CODEWITHSUNDEEP
junit5
ortiv
ortiv

Reputation: 171

What is the use of @ValueSource(classes= .....)

In the User Guide for JUnit5 it is mentioned that one of the types that can be used for @ValueSource is java.lang.Class.

What is the use case for this feature? How can I use it?

@ParameterizedTest
@ValueSource(classes = {/*What goes here?*/})

void test(/*What goes here?*/) {

}

Upvotes: 5

Views: 7110

Answers (3)

Thiago Cavalcanti
Thiago Cavalcanti

Reputation: 523

You can use like this:

@ParameterizedTest
@ValueSource(classes = {NoResultException.class, EmptyResultDataAccessException.class})
  public void testOrderNotFound(Class<? extends Exception> clazz) throws Exception {
    when(orderDao.getOrder(ORDER_ID)).thenThrow(clazz);
    assertThrows(OrderNotFoundException.class,
        () -> provisionService.addNumbers(ORDER_ID, USER));
}

Upvotes: 1

ultrakain
ultrakain

Reputation: 251

Example:

@ValueSource(classes = {NoResultException.class, EmptyResultDataAccessException.class})

Upvotes: 0

user11595728
user11595728

Reputation:

There is nothing special about class literals. @ValueSource allows us to specify literal values of different types, and Java supports literal values to refer to references to the instances of class Class<?>. So, these would end up being the input to whatever parameterized unit test we are writing. For example:

@ParameterizedTest
@ValueSource(classes = { String.class, Integer.class })
void testWithValueSource(Class<?> argument) {
    assertEquals( "java.lang", argument.getPackage().getName());
}

Upvotes: 2

Related Questions