[FIXED] JUnit 5 Exception Testing Equivalent of Junit 4

Issue

I have the following JUnit 4 test for exception:

@Test(expected = NotFoundException.class)
public void getRecipeByIdTestNotFound() throws Exception {

    Optional<Recipe> recipeOptional = Optional.empty();

    when(recipeRepository.findById(anyLong())).thenReturn(recipeOptional);

    Recipe recipeReturned = recipeService.findById(1L);

    //should go boom
}

I want help on the most efficient approach to test the same in JUnit 5.

Solution

Usage 1:

try{
    Optional<Recipe> recipeOptional = Optional.empty(); 
    when(recipeRepository.findById(anyLong())).thenReturn(recipeOptional); 
    Recipe recipeReturned = recipeService.findById(1L);
}catch(Exception e){
    AssertThat(e, instanceOf(NotFoundException.class));
}

Usage 2:

Assertions.assertThrow(NotFoundException.class, () -> {
    Optional<Recipe> recipeOptional = Optional.empty();
    when(recipeRepository.findById(anyLong())).thenReturn(recipeOptional);
    Recipe recipeReturned = recipeService.findById(1L);
});

Answered By - Eric Sun
Answer Checked By - Cary Denson (JavaFixing Admin)