你好，我为我的逻辑编写了一个测试用例，所有这些都运行得很好。但是，我不知道如何测试我的自定义异常。下面是我的代码；
@Component
public class PlaneFactory {
public Plane getPlane(String planeType) {
if (StringUtils.isBlank(planeType)) {
throw new PlaneTypeNotFoundException();
}
if (planeType.equalsIgnoreCase("lightJet")) {
return new LightJet();
} else if (planeType.equalsIgnoreCase("midJet")) {
return new MidJet();
}
else {
throw new InvalidPlaneTypeException();
}
my custom exceptions below;
PlaneTypeNotFoundException class below;
public class PlaneTypeNotFoundException extends RuntimeException {
private static final long serialVersionUID = 4314211343358454345L;
public PlaneTypeNotFoundException() {
super("You have not enter anything to check a plane");
}
}
InvalidPlaneTypeException below;
public class InvalidPlaneTypeException extends RuntimeException {
public InvalidPlaneTypeException() {
super("You need to enter one of following plane types : {LightJet, MidJet}");
}
}
哪些方法适合使用？我的意思是，在这种情况下，我应该使用assertThrows还是只使用预期的注释？
对于PlaneTypeNotFoundException，我已经尝试了一些低于它不起作用的
@Test
public void testPlaneFactory_isEmptyOrNull_ThenReturnException() {
String planeType = "";
LightJet lightJet= (LightJet) planeFactory.getPlane(planeType);
assertThrows(PlaneNotFoundException.class, () -> lightJet.getType().equalsIgnoreCase(planeType), "You have not enter anything to check a plane");
}
如果我正确地遵循您的代码，那么assertThrows()中的可执行lambda应该是您期望生成异常的代码：
public void testPlaneFactory_isEmptyOrNull_ThenReturnException() {
assertThrows(PlaneNotFoundException.class, () -> planeFactory.getPlane(""));
}
如果确实抛出异常，则测试应通过。
第二种情况的测试是：
void testInvalidPlaneType() {
assertThrows(InvalidPlaneTypeException.class, () -> planeFactory.getPlane("doh"));
}