JUnit Exception Testing: Difference between revisions
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Line 23: | Line 23: | ||
==assertThrows()== | ==assertThrows()== | ||
<syntaxhighlight lang='java'> | |||
@Test | |||
public void testExceptionAndState() { | |||
List<Object> list = new ArrayList<>(); | |||
IndexOutOfBoundsException thrown = assertThrows( | |||
IndexOutOfBoundsException.class, | |||
() -> list.add(1, new Object())); | |||
// assertions on the thrown exception | |||
assertEquals("Index: 1, Size: 0", thrown.getMessage()); | |||
// assertions on the state of a domain object after the exception has been thrown | |||
assertTrue(list.isEmpty()); | |||
} | |||
</syntaxhighlight> |
Revision as of 23:32, 26 August 2020
External
Internal
Idioms
Try/Catch
try {
...
fail("should have thrown exception");
}
catch(SomeException e) {
assertEquals("some message", e.getMessage());
}
assertThrows()
@Test
public void testExceptionAndState() {
List<Object> list = new ArrayList<>();
IndexOutOfBoundsException thrown = assertThrows(
IndexOutOfBoundsException.class,
() -> list.add(1, new Object()));
// assertions on the thrown exception
assertEquals("Index: 1, Size: 0", thrown.getMessage());
// assertions on the state of a domain object after the exception has been thrown
assertTrue(list.isEmpty());
}