I'm using this package and I have a following connectivity in a bloc
Connectivity _connectivity = Connectivity();
StreamSubscription _connectivityStreamSubscription;
ConnectivityBloc() {
_connectivityStreamSubscription = _connectivity.onConnectivityChanged.listen((connectivityResult) {
if (connectivityResult == ConnectivityResult.wifi) {
add(ConnectivityEventConnectEvent());
} else {
add(ConnectivityEventDisconnectEvent());
}
});
}
I'm trying to test the bloc, however I'm struggling to mock the StreamSubscription in unit tests. So how can we mock StreamSubscription in bloc_test?
I've figured it out I didn't pass the instance of Connectivity to bloc.
ConnectivityBloc(this._connectivity) {
I have mocked the Connectivity with Mockito.
class MockConnectivity extends Mock implements Connectivity {}
and then I could just pass the Stream with ConnectivityResult I wanted
when(mockConnectivity.onConnectivityChanged).thenAnswer(
(_) => Stream<ConnectivityResult>.fromIterable([ConnectivityResult.mobile, ConnectivityResult.wifi]));
Related
Note: I'm a Kotlin beginner
Developing stack
Ktor
Koin
KMongo: MongoDB
I defined my application to be like this
Route -> Service -> Repository
Route is define all HTTP request endpoints.
Service is business logic of application.
Repository is data access layer for query/persist data to MongoDB.
What I did to test a route, if the simple route like.
fun Route.healthCheck() {
get("/health") {
call.respond(HealthCheckResponse(message = "OK"))
}
}
#Test
fun testHealth() = testApplication {
application {
configureRouting()
}
client.get("/health").apply {
expect {
that(status).isEqualTo(HttpStatusCode.OK)
that(contentType()?.contentType).isNotNull().and {
contains(ContentType.Application.Json.contentType)
}
that(Json.decodeFromString(HealthCheckResponse.serializer(), bodyAsText()).message)
.isEqualTo("OK")
}
}
}
Test above will run good.
But when the case of the route that has DI, injecting CoroutineDatabase object into Repository then that repository inject it to Service and the service inject into Route.
In unit test code, I defined like below.
// Route define
fun Application.configureRouting() {
routing {
user()
}
}
fun Route.user() {
val userService: UserService by inject()
...
}
class UserServiceImpl(
private val userRepository: UserRepository // <- Repository is injected with MongoDB `CoroutineDatabase` object.
) : AccountService {
...
}
===============
// Unit Test
class UserEndpointTest: KoinTest {
#get:Rule
val koinTestRule = KoinTestRule.create {
modules(module{ single { accountService } })
}
#Test
fun testUserEndpoint() = testApplication {
application {
configureRouting() // -> collecting all extended function of `Route`
}
val client = createClient {
install(ContentNegotiation) {
json()
}
}
val testerEmail = "i_am_testing#the-email.dev"
val requestJson = """
{
"email": "$testerEmail",
"password": "aBCdEf9"
}
""".trimIndent()
val testBody = jsonMapper.decodeFromString(CreateAccountRequest.serializer(), requestJson)
coEvery { mockAccountService.submitUser(any()) } returns User(id = newId(), email = testerEmail, password = "")
client.post("$accountEndpoint/user") {
contentType(ContentType.Application.Json)
setBody(testBody)
}.apply {
expect {
that(status).isEqualTo(HttpStatusCode.Created)
that(contentType()?.contentType).isNotNull().and {
contains(ContentType.Application.Json.contentType)
}
that((body() as AccountResponse).id).isNotBlank()
that((body() as AccountResponse).email).isNotBlank().and {
isEqualTo(testerEmail)
}
}
}
}}
I expected I did mocking service and it should be inject into Route then it won't chaining call to repository and CoroutineDatabase object.
But when I run it keep connecting to database, I noticed with log below.
2022-09-07 02:51:30.093 [cluster-ClusterId{value='631788a0b273ac122eaa8350', description='null'}-localhost:27017] DEBUG org.mongodb.driver.cluster - Updating cluster description to {type=UNKNOWN, servers=[{address=localhost:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketOpenException: Exception opening socket}, caused by {java.net.ConnectException: Connection refused}}]
And I tried to find out a tutorial to find how to write Unit Test with scenario like these, but I found most of answers on searched results are before Ktor version up. (Noticed from their codes still using withTestApplication {} which is deprecated already in version 2.1.0
Who can explain the step of Koin DI work and how to interrupt it with mock.
Thanks.
I have a rest controller using spring webflux and reactor, I am writing unit test for the controller. Please find below the code snippets and help me to write the unit test method to test the .doOnError() block.
I have tried to throw an exception by using Mockito
doThrow(CriticalException.class)
.when(myService).myMethod(object);
This is my unit test:
StepVerifier.create(
Mono.just(
webTestClient.post()
.uri("/endpoint")
.accept(MediaType.APPLICATION_JSON)
.body(BodyInserters.fromObject(requestJson)) //Set the body of the request to the given synchronous Object
//Returns:a Mono with the response
//Act
.exchange() //Perform the exchange
//Assert
.expectStatus().isOk()
.expectBody(Agreement.class)
.returnResult()
.getResponseBody()))
.expectNextMatches(agreementResponse -> {
assertNotNull(agreementResponse.getAgreementParticipant());
return true;
})
.expectComplete()
.verify();
This is my controller:
return Mono.fromCallable(() -> {
myService.myMethod(object);
return object;
}).log().subscribeOn(Schedulers.elastic())
.map(p -> ResponseEntity.ok(p))
.defaultIfEmpty(ResponseEntity.notFound().build())
.doOnError(e -> {
LOGGER.error(LOG_FORMAT, e.getMessage(), e.getStackTrace());
});
Mockito is not returning exception while myService.myMethod(object) is been called.
Please suggest proper way to write test for .defaultIfEmpty() and .doOnError() blocks.
Instead of throwing CriticalException.class while mocking your myService.myMethod(object) return an exception wrapped in a Mono
For eg :
Mockito.doReturn(Mono.error(Exception::new)).when(service).callableMethod();
Find the sample code snippet below
import org.junit.Test;
import org.mockito.Mock;
import org.mockito.Mockito;
import reactor.core.publisher.Mono;
import reactor.test.StepVerifier;
class Service {
public Mono<String> callableMethod() {
return Mono.just("1");
}
}
class Controller {
private Service service;
public Controller(Service service) {
this.service = service;
}
public Mono<String> endpoint() {
return service.callableMethod().doOnError(throwable -> {
System.out.println("throwable = " + throwable);
});
}
}
public class TestClass {
#Mock
private Service service = Mockito.mock(Service.class);
#Test
public void controllerTest() {
Mockito.doReturn(Mono.error(Exception::new)).when(service).callableMethod();
StepVerifier.create(new Controller(service).endpoint()).verifyError();
}
}
I am developing an ASP.NET web API application. I am unit testing to every component in my application. I am using Moq Unit Test framework to mock the data. Now I am trying to mock the Configuration.Formatters.JsonFormatter in my Unit test because my action under unit test is using it as follows:
public HttpResponseMessage Register(model)
{
return new HttpResponseMessage
{
StatusCode = HttpStatusCode.BadRequest,
Content = new ObjectContent<List<string>>(errors, Configuration.Formatters.JsonFormatter)
};
}
I am trying to mock the Configuration.Formatters.JsonFormatter in the Unit Test as follow.
[TestMethod]
public void Register_ReturnErrorsWithBadRequest_IfValidationFails()
{
PostUserRegistration model = new PostUserRegistration {
Name = "Wai Yan Hein",
Email = "waiyanhein#gmail.com",
Password = ""
};
Mock<JsonMediaTypeFormatter> formatterMock = new Mock<JsonMediaTypeFormatter>();
Mock<MediaTypeFormatterCollection> formatterCollection = new Mock<MediaTypeFormatterCollection>();
formatterCollection.Setup(x => x.JsonFormatter).Returns(formatterMock.Object);
Mock<HttpConfiguration> httpConfigMock = new Mock<HttpConfiguration>();
httpConfigMock.Setup(x => x.Formatters).Returns(formatterCollection.Object);
Mock<IAccountRepo> accRepoMock = new Mock<IAccountRepo>();
AccountsController controller = new AccountsController(accRepoMock.Object);
controller.Configuration = httpConfigMock.Object;
controller.ModelState.AddModelError("", "Faking some model error");
HttpResponseMessage response = controller.Register(model);
Assert.AreEqual(response.StatusCode, System.Net.HttpStatusCode.BadRequest);
}
When I run my unit tests, it is giving me this error.
System.NotSupportedException: Invalid setup on a non-virtual
(overridable in VB) member: x => x.JsonFormatter
So, how can I fix that error and how can I mock Configuration.Formatters.JsonFormatter?
You should not have to test that the framework is doing what it was designed to do. Instead, similar to what was suggested before in comments, I suggest using the built in methods of the ApiController and also refactoring the action to the syntax suggested from documentation for that version of Asp.Net Web API
public IHttpActionResult Register(PostUserRegistration model) {
if (!ModelState.IsValid)
return BadRequest(ModelState); //<-- will extract errors from model state
//...code removed for brevity
return Ok();
}
A simple example of a unit test for the above method could look something like this...
[TestMethod]
public void Register_ReturnErrorsWithBadRequest_IfValidationFails() {
//Arrange
PostUserRegistration model = new PostUserRegistration {
Name = "Wai Yan Hein",
Email = "waiyanhein#gmail.com",
Password = ""
};
var accRepoMock = new Mock<IAccountRepo>();
var controller = new AccountsController(accRepoMock.Object);
controller.ModelState.AddModelError("", "Faking some model error");
//Act
var response = controller.Register(model) as InvalidModelStateResult; //<-- Note the cast here
//Assert
Assert.IsNotNull(response);
}
If the injected dependency is not going to be referenced/invoked in the method under test you could also forego the mock and inject null. That however is dependent on code not provided in the original question.
I'm using Grails 2.3.8 and trying to create a unit test for a filter that uses a service.
The filter:
class LicenseFilters {
def licenseService
def filters = {
all(controller:'*', action:'*') {
before = {
if(!licenseService.checkLicense()){
redirect(controller:"licenseExpired")
return false
}
}
}
}
}
The spec, first attempt:
#TestFor(ExecutionTraceController)
#Mock(LicenseFilters)
class LicenseFiltersSpec extends Specification{
void "Test filter redirects when license is wrong"() {
given:
LicenseFilters bean=applicationContext.getBean("com.nortia.sgmentia.license.LicenseFilters")
bean.licenseService=this.buildLicenseServiceStub(false)
when:
withFilters(action:"list") {
controller.list()
}
then:
response.redirectedUrl == '/licenseExpired'
}
private LicenseService buildLicenseServiceStub(boolean ok){
LicenseService result=Stub(LicenseService)
result.checkLicense() >> ok
return result
}
}
But it turns out (by debugging) that the bean that I grab from the context it is NOT the same one that receives the request thus I still get a NPE.
In a second attempt I try using defineBeans:
void "Test filter redirects when license is wrong"() {
given:
defineBeans {
licenseService(MethodInvokingFactoryBean){
targetObject = this
targetMethod= "buildLicenseServiceStub"
arguments=[false]
}
}
when:
withFilters(action:"list") {
controller.list()
}
then:
response.redirectedUrl == '/licenseExpired'
}
But the mocked bean is neither bean instanciated nor inyected.
Should I try to inyect the service manually into the filter??
There was this issue https://jira.grails.org/browse/GRAILS-8976 but it is closed.
I came across a similar situation and was able to fix it by adding the service to the #Mock annotation, i.e. #Mock([LicenseFilters, LicenseService]).
In your case the spec would look something like the following:
#TestFor(ExecutionTraceController)
#Mock([LicenseFilters, LicenseService])
class LicenseFiltersSpec extends Specification {
void "Test filter redirects when license is wrong"() {
given:
defineBeans {
licenseService(MethodInvokingFactoryBean) {
targetObject = this
targetMethod = "buildLicenseServiceStub"
arguments = [false]
}
}
when:
withFilters(action: "list") {
controller.list()
}
then:
response.redirectedUrl == '/licenseExpired'
}
private LicenseService buildLicenseServiceStub(boolean ok) {
LicenseService result = Stub(LicenseService)
result.checkLicense() >> ok
return result
}
}
Note: that mocking the service in this manner will, by default, inject an instance of the actual LicenseService into your filter. So, if the above defineBeans block is removed the actual implementation of LicenseService.checkLicense() will be called.
I finally found a workaround to make it work going with the second approach (using defineBeans).
The service is not being autowired into the filter so I finally did it manually with a pseudo-singleton:
class LicenseFilters {
def licenseService
def filters = {
all(controller:'*', action:'*') {
before = {
if(!this.licenseService){
this.licenseService=applicationContext.getBean("licenseService")
}
if(!this.licenseService.checkLicense()){
redirect(controller:"licenseExpired")
return false
}
}
}
}
}
Quite ugly but a solution at least.
Hope it helps someone out there.
I'm trying to learn about Unit Testing with the new VS2013 Default MVC w/ Authentication Project. One of the first things I want to test is registering a user. (I know I probably don't need to unit test this since it's already MS tested code but I want to use this to understand the basics). I've also heard that the new Membership code is more 'testable' so I don't need to create my own membership interfaces, etc...
I'm using NSubstitute as a faking framework.
Looking at the Account Controller -> Register() async method
namespace WebApplication1.Controllers
{
[Authorize]
public class AccountController : Controller
{
public AccountController()
: this(new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(new ApplicationDbContext())))
{
}
public AccountController(UserManager<ApplicationUser> userManager)
{
UserManager = userManager;
}
public UserManager<ApplicationUser> UserManager { get; private set; }
...
//
// POST: /Account/Register
[HttpPost]
[AllowAnonymous]
[ValidateAntiForgeryToken]
public async Task<ActionResult> Register(RegisterViewModel model)
{
if (ModelState.IsValid)
{
var user = new ApplicationUser() { UserName = model.UserName };
var result = await UserManager.CreateAsync(user, model.Password);
if (result.Succeeded)
{
await SignInAsync(user, isPersistent: false);
return RedirectToAction("Index", "Home");
}
else
{
AddErrors(result);
}
}
// If we got this far, something failed, redisplay form
return View(model);
}
If I wanted to write a simple test (ex. Register_RegisterValidUser), how would I do this? I know I need to substitute for the UserManager somehow but this did not work for me:
var substitute = Substitute.For<UserManager<ApplicationUser>>();
I also understand that I need to bypass the async Task<> functions using Task.FromResult but I'm not sure how to return a valid objects from the CreateAsync() and the SigninAsync() methods.
Can somebody help with some sample test code? Many thanks!
To mock the user manager with NSubstitute you have to use this:
var userStore = Substitute.For<IUserStore<ApplicationUser>>();
var userManager = Substitute.For<UserManager<ApplicationUser>>(userStore);
Now you can fake the methods result too. For example:
userManager.FindByNameAsync(Arg.Any<string>()).Returns(Task.FromResult(new ApplicationUser()));
Hope this help you.
Test Guidance
You can Unit Test couple of behaviours, but I will just show you the direction for a single Unit test that just verify whether receive the correct RedirectToAction value. For example,
return RedirectToAction("Index", "Home");
Improving the Testability
In your question you mentioned
I've also heard that the new Membership code is more 'testable' so I
don't need to create my own membership interfaces, etc..
While this is true, I would make a small adjustment so we can make your implementation bit more testable. This way your Unit Test can purely concentrate on the specific behaviour your going test. In other words we can make you SUT (System Under Test) more testable.
await SignInAsync(user, isPersistent: false);
I believe SignInAsync is a private method. There should be some behavior in this method you can probably extract out to a seperate implementation which you can inject in to the SUT. We can call this ISignInManager
public interface ISignInManager {
Task SignInAsync(ApplicationUser user, bool isPersistent);
}
The benefit of this is that now you can inject the behaiovr of an ISignInManager to perform the SignIn tasks and your SUT become more testable. You should see that there will be less mocking/stubbing in your Unit test and make your test easier to write and understand.
Unit Test
You can take the advantage of new async/await usage of the MSTest method. This simplifies complicated and unreliable tests which we used to write.
A Unit Test that verify the correct redirect route controller/action methods, can be written as below.
[TestMethod]
public async Task Register_RegisterValidUser_EnsureRedirectToIndexActionHomeController()
{
// Arrange
var userManagerStub = Substitute.For<IUserManager<ApplicationUser>>();
var tcs = new TaskCompletionSource<IdentityResult>();
tcs.SetResult(new IdentityResult(true));
userManagerStub.CreateAsync(Arg.Any<ApplicationUser>(), Arg.Any<string>()).Returns(tcs.Task);
var signInManagerStub = Substitute.For<ISignInManager>>();
signInManagerStub.Setup(s => s.SignInAsync(It.IsAny<ApplicationUser>(), It.IsAny<bool>())).Returns(Task.FromResult(true));
var sut = new AccountController(userManagerStub) { SignInManager = signInManagerStub.Object };
// Act
var result = await sut.Register(new RegisterViewModel() { Password = "fakePw" }) as RedirectToRouteResult;
// Assert
Assert.AreEqual<string>("Index", result.RouteValues["action"].ToString());
Assert.AreEqual<string>("Home", result.RouteValues["controller"].ToString());
}
The above uses NSubstitute as the isolation framework, but if anyone interested in the Moq version, please see below.
[TestMethod]
public async Task Register_RegisterValidUser_EnsureRedirectToIndexHome()
{
// Arrange
var userManagerStub = new Mock<IUserManager<ApplicationUser>>();
var tcs = new TaskCompletionSource<IdentityResult>();
tcs.SetResult(new IdentityResult(true));
userManagerStub.Setup(s => s.CreateAsync(It.IsAny<ApplicationUser>(), It.IsAny<string>())).Returns(tcs.Task);
var signInManagerStub = new Mock<ISignInManager>();
signInManagerStub.Setup(s => s.SignInAsync(It.IsAny<ApplicationUser>(), It.IsAny<bool>())).Returns(Task.FromResult(true));
var sut = new AccountController(userManagerStub.Object) {SignInManager = signInManagerStub.Object};
// Act
var result = await sut.Register(new RegisterViewModel() { Password = "fakePw" }) as RedirectToRouteResult;
// Assert
Assert.AreEqual<string>("Index", result.RouteValues["action"].ToString());
Assert.AreEqual<string>("Home", result.RouteValues["controller"].ToString());
}