测试期望异常，异常被抛出（它显示在输出中），但测试失败 [英] Test expected an Exception, Exception was thrown (it shows in the output) but test failed anyway
问题描述
代码构造函数：
public Voertuig（String Merk，Datum datumEersteIngebruikname，int Aankoopprijs，int Zitplaatsen，Mens bestuurder，Mens ... ingezetenen）{
this.nummerplaat = div.getNummerplaat（）;
this.Zitplaatsen = Zitplaatsen;
try {
this.Merk = Merk;
this.datumEersteIngebruikname = datumEersteIngebruikname;
this.Aankoopprijs = Aankoopprijs;
if（！Arrays.asList（bestuurder.getRijbewijs（））。包含（Rijbewijs.B）||！Arrays.asList（bestuurder.getRijbewijs（））。contains（Rijbewijs.BE））{
抛出新的MensException（Geen correct rijbewijs）;
} else {
this.bestuurder = bestuurder;
Ingezetenen.add（bestuurder）;
}
男士[] a = ingezetenen;
if（a.length> Zitplaatsen - 1）{
throw new MensException（te veel ingezetenen）;
} else {
for（int i = 0; i
Ingezetenen.add（a [i]）;
}
}
} catch（MensException e）{
System.out.println（e.getMessage（））;
}
}
代码测试：
@Test（expected = be.vdab.util.mens.MensException.class）
public void test_constructor_zonder_Rijbewijs（）{
// VOERTUIG B，BE // bestuurder：---
Voertuig voertuig = new TestVoertuig（auto，datum，18300，AANTAL_INZITTENDEN，INGEZETENE_A）;
}
当我运行这个集中的测试方法时，这是结果。 >
-------------标准输出---------------
准确的rijbewijs
Testcase：Testcase：test_constructor_zonder_Rijbewijs （be.vdab.voertuigen.VoertuigTest）：FAILED
预期的异常：be.vdab.util.mens.MensException
junit.framework.AssertionFailedError：预期的异常：be.vdab.util.mens.MensException
所以根据输出，异常被捕获并显示，但测试失败。有人知道为什么感谢提前。
编辑：我修复它不包括一个try-catch块，但只是抛出异常导致不得不在每个测试中添加抛出MensException它正在创建一个对象的方法。我通过调整我的自定义MensException来修复这个，而不是扩展异常我已经扩展了RuntimeException，所以我不必在每个测试方法中添加'throws MensException'。
在你的方法中，你正在捕获异常并记录消息（这是一个糟糕的做法，你应该记录stacktrace），而在你的测试中你说出执行测试必须抛出 be.vdab.util.mens.MensException 而不被捕获。
只是在被测试的方法/构造函数中抛出它或者根本就没有。
选项1：
$ pre>
public Voertuig（/ * ...你的参数在这里... * /）{
this.nummerplaat = div.getNummerplaat（）;
this.Zitplaatsen = Zitplaatsen;
尝试{
// ...
// try ...
// ...
} catch（MensException e）{
//System.out.println（e.getMessage（））;
//使用记录器，而不是System.out
//如果您还想使用System.out
//那么至少使用下面显示的代码
// e.printStackTrace（System.out的）;
//上面的行被评论了，因为没有必要记录
//并重新抛出异常
//异常将被最高级执行
//处理应该记录或使用另一个策略
throw e;
}
}
选项2：
public Voertuig（/ * ...你的参数在这里... * /）{
this.nummerplaat = div.getNummerplaat（）;
this.Zitplaatsen = Zitplaatsen;
//删除try
//尝试{
// ...
//尝试...中的代码
// ...
//删除catch
//} catch（MensException e）{
// System.out.println（e.getMessage（））;
//}
}
IMO我会使用选项2而不是选项1。
Hi so there's a test for a constructor for a vehicle. The test initializes a vehicle with a driver without a driving license and it should throw an Exception. code constructor:
public Voertuig(String Merk, Datum datumEersteIngebruikname, int Aankoopprijs, int Zitplaatsen, Mens bestuurder, Mens ... ingezetenen) {
this.nummerplaat = div.getNummerplaat();
this.Zitplaatsen = Zitplaatsen;
try {
this.Merk = Merk;
this.datumEersteIngebruikname = datumEersteIngebruikname;
this.Aankoopprijs = Aankoopprijs;
if (!Arrays.asList(bestuurder.getRijbewijs()).contains(Rijbewijs.B) || !Arrays.asList(bestuurder.getRijbewijs()).contains(Rijbewijs.BE)) {
throw new MensException("Geen correct rijbewijs");
} else {
this.bestuurder = bestuurder;
Ingezetenen.add(bestuurder);
}
Mens[] a = ingezetenen;
if (a.length > Zitplaatsen - 1) {
throw new MensException("te veel ingezetenen");
} else {
for (int i = 0; i < a.length; i++) {
ingezetenenExclBestuurder.add(a[i]);
Ingezetenen.add(a[i]);
}
}
} catch (MensException e) {
System.out.println(e.getMessage());
}
}
code test:
@Test(expected = be.vdab.util.mens.MensException.class)
public void test_constructor_zonder_Rijbewijs() {
//VOERTUIG B,BE//bestuurder:---
Voertuig voertuig = new TestVoertuig("auto", datum, 18300, AANTAL_INZITTENDEN, INGEZETENE_A);
}
and when i run this focused test method this is the outcome.
------------- Standard Output ---------------
Geen correct rijbewijs
Testcase: Testcase: test_constructor_zonder_Rijbewijs(be.vdab.voertuigen.VoertuigTest): FAILED
Expected exception: be.vdab.util.mens.MensException
junit.framework.AssertionFailedError: Expected exception: be.vdab.util.mens.MensException
So according to the Output the Exception is caught and displayed but yet the test failed. Anybody knows why? Thanks in advance.
EDIT: I fixed it by not including a try-catch block but just throwing the exception resulting in having to add 'throws MensException' in every test-method where it was creating an object. I fixed this by adjusting my custom MensException, instead of extending Exception i had it extend RuntimeException so i didn't have to add 'throws MensException' in every test-method.
In your method, you're capturing the exception and logging the message (which is a bad practice, you should log the stacktrace) and in your test you state that the execution of the test must throw a be.vdab.util.mens.MensException without being catched.
Just re throw it or don't catch it at all in the method/constructor being tested.
Option 1:
public Voertuig(/* ...your arguments here... */) {
this.nummerplaat = div.getNummerplaat();
this.Zitplaatsen = Zitplaatsen;
try {
//...
//code in the try...
//...
} catch (MensException e) {
//System.out.println(e.getMessage());
//use a logger, not System.out
//in case you still want to use System.out
//then at least use the code shown below
//e.printStackTrace(System.out);
//line above commented since there's no need to log
//and rethrow the exception
//the exception will be handled by the highest level execution
//and there it should be logged or use another strategy
throw e;
}
}
Option 2:
public Voertuig(/* ...your arguments here... */) {
this.nummerplaat = div.getNummerplaat();
this.Zitplaatsen = Zitplaatsen;
//remove the try
// try {
//...
//code in the try...
//...
//remove the catch
// } catch (MensException e) {
// System.out.println(e.getMessage());
// }
}
IMO I would use option 2 rather than option 1.
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