Mockito Exectues“何时到达”从以前的测试

Question

当我分开运行这些测试时，它们工作正常，但是当我执行“在课堂中运行所有测试”时，test shopsaveproduct会失败。我得到了以前的测试中指定的异常（“ dataintegrityviolationException”）。它看起来像Mockito.When（productrepositorymock.save（any（任何（）））。theReturn（product）;不覆盖：

Mockito.when(productRepositoryMock.save(any())).thenThrow(new DataIntegrityViolationException("...SYMBOL_UQ..."));

@ExtendWith(MockitoExtension.class)
@TestInstance(TestInstance.Lifecycle.PER_CLASS)
class ProductServiceImplTest {

    private ProductService productService;
    private ProductRepository productRepositoryMock;

    @BeforeAll
    void setup() {
        productRepositoryMock = Mockito.mock(ProductRepository.class);
        productService = new ProductServiceImpl(productRepositoryMock);
    }
    
    @Test
    void shouldThrowProductExceptionBecauseOfDuplicateSymbol() {
        // given
        Product product = new Product();
        Mockito.when(productRepositoryMock.save(any()))
                .thenThrow(new DataIntegrityViolationException("...SYMBOL_UQ..."));
        // when && then
        ProductException exception = Assertions.assertThrows(ProductException.class, () ->
                productService.saveProduct(product), "Expected to throw ProductException");
        assertEquals(ProductExceptionMessage.SYMBOL_MUST_BE_UNIQUE, exception.getMessage());
    }
    
    @Test
    void shouldSaveProduct() {
        // given
        Product product = getProduct();
        Mockito.when(productRepositoryMock.save(any())).thenReturn(product);
        // when
        ProductTO resultProduct = productService.saveProduct(product);
        // then
        assertEquals(product.getName(), resultProduct.getName());
    }
}

当我使用@testinstance（testinstance.lifecycle.per_method）时代码>和@beforeeach，它有效，但我不明白为什么它不适用于上面介绍的配置。有人可以向我解释吗？

Answer 1

因为这线

 @TestInstance(TestInstance.Lifecycle.PER_CLASS)

使JUNIT创建一个测试类的实例，并在测试之间重复使用。