CODEWITHSUNDEEP
javajunit
quarks
quarks

Reputation: 35276

Assertion error even if there is expected error in JUnit

Test in my app is throwing:

java.lang.AssertionError: Expected exception: java.lang.RuntimeException
    at org.junit.internal.runners.statements.ExpectException.evaluate(ExpectException.java:35)

Even if I have this:

@Test(expected=RuntimeException.class)
public void test(){
  // I can see from the console log that a java.lang.RuntimeException was thrown
}

What could be the issue?

Upvotes: 1

Views: 5430

Answers (2)

EJK
EJK

Reputation: 12527

By annotating your test with 

@Test(expected=RuntimeException.class)

you are asserting that when the test is run, a RuntimeExcetption will be thrown and not caught. The fact that you have stated in the comments that "there is a try-catch statement in the code that was called", implies that the exception is caught.

Thus JUnit is right to flag this as a failed test. You are asserting that an exception is thrown, but one is not.

Upvotes: 2

Sotirios Delimanolis
Sotirios Delimanolis

Reputation: 279880

The only way for JUnit to detect that an exception was thrown is for the @Test method to throw it, ie. terminate its execution because of it.

If you're catching the exception and handling, method execution won't stop because of a thrown exception. It will complete normally. You need it to complete abruptly because of the thrown exception. Rethrow it if you need to log it.

Upvotes: 1

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