[Demonstration 1]

[Buggy Method]
@Test
@Transactional
public void addToNotExistingCart() throws Exception {
    // Initialize the database
    final int databaseSizeBeforeUpdate = this.cartRepository.findAll().size();
    // Update the cart
    this.restCartMockMvc.perform(put("/carts/{cartId}/products/{productId}", Integer.MAX_VALUE, Integer.MAX_VALUE).contentType(TestUtil.APPLICATION_JSON_UTF8)).andExpect(status().isBadRequest());
    // Validate the Cart in the database
    final List<Cart> cartList = this.cartRepository.findAll();
    assertThat(cartList).hasSize(databaseSizeBeforeUpdate);
    // Teardown
}

[Buggy Hunk]
.andExpect(status().isBadRequest());

[Patch]
.andExpect(status().isNotFound());

[Demonstration 2]

[Buggy Method]
@Test
public void should_get_results_filtered_by_from_date() throws Exception {
    mvc.perform(post("/api/results").accept(MediaType.APPLICATION_JSON).contentType(MediaType.APPLICATION_JSON).content(asJson(new Filters(null, new Date(1496836800000L), null)))).andExpect(status().isOk()).andExpect(content().contentType(MediaType.APPLICATION_JSON_UTF8)).andExpect(content().json(getResponseJson("get-results-filtered-by-from-date.json")));
}

[Buggy Hunk]
.content(asJson(new Filters(null, new Date(1496836800000L), null))))

[Patch]
.content(asJson(new Filters(null, Date.from(LocalDate.of(2017, 6, 7).atStartOfDay(ZoneId.systemDefault()).toInstant()), null))))

[Demonstration 3]

[Buggy Method]
public static Result service(String ownerName, String projectName, String service, boolean isAdvertise) throws IOException, UnsupportedOperationException, ServletException {
    if (!isSupportedService(service)) {
        return forbidden(String.format("Unsupported service: '%s'", service));
    }
    Project project = Project.findByOwnerAndProjectName(ownerName, projectName);
    if (project == null) {
        return notFound();
    }
    models.User user = UserApp.currentUser();
    if (!isAllowed(project, service)) {
        if (user.isAnonymous()) {
            return BasicAuthAction.unauthorized(response());
        } else {
            // If you want the Git client showing your custom message to
            // the user, the Content-Type should be exact "text/plain"
            // without any parameter. For more details, see the code at
            // https://github.com/git/git/commit/426e70d4a11ce3b4f70636d57c6a0ab16ae08a00#diff-eea0ad565ec5903a11b6023755d491cfR154
            response().setHeader("Content-Type", "text/plain");
            return forbidden(String.format("'%s' has no permission to '%s/%s'.", user.name, ownerName, projectName));
        }
    }
    if (isAdvertise) {
        return ok(RepositoryService.gitAdvertise(project, service, response()));
    } else {
        if (request().body().isMaxSizeExceeded()) {
            return status(REQUEST_ENTITY_TOO_LARGE);
        } else {
            user.visits(project);
            return ok(RepositoryService.gitRpc(project, service, request(), response()));
        }
    }
}

[Buggy Hunk]
user.name, ownerName, projectName));

[Patch]
user.loginId, ownerName, projectName));