testVehicle() {
//The Vehicle class is abstract. We cannot create objects from this class. Therefore, we cannot test anything
}
public static void testCar() {
// test case for constructors
try {
// exception
Car c1 = new Car(70, 80);
} catch (BadSpeedSetting e) {
System.out.println(e.getMessage().equals("Speed cannot be greater than speed limit!"));
}
try {
// exception
Car c2 = new Car(70, -10);
} catch (BadSpeedSetting e) {
System.out.println(e.getMessage().equals("Speed cannot be negative!"));
}
// test case for accelerate, canFly and getSpeed methods
try {
Car c3 = new Car(100, 80);
// test the canFly method
System.out.println(c3.canFly() == false);
c3.accelerate(10);
System.out.println(c3.getSpeed() == 90);
// test the accelerate with positive amount
c3.accelerate(-20);
System.out.println(c3.getSpeed() == 70);
// test the accelerate with negative amount
c3.accelerate(35);
// exception
} catch (BadSpeedSetting e) {
System.out.println("BUG! THIS MUST NEVER HAPPEN!");
} catch (ExceedSpeedLimit e) {
System.out
.println(e.getMessage().equals("Current speed is 70. Accelerate 35 will exceed the speed limit!"));
} catch (NotEnoughSpeed e) {
System.out.println("BUG! THIS MUST NEVER HAPPEN!");
}
try {
Car c4 = new Car(100, 80);
// exception
c4.accelerate(-90);
} catch (BadSpeedSetting e) {
System.out.println("BUG! THIS MUST NEVER HAPPEN!");
} catch (ExceedSpeedLimit e) {
System.out.println("BUG! THIS MUST NEVER HAPPEN!");
} catch (NotEnoughSpeed e) {
System.out.println(e.getMessage().equals("Current speed is " + 80 + ", not enough speed to decelerate!"));
}
}
public static void testAircraft() {
// test case for constructors
try {
// Exception
Aircraft a1 = new Aircraft(70, 80, 1000);
} catch (BadSpeedSetting e) {
System.out.println(e.getMessage().equals("Speed cannot be greater than speed limit!"));
} catch (BadAltitudeSetting e) {
System.out.println("BUG! THIS MUST NEVER HAPPEN!");
}
try {
// exception
Aircraft a2 = new Aircraft(70, -10, 1000);
} catch (BadSpeedSetting e) {
System.out.println(e.getMessage().equals("Speed cannot be negative!"));
} catch (BadAltitudeSetting e) {
System.out.println("BUG! THIS MUST NEVER HAPPEN!");
}
try {
// exception
Aircraft a3 = new Aircraft(700, 200, -10);
} catch (BadSpeedSetting e) {
System.out.println("BUG! THIS MUST NEVER HAPPEN!");
} catch (BadAltitudeSetting e) {
System.out.println(e.getMessage().equals("Altitude cannot be negative!"));
}
// Test case for accelerate, canFly, getSpeed and getAltitude methods
try {
Aircraft a4 = new Aircraft(700, 200, 100);
// test the getAltitude method
System.out.println(a4.getAltitude() == 100);
// test the canFly method
System.out.println(a4.canFly() == true);
a4.accelerate(100);
System.out.println(a4.getSpeed() == 300);
// test the accelerate with positive amount
a4.accelerate(-200);
System.out.println(a4.getSpeed() == 100);
// test the accelerate with negative amount
// exception
a4.accelerate(650);
} catch (BadSpeedSetting e) {
System.out.println("BUG! THIS MUST NEVER HAPPEN!");
} catch (BadAltitudeSetting e) {
System.out.println("BUG! THIS MUST NEVER HAPPEN!");
} catch (ExceedSpeedLimit e) {
System.out.println(
e.getMessage().equals("Current speed is 100. Accelerate 650 will exceed the speed limit!"));
} catch (NotEnoughSpeed e) {
System.out.println("BUG! THIS MUST NEVER HAPPEN!");
}
try {
Aircraft a5 = new Aircraft(700, 200, 100);
// exception
a5.accelerate(-300);
} catch (BadSpeedSetting e) {
System.out.println("BUG! THIS MUST NEVER HAPPEN!");
} catch (BadAltitudeSetting e) {
System.out.println("BUG! THIS MUST NEVER HAPPEN!");
} catch (ExceedSpeedLimit e) {
System.out.println("BUG! THIS MUST NEVER HAPPEN!");
} catch (NotEnoughSpeed e) {
System.out.println(e.getMessage().equals("Current speed is " + 200 + ", not enough speed to decelerate!"));
}
}
public static void main(String[] args) {
Vehicle.testVehicle();
Car.testCar();
Aircraft.testAircraft();
}
}