mockito | popular Mocking framework for unit tests written | Unit Testing library

by mockito Java Version: v4.5.0 License: MIT

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kandi X-RAY | mockito Summary

mockito is a Java library typically used in Testing, Unit Testing applications. mockito has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has high support. You can download it from GitHub, Maven.

Available as part of the Tidelift Subscription. The maintainers of org.mockito:mockito-core and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source dependencies you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact dependencies you use. Learn more.

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Quality

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kandi-support Support

mockito has a highly active ecosystem.
It has 12806 star(s) with 2261 fork(s). There are 428 watchers for this library.
There were 2 major release(s) in the last 6 months.
There are 302 open issues and 1026 have been closed. On average issues are closed in 51 days. There are 7 open pull requests and 0 closed requests.
It has a positive sentiment in the developer community.
The latest version of mockito is v4.5.0

mockito Support

Best in #Unit Testing

Average in #Unit Testing

mockito Support

Best in #Unit Testing

Average in #Unit Testing

quality kandi Quality

mockito has 0 bugs and 0 code smells.

mockito Quality

Best in #Unit Testing

Average in #Unit Testing

mockito Quality

Best in #Unit Testing

Average in #Unit Testing

security Security

mockito has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
mockito code analysis shows 0 unresolved vulnerabilities.
There are 0 security hotspots that need review.

mockito Security

Best in #Unit Testing

Average in #Unit Testing

mockito Security

Best in #Unit Testing

Average in #Unit Testing

license License

mockito is licensed under the MIT License. This license is Permissive.
Permissive licenses have the least restrictions, and you can use them in most projects.

mockito License

Best in #Unit Testing

Average in #Unit Testing

mockito License

Best in #Unit Testing

Average in #Unit Testing

build Reuse

mockito releases are available to install and integrate.
Deployable package is available in Maven.
Build file is available. You can build the component from source.
Installation instructions are not available. Examples and code snippets are available.
It has 65330 lines of code, 6163 functions and 1031 files.
It has low code complexity. Code complexity directly impacts maintainability of the code.

mockito Reuse

Best in #Unit Testing

Average in #Unit Testing

mockito Reuse

Best in #Unit Testing

Average in #Unit Testing

Top functions reviewed by kandi - BETA

kandi has reviewed mockito and discovered the below as its top functions. This is intended to give you an instant insight into mockito implemented functionality, and help decide if they suit your requirements.

Matches a method invocation .
Returns the return value for the given type .
Trigger retransformation .
Prints a value as a string .
make sure arguments are valid
Filter the stack trace .
Registers type variables on the given class .
Creates the mock object .
Proxies a new instance of a given field .
Process annotation .

mockito Key Features

Still on Mockito 1.x? See what's new in Mockito 2! Mockito 3 does not introduce any breaking API changes, but now requires Java 8 over Java 6 for Mockito 2. Mockito 4 removes deprecated API.

mockito Examples and Code Snippets

See all related Code Snippets

How to develop Mockito?

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 ./gradlew build

How to release new version?

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git tag -a -m "Release 3.4.5" v3.4.5
git push origin v3.4.5

Skipping a method execution using Mockito

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   @Test
    public void test_method(){
        ActualClass spyActualClass = Mockito.spy(actualClassMock);

        doNothing().when(spyActualClass).validate(Mockito.any(), Mockito.any());
        spyActualClass.method();
    }

actualClassMock.method();

spyActualClass.method();

-----------------------

   @Test
    public void test_method(){
        ActualClass spyActualClass = Mockito.spy(actualClassMock);

        doNothing().when(spyActualClass).validate(Mockito.any(), Mockito.any());
        spyActualClass.method();
    }

actualClassMock.method();

spyActualClass.method();

-----------------------

   @Test
    public void test_method(){
        ActualClass spyActualClass = Mockito.spy(actualClassMock);

        doNothing().when(spyActualClass).validate(Mockito.any(), Mockito.any());
        spyActualClass.method();
    }

actualClassMock.method();

spyActualClass.method();

Mockito can not mock Random in Java 17

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   interface RandomSource {
        /**
         * Return a random number that matches the criteria you need
         */
        int nextNumber();
    }

    @Bean
    class DefaultRandomSource implements RandomSource {
        private final Random r = new Random();
        public int nextNumber() {
            return r.nextInt(2);
        }
    }
    
    @Bean
    class ClassToTest {
        private final RandomSource randomSource;

        @Autowired
        public ClassToTest(RandomSource randomSource) {
            this.randomSource = randomSource;
        }

        public String doSomething() {
            return randomSource.nextNumber() == 0 ? "Foo" : "Bar";
        }
    }
    
    @Test
    void testDoSomething() {
        RandomSource r = mock(RandomSource.class);
        when(r.nextNumber()).thenReturn(0);
        ClassToTest classToTest = new ClassToTest(r);
        assertEquals("Foo", classToTest.doSomething());
    }

-----------------------

mock(SecureRandom.class, withSettings().withoutAnnotations())

Java generics from Kotlin when verifying using Mockito?

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verify(exactly = 0) { yourClass.doThings(any()) };

-----------------------

@Suppress("TYPE_MISMATCH_WARNING", "UPPER_BOUND_VIOLATED_WARNING")
verify(myInterfaceInstance, never()).doThings<Any, MyObject<*, *>?>(any<MyObject<*, *>>())

How to write Junit test for methods with local variables

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private static final ExecutorService l = Executors.newFixedThreadPool(1);

private static String getUserInputWithTimeout(int timeout, Callable<String> k) {
    LocalDateTime start = LocalDateTime.now();
    Future<String> g = l.submit(k);
    while (ChronoUnit.SECONDS.between(start, LocalDateTime.now()) < timeout) {
        if (g.isDone()) {
            try {
                String choice = g.get();
                return choice;
            } catch (InterruptedException | ExecutionException | IllegalArgumentException e) {
                logger.error("ERROR", e);
                g = l.submit(k);
            }
        }
    }
    logger.info("Timeout...");
    g.cancel(true);
    return null;
}

@Test
public void testgetUserInputWithUserInput() throws Exception {
    
    String ENTER = " ";
    System.setIn(new ByteArrayInputStream(ENTER.getBytes()));

    Callable<String> callable = () -> new Scanner(System.in).nextLine();

    assertEquals(ENTER, getUserInputWithTimeout(5, callable));
}

-----------------------

private static final ExecutorService l = Executors.newFixedThreadPool(1);

private static String getUserInputWithTimeout(int timeout, Callable<String> k) {
    LocalDateTime start = LocalDateTime.now();
    Future<String> g = l.submit(k);
    while (ChronoUnit.SECONDS.between(start, LocalDateTime.now()) < timeout) {
        if (g.isDone()) {
            try {
                String choice = g.get();
                return choice;
            } catch (InterruptedException | ExecutionException | IllegalArgumentException e) {
                logger.error("ERROR", e);
                g = l.submit(k);
            }
        }
    }
    logger.info("Timeout...");
    g.cancel(true);
    return null;
}

@Test
public void testgetUserInputWithUserInput() throws Exception {
    
    String ENTER = " ";
    System.setIn(new ByteArrayInputStream(ENTER.getBytes()));

    Callable<String> callable = () -> new Scanner(System.in).nextLine();

    assertEquals(ENTER, getUserInputWithTimeout(5, callable));
}

How to mock JWT token to use it with Mockito and Spring Boot

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@AutoConfigureMockMvc(addFilters = false)
class CategoryCommandControllerTest {

@Override
protected void configure(HttpSecurity http) throws Exception {

    http.csrf().disable();
}

 if (authorizationHeader != null && authorizationHeader.startsWith("Bearer ")) {
        jwt = authorizationHeader.substring(7);
        username = jwtUtil.extractUsername(jwt);
    } else {
        response.setStatus(HttpStatus.FORBIDDEN.value());
        return;
    }

  if (username != null) {

        UserDetails userDetails = this.userDetailsService.loadUserByUsername(username);

        if (jwtUtil.validateToken(jwt, userDetails)) {

            UsernamePasswordAuthenticationToken usernamePasswordAuthenticationToken = new UsernamePasswordAuthenticationToken(
                    userDetails, null, userDetails.getAuthorities());
            usernamePasswordAuthenticationToken
                    .setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
            SecurityContextHolder.getContext().setAuthentication(usernamePasswordAuthenticationToken);
        }

        // chain.doFilter(request, response);

    }

    chain.doFilter(request, response);

}

-----------------------

@AutoConfigureMockMvc(addFilters = false)
class CategoryCommandControllerTest {

@Override
protected void configure(HttpSecurity http) throws Exception {

    http.csrf().disable();
}

 if (authorizationHeader != null && authorizationHeader.startsWith("Bearer ")) {
        jwt = authorizationHeader.substring(7);
        username = jwtUtil.extractUsername(jwt);
    } else {
        response.setStatus(HttpStatus.FORBIDDEN.value());
        return;
    }

  if (username != null) {

        UserDetails userDetails = this.userDetailsService.loadUserByUsername(username);

        if (jwtUtil.validateToken(jwt, userDetails)) {

            UsernamePasswordAuthenticationToken usernamePasswordAuthenticationToken = new UsernamePasswordAuthenticationToken(
                    userDetails, null, userDetails.getAuthorities());
            usernamePasswordAuthenticationToken
                    .setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
            SecurityContextHolder.getContext().setAuthentication(usernamePasswordAuthenticationToken);
        }

        // chain.doFilter(request, response);

    }

    chain.doFilter(request, response);

}

-----------------------

@AutoConfigureMockMvc(addFilters = false)
class CategoryCommandControllerTest {

@Override
protected void configure(HttpSecurity http) throws Exception {

    http.csrf().disable();
}

 if (authorizationHeader != null && authorizationHeader.startsWith("Bearer ")) {
        jwt = authorizationHeader.substring(7);
        username = jwtUtil.extractUsername(jwt);
    } else {
        response.setStatus(HttpStatus.FORBIDDEN.value());
        return;
    }

  if (username != null) {

        UserDetails userDetails = this.userDetailsService.loadUserByUsername(username);

        if (jwtUtil.validateToken(jwt, userDetails)) {

            UsernamePasswordAuthenticationToken usernamePasswordAuthenticationToken = new UsernamePasswordAuthenticationToken(
                    userDetails, null, userDetails.getAuthorities());
            usernamePasswordAuthenticationToken
                    .setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
            SecurityContextHolder.getContext().setAuthentication(usernamePasswordAuthenticationToken);
        }

        // chain.doFilter(request, response);

    }

    chain.doFilter(request, response);

}

-----------------------

@AutoConfigureMockMvc(addFilters = false)
class CategoryCommandControllerTest {

@Override
protected void configure(HttpSecurity http) throws Exception {

    http.csrf().disable();
}

 if (authorizationHeader != null && authorizationHeader.startsWith("Bearer ")) {
        jwt = authorizationHeader.substring(7);
        username = jwtUtil.extractUsername(jwt);
    } else {
        response.setStatus(HttpStatus.FORBIDDEN.value());
        return;
    }

  if (username != null) {

        UserDetails userDetails = this.userDetailsService.loadUserByUsername(username);

        if (jwtUtil.validateToken(jwt, userDetails)) {

            UsernamePasswordAuthenticationToken usernamePasswordAuthenticationToken = new UsernamePasswordAuthenticationToken(
                    userDetails, null, userDetails.getAuthorities());
            usernamePasswordAuthenticationToken
                    .setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
            SecurityContextHolder.getContext().setAuthentication(usernamePasswordAuthenticationToken);
        }

        // chain.doFilter(request, response);

    }

    chain.doFilter(request, response);

}

-----------------------

@MockBean
private JwtUtil jwtUtil;

    if (authorizationHeader != null && authorizationHeader.startsWith("Bearer ")) {
        jwt = authorizationHeader.substring(7);
        username = jwtUtil.extractUsername(jwt);
    }

@WebMvcTest(value = CategoryCommandController.class, includeFilters = {
        // to include JwtUtil in spring context
        @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, classes = JwtUtil.class)})
class CategoryCommandControllerTest {

    Logger logger = LoggerFactory.getLogger(CategoryCommandController.class);

    @MockBean
    private CategoryCommandService categoryCommandService;

    @Autowired
    private MockMvc mockMvc;

    @MockBean
    private MyUserDetailsService myUserDetailsService;

    @MockBean
    private CategoryRepository categoryRepository;

    @Autowired
    private JwtUtil jwtUtil;

    @Autowired
    private JwtRequestFilter filter;

    //    @WithMockUser
    @Test
    void testCreateCategory() throws Exception {

        CategoryCreateDto categoryCreateDto = new CategoryCreateDto("category");
        CategoryCreateDto categoryCreateResponseDto = new CategoryCreateDto(UUID.fromString("2da4002a-31c5-4cc7-9b92-cbf0db998c41"), "category");

        String jsonCreate = asJsonString(categoryCreateDto);
        String jsonResponse = asJsonString(categoryCreateResponseDto);
        UserDetails dummy = new User("foo@email.com", "foo", new ArrayList<>());
        String jwtToken = jwtUtil.generateToken(dummy);
        RequestBuilder request = MockMvcRequestBuilders
                .post("/api/adverts/category")
                .content(jsonCreate)
                .header("Authorization", "Bearer " + jwtToken)
                .contentType(MediaType.APPLICATION_JSON_VALUE)
                .accept(MediaType.APPLICATION_JSON);
// Below line is not used
//        mockMvc.perform(request).andReturn();

        //             Should be createCategory(eq(categoryCreateDto))?
        when(categoryCommandService.createCategory(categoryCreateDto)).thenReturn(
                categoryCreateResponseDto);
        // Mock Service method used in JwtRequestFilter
        when(myUserDetailsService.loadUserByUsername(eq("foo@email.com"))).thenReturn(dummy);
        MvcResult mvcResult = mockMvc.perform(request)
                .andExpect(status().is2xxSuccessful())
//                .andExpect(content().json(jsonResponse, true))
                .andExpect(jsonPath("$.id").value("2da4002a-31c5-4cc7-9b92-cbf0db998c41"))
//                .andExpect(jsonPath("$.title").value("category"))
                .andReturn();

        logger.info(mvcResult.getResponse().getContentAsString());
    }
    ...
}

-----------------------

@MockBean
private JwtUtil jwtUtil;

    if (authorizationHeader != null && authorizationHeader.startsWith("Bearer ")) {
        jwt = authorizationHeader.substring(7);
        username = jwtUtil.extractUsername(jwt);
    }

@WebMvcTest(value = CategoryCommandController.class, includeFilters = {
        // to include JwtUtil in spring context
        @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, classes = JwtUtil.class)})
class CategoryCommandControllerTest {

    Logger logger = LoggerFactory.getLogger(CategoryCommandController.class);

    @MockBean
    private CategoryCommandService categoryCommandService;

    @Autowired
    private MockMvc mockMvc;

    @MockBean
    private MyUserDetailsService myUserDetailsService;

    @MockBean
    private CategoryRepository categoryRepository;

    @Autowired
    private JwtUtil jwtUtil;

    @Autowired
    private JwtRequestFilter filter;

    //    @WithMockUser
    @Test
    void testCreateCategory() throws Exception {

        CategoryCreateDto categoryCreateDto = new CategoryCreateDto("category");
        CategoryCreateDto categoryCreateResponseDto = new CategoryCreateDto(UUID.fromString("2da4002a-31c5-4cc7-9b92-cbf0db998c41"), "category");

        String jsonCreate = asJsonString(categoryCreateDto);
        String jsonResponse = asJsonString(categoryCreateResponseDto);
        UserDetails dummy = new User("foo@email.com", "foo", new ArrayList<>());
        String jwtToken = jwtUtil.generateToken(dummy);
        RequestBuilder request = MockMvcRequestBuilders
                .post("/api/adverts/category")
                .content(jsonCreate)
                .header("Authorization", "Bearer " + jwtToken)
                .contentType(MediaType.APPLICATION_JSON_VALUE)
                .accept(MediaType.APPLICATION_JSON);
// Below line is not used
//        mockMvc.perform(request).andReturn();

        //             Should be createCategory(eq(categoryCreateDto))?
        when(categoryCommandService.createCategory(categoryCreateDto)).thenReturn(
                categoryCreateResponseDto);
        // Mock Service method used in JwtRequestFilter
        when(myUserDetailsService.loadUserByUsername(eq("foo@email.com"))).thenReturn(dummy);
        MvcResult mvcResult = mockMvc.perform(request)
                .andExpect(status().is2xxSuccessful())
//                .andExpect(content().json(jsonResponse, true))
                .andExpect(jsonPath("$.id").value("2da4002a-31c5-4cc7-9b92-cbf0db998c41"))
//                .andExpect(jsonPath("$.title").value("category"))
                .andReturn();

        logger.info(mvcResult.getResponse().getContentAsString());
    }
    ...
}

-----------------------

@MockBean
private JwtUtil jwtUtil;

    if (authorizationHeader != null && authorizationHeader.startsWith("Bearer ")) {
        jwt = authorizationHeader.substring(7);
        username = jwtUtil.extractUsername(jwt);
    }

@WebMvcTest(value = CategoryCommandController.class, includeFilters = {
        // to include JwtUtil in spring context
        @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, classes = JwtUtil.class)})
class CategoryCommandControllerTest {

    Logger logger = LoggerFactory.getLogger(CategoryCommandController.class);

    @MockBean
    private CategoryCommandService categoryCommandService;

    @Autowired
    private MockMvc mockMvc;

    @MockBean
    private MyUserDetailsService myUserDetailsService;

    @MockBean
    private CategoryRepository categoryRepository;

    @Autowired
    private JwtUtil jwtUtil;

    @Autowired
    private JwtRequestFilter filter;

    //    @WithMockUser
    @Test
    void testCreateCategory() throws Exception {

        CategoryCreateDto categoryCreateDto = new CategoryCreateDto("category");
        CategoryCreateDto categoryCreateResponseDto = new CategoryCreateDto(UUID.fromString("2da4002a-31c5-4cc7-9b92-cbf0db998c41"), "category");

        String jsonCreate = asJsonString(categoryCreateDto);
        String jsonResponse = asJsonString(categoryCreateResponseDto);
        UserDetails dummy = new User("foo@email.com", "foo", new ArrayList<>());
        String jwtToken = jwtUtil.generateToken(dummy);
        RequestBuilder request = MockMvcRequestBuilders
                .post("/api/adverts/category")
                .content(jsonCreate)
                .header("Authorization", "Bearer " + jwtToken)
                .contentType(MediaType.APPLICATION_JSON_VALUE)
                .accept(MediaType.APPLICATION_JSON);
// Below line is not used
//        mockMvc.perform(request).andReturn();

        //             Should be createCategory(eq(categoryCreateDto))?
        when(categoryCommandService.createCategory(categoryCreateDto)).thenReturn(
                categoryCreateResponseDto);
        // Mock Service method used in JwtRequestFilter
        when(myUserDetailsService.loadUserByUsername(eq("foo@email.com"))).thenReturn(dummy);
        MvcResult mvcResult = mockMvc.perform(request)
                .andExpect(status().is2xxSuccessful())
//                .andExpect(content().json(jsonResponse, true))
                .andExpect(jsonPath("$.id").value("2da4002a-31c5-4cc7-9b92-cbf0db998c41"))
//                .andExpect(jsonPath("$.title").value("category"))
                .andReturn();

        logger.info(mvcResult.getResponse().getContentAsString());
    }
    ...
}

How to return the argument, which the mock method was called with, as response?

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when(myObjectRepository.save(any(MyObject.class)))
     .then(AdditionalAnswers.returnsFirstArg());

Missing stub error on mockito in flutter. Trying to use setString on mocked SharedPreferences

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group('cacheNumberTrivia', () {
    const tNumberTriviaModel =
        NumberTriviaModel(number: 1, text: 'Test trivia');

    test('should call sharedPreferences to cache the data', () async {
      when(mockSharedPreferences.setString(any, any))
          .thenAnswer((_) async => true);
      dataSource.cacheLastNumberTrivia(tNumberTriviaModel);
      final expectedJsonString = jsonEncode(tNumberTriviaModel.toJson());
      verify(mockSharedPreferences.setString(
          cachedNumberTrivia, expectedJsonString));
    });
  });

when(mockSharedPreferences.setString(any, any))
          .thenAnswer((_) async => true);

-----------------------

group('cacheNumberTrivia', () {
    const tNumberTriviaModel =
        NumberTriviaModel(number: 1, text: 'Test trivia');

    test('should call sharedPreferences to cache the data', () async {
      when(mockSharedPreferences.setString(any, any))
          .thenAnswer((_) async => true);
      dataSource.cacheLastNumberTrivia(tNumberTriviaModel);
      final expectedJsonString = jsonEncode(tNumberTriviaModel.toJson());
      verify(mockSharedPreferences.setString(
          cachedNumberTrivia, expectedJsonString));
    });
  });

when(mockSharedPreferences.setString(any, any))
          .thenAnswer((_) async => true);

Data Class with Nullable Parameter in Kotlin 1.5.0 & 1.6.0 Throwing BackendException

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import org.jetbrains.kotlin.gradle.tasks.KotlinCompile

plugins {
    val kotlinVersion = "1.6.0"
    kotlin("jvm") version kotlinVersion
}

repositories {
    mavenCentral()
}

PowerMockito returns null when mocking private method for testing public method

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@RunWith(PowerMockRunner.class)
@PrepareForTest(TextManager.class)
public class TextManagerTest {

  @Test
  public void checkIfConcatenationWorks() throws Exception {
    // Arrange
    TextManager textmanager = PowerMockito.spy(new TextManager());
    PowerMockito.doReturn("someText").when(textmanager,"concatenateTwoString"
    , Mockito.anyString()
    , Mockito.anyString());

    // Act
    String text = textmanager.concatenate("ji","bo");

    // Assert
    assertThat(text).isEqualTo("jibo");
  }
}

-----------------------

 <dependency>
        <groupId>org.junit.jupiter</groupId>
        <artifactId>junit-jupiter-engine</artifactId>
        <version>5.8.1</version>
    </dependency>
    <dependency>
        <groupId>org.junit.vintage</groupId>
        <artifactId>junit-vintage-engine</artifactId>
        <version>5.8.1</version>
    </dependency>


    <dependency>
        <groupId>org.powermock</groupId>
        <artifactId>powermock-module-junit4</artifactId>
        <version>2.0.9</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.powermock</groupId>
        <artifactId>powermock-api-mockito2</artifactId>
        <version>2.0.9</version>
        <scope>test</scope>
    </dependency>

    import org.junit.Assert;
    import org.junit.jupiter.api.Assertions;
    import org.junit.jupiter.api.Test;
    import org.junit.runner.RunWith;
    import org.mockito.Mockito;
    import org.powermock.api.mockito.PowerMockito;
    import org.powermock.core.classloader.annotations.PrepareForTest;
    import org.powermock.modules.junit4.PowerMockRunner;
    
    @PrepareForTest(TextManager.class)
    @RunWith(PowerMockRunner.class)
    public class TextManagerTest {
    
        @org.junit.Test  //Test using Junit4
        public void checkIfConcatenationWorksWithJunit4() throws Exception {
            TextManager textmanager = PowerMockito.spy(new TextManager());
            PowerMockito.doReturn("jibo").when(textmanager, "concatenateTwoString", Mockito.anyString(), Mockito.anyString());
            String text = textmanager.concatenate("ji", "bo");
            Assert.assertEquals(text,"jibo");
        }
    
        @Test  //Test using Junit5
        public void checkIfConcatenationWorksWithJunit5() {
            Assertions.assertEquals("text","jibo");
        }
    }

   <build>
        <plugins>
            <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.2</version>
            </plugin>
        </plugins>
    </build>

-----------------------

 <dependency>
        <groupId>org.junit.jupiter</groupId>
        <artifactId>junit-jupiter-engine</artifactId>
        <version>5.8.1</version>
    </dependency>
    <dependency>
        <groupId>org.junit.vintage</groupId>
        <artifactId>junit-vintage-engine</artifactId>
        <version>5.8.1</version>
    </dependency>


    <dependency>
        <groupId>org.powermock</groupId>
        <artifactId>powermock-module-junit4</artifactId>
        <version>2.0.9</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.powermock</groupId>
        <artifactId>powermock-api-mockito2</artifactId>
        <version>2.0.9</version>
        <scope>test</scope>
    </dependency>

    import org.junit.Assert;
    import org.junit.jupiter.api.Assertions;
    import org.junit.jupiter.api.Test;
    import org.junit.runner.RunWith;
    import org.mockito.Mockito;
    import org.powermock.api.mockito.PowerMockito;
    import org.powermock.core.classloader.annotations.PrepareForTest;
    import org.powermock.modules.junit4.PowerMockRunner;
    
    @PrepareForTest(TextManager.class)
    @RunWith(PowerMockRunner.class)
    public class TextManagerTest {
    
        @org.junit.Test  //Test using Junit4
        public void checkIfConcatenationWorksWithJunit4() throws Exception {
            TextManager textmanager = PowerMockito.spy(new TextManager());
            PowerMockito.doReturn("jibo").when(textmanager, "concatenateTwoString", Mockito.anyString(), Mockito.anyString());
            String text = textmanager.concatenate("ji", "bo");
            Assert.assertEquals(text,"jibo");
        }
    
        @Test  //Test using Junit5
        public void checkIfConcatenationWorksWithJunit5() {
            Assertions.assertEquals("text","jibo");
        }
    }

   <build>
        <plugins>
            <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.2</version>
            </plugin>
        </plugins>
    </build>

-----------------------

 <dependency>
        <groupId>org.junit.jupiter</groupId>
        <artifactId>junit-jupiter-engine</artifactId>
        <version>5.8.1</version>
    </dependency>
    <dependency>
        <groupId>org.junit.vintage</groupId>
        <artifactId>junit-vintage-engine</artifactId>
        <version>5.8.1</version>
    </dependency>


    <dependency>
        <groupId>org.powermock</groupId>
        <artifactId>powermock-module-junit4</artifactId>
        <version>2.0.9</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.powermock</groupId>
        <artifactId>powermock-api-mockito2</artifactId>
        <version>2.0.9</version>
        <scope>test</scope>
    </dependency>

    import org.junit.Assert;
    import org.junit.jupiter.api.Assertions;
    import org.junit.jupiter.api.Test;
    import org.junit.runner.RunWith;
    import org.mockito.Mockito;
    import org.powermock.api.mockito.PowerMockito;
    import org.powermock.core.classloader.annotations.PrepareForTest;
    import org.powermock.modules.junit4.PowerMockRunner;
    
    @PrepareForTest(TextManager.class)
    @RunWith(PowerMockRunner.class)
    public class TextManagerTest {
    
        @org.junit.Test  //Test using Junit4
        public void checkIfConcatenationWorksWithJunit4() throws Exception {
            TextManager textmanager = PowerMockito.spy(new TextManager());
            PowerMockito.doReturn("jibo").when(textmanager, "concatenateTwoString", Mockito.anyString(), Mockito.anyString());
            String text = textmanager.concatenate("ji", "bo");
            Assert.assertEquals(text,"jibo");
        }
    
        @Test  //Test using Junit5
        public void checkIfConcatenationWorksWithJunit5() {
            Assertions.assertEquals("text","jibo");
        }
    }

   <build>
        <plugins>
            <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.2</version>
            </plugin>
        </plugins>
    </build>

Mock a method coming from parent class to return a mocked data

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@RunWith(PowerMockRunner.class)
public class OfferServiceTest {

    @Spy
    @InjectMocks
    private OfferService offerService = new OfferService();

    @Mock
    private RestTemplate restTemplate;

    @Mock
    private HttpEntity<Object> entity;


    @Test
    public void test() {
        PowerMockito.when(offerService, "getHttpEntity", "www.example.com")
            .thenReturn(entity);

        PowerMockito.when(restTemplate.exchange(anyString(), any(), any(), any()))
                .thenReturn(something);

        assertEquals(someObject, offerService.get());
    }
}

@ExtendWith(MockitoExtension.class)
public class OfferServiceTest {

    @Spy
    @InjectMocks
    private OfferService offerService;

    @Mock
    private RestTemplate restTemplate;

    @Mock
    private HttpEntity<Object> entity;


    @Test
    public void test() {
        when(ReflectionTestUtils.invokeMethod(offerService, "getHttpEntity", "www.example.com"))
                .thenReturn(entity);

        when(restTemplate.exchange(anyString(), any(), any(), any()))
                .thenReturn(something);

        assertEquals(someObject, offerService.get());
    }
}

-----------------------

@RunWith(PowerMockRunner.class)
public class OfferServiceTest {

    @Spy
    @InjectMocks
    private OfferService offerService = new OfferService();

    @Mock
    private RestTemplate restTemplate;

    @Mock
    private HttpEntity<Object> entity;


    @Test
    public void test() {
        PowerMockito.when(offerService, "getHttpEntity", "www.example.com")
            .thenReturn(entity);

        PowerMockito.when(restTemplate.exchange(anyString(), any(), any(), any()))
                .thenReturn(something);

        assertEquals(someObject, offerService.get());
    }
}

@ExtendWith(MockitoExtension.class)
public class OfferServiceTest {

    @Spy
    @InjectMocks
    private OfferService offerService;

    @Mock
    private RestTemplate restTemplate;

    @Mock
    private HttpEntity<Object> entity;


    @Test
    public void test() {
        when(ReflectionTestUtils.invokeMethod(offerService, "getHttpEntity", "www.example.com"))
                .thenReturn(entity);

        when(restTemplate.exchange(anyString(), any(), any(), any()))
                .thenReturn(something);

        assertEquals(someObject, offerService.get());
    }
}

See all related Code Snippets

Community Discussions

Trending Discussions on mockito

Skipping a method execution using Mockito
Mockito can not mock Random in Java 17
Java generics from Kotlin when verifying using Mockito?
Mockito vs Mocktail in Flutter
Unit testing retry in Spring Webflux with mocked response
How to write Junit test for methods with local variables
How to mock JWT token to use it with Mockito and Spring Boot
How to return the argument, which the mock method was called with, as response?
Missing stub error on mockito in flutter. Trying to use setString on mocked SharedPreferences
Data Class with Nullable Parameter in Kotlin 1.5.0 & 1.6.0 Throwing BackendException

Trending Discussions on mockito

QUESTION

Skipping a method execution using Mockito

Asked 2022-Mar-21 at 09:41

I’m using Mockito for unit testing and I want to skip the execution of a method.

I referred to this ticket Skip execution of a line using Mockito. Here, I assume doSomeTask() and createLink() methods are in different classes. But in my case, both the methods are in the same class (ActualClass.java).

//Actual Class

public class ActualClass{
    
    //The method being tested
    public void method(){
        //some business logic
        validate(param1, param2);

        //some business logic
    }

    public void validate(arg1, arg2){
        //do something
    }
}

//Test class

public class ActualClassTest{

    @InjectMocks
    private ActualClass actualClassMock;

    @Test
    public void test_method(){

        ActualClass actualClass = new ActualClass();
        ActualClass spyActualClass = Mockito.spy(actualClass);

        // validate method creates a null pointer exception, due to some real time data fetch from elastic

        doNothing().when(spyActualClass).validate(Mockito.any(), Mockito.any());
        actualClassMock.method();
    }
}

Since there arises a null pointer exception when the validate method is executed, I’m trying to skip the method call by spying the ActualClass object as stated in the ticket I mentioned above. Still, the issue is not resolve. The validate method gets executed and creates a null pointer exception due to which the actual test method cannot be covered.

So, how do I skip the execution of the validate() method that is within the same class.

ANSWER

Answered 2022-Mar-04 at 09:36

You must always use your spy class when calling method().

   @Test
    public void test_method(){
        ActualClass spyActualClass = Mockito.spy(actualClassMock);

        doNothing().when(spyActualClass).validate(Mockito.any(), Mockito.any());
        spyActualClass.method();
    }

In practice, instead of

actualClassMock.method();

you must use

spyActualClass.method();

Source https://stackoverflow.com/questions/71349090

QUESTION

Mockito can not mock Random in Java 17

Asked 2022-Feb-08 at 16:20

Trying to update my project from Java 11 to Java 17 and got an unexpected error from Mockito in a specific test.

mock(java.util.Random.class);

Throws

Feb 04, 2022 3:07:01 PM com.google.inject.internal.MessageProcessor visit
INFO: An exception was caught and reported. Message: java.lang.IllegalAccessException: class 
    net.bytebuddy.description.annotation.AnnotationDescription$ForLoadedAnnotation cannot access interface
    jdk.internal.util.random.RandomSupport$RandomGeneratorProperties (in module java.base) 
    because module java.base does not export jdk.internal.util.random to unnamed module @2f54a33d
org.mockito.exceptions.base.MockitoException: 
Mockito cannot mock this class: class java.util.Random.

Mockito can only mock non-private & non-final classes.
If you're not sure why you're getting this error, please report to the mailing list.


Java               : 17
JVM vendor name    : Oracle Corporation
JVM vendor version : 17.0.2+8-86
JVM name           : OpenJDK 64-Bit Server VM
JVM version        : 17.0.2+8-86
JVM info           : mixed mode, sharing
OS name            : Mac OS X
OS version         : 12.1

Not sure why Mockito is failing on this test.

ANSWER

Answered 2022-Feb-08 at 16:20

The issue here is mockito (via ByteBuddy) is trying to use an inaccessible type at runtime (via reflection). From Java 9 onwards, not all modules are accessible unless you explicitly export/open them.

As this is a runtime issue, you can add --add-opens as a JVM arg/CLI option to make this type accessible.

As per the Oracle guide here, --add-opens does the following.

If you have to allow code on the classpath to do deep reflection to access nonpublic members, then use the --add-opens runtime option.

If you want to export internal types available in compile time as well, you can use --add-exports.

To solve your specific issue; use the following.

--add-opens java.base/jdk.internal.util.random=ALL-UNNAMED.

ALL-UNNAMED means, a specified package is available in the entire codebase.

However, mocking types that don't belong to you is not a good practice. Maybe, you can simplify this if there's an alternative.

Source https://stackoverflow.com/questions/70993863

QUESTION

Unit testing retry in Spring Webflux with mocked response

Asked 2022-Jan-19 at 15:18

During unit testing retry the response of the mock seems cached, or most probably I am doing something wrong.

I am trying to request something, if error happened then retry twice with delay of 1 second.

  public Mono<Object> someMethod(String someParam) {
    return someInjectedService.doSomething(someParam)
        .doOnError(ex -> System.out.println(ex + ": " + System.currentTimeMillis()))
        .retryWhen(Retry.fixedDelay(2, Duration.ofSeconds(1)).filter(ex -> ex instanceof SomeCustomException))
        .doOnSuccess(result -> doSomethingOnSuccess(result));
  }

My test:

  @Test
  void testshouldRequestThrice_whenErrorOccurs() {
    // Given
    String someParam = "testParam";
    when(someInjectedService.doSomething(someParam))
        .thenReturn(Mono.error(new SomeCustomException("SomeCustomException"))) // 1st response
        .thenReturn(Mono.error(new SomeCustomException("SomeCustomException"))) // 2nd response
        .thenReturn(Mono.just("SomeValidResponse")); // 3rd valid response

    // When
    var result = testService.someMethod(someParam).block();

    // Then
    // Initial request, followed by two retries
    verify(someInjectedService, times(3)).doSomething(someParam);
  }

here someInjectedService is a mock. My plan was to return an exception twice, and on third request return valid response. But what I get is:

org.mockito.exceptions.verification.TooFewActualInvocations: someInjectedService.doSomething("testParam");

Wanted 3 times: -> at shouldRequestThrice_whenErrorOccurs(test.java:138)

But was 1 time:

While I do see 3 prints from .doOnError(ex -> System.out.println(ex + ": " + System.currentTimeMillis())) block, I feel like the actual request is sent only once.

Thank you in advance,

ANSWER

Answered 2022-Jan-19 at 15:18

someInjectedService.doSomething(...) will indeed technically be called only once.

You could use Mono.defer(() -> someInjectedService.doSomething(someParam)) instead, to ensure the method is effectively called again, which should make your test pass.

Source https://stackoverflow.com/questions/70770215

QUESTION

How to write Junit test for methods with local variables

Asked 2022-Jan-14 at 12:00

I have written a method which asks user to press enter to continue and timeouts after some time. I am facing difficulty in writing Junit tests for this method use Mockito. Below is the method.

private static final ExecutorService l = Executors.newFixedThreadPool(1);

private static String getUserInputWithTimeout(int timeout) {
    Callable<String> k = () -> new Scanner(System.in).nextLine();
    LocalDateTime start = LocalDateTime.now();
    Future<String> g = l.submit(k);
    while (ChronoUnit.SECONDS.between(start, LocalDateTime.now()) < timeout) {
        if (g.isDone()) {
            try {
                String choice = g.get();
                return choice;
            } catch (InterruptedException | ExecutionException | IllegalArgumentException e) {
                logger.error("ERROR", e);
                g = l.submit(k);
            }
        }
    }
    logger.info("Timeout...");
    g.cancel(true);
    return null;
}

I tried mocking Callable and Future but as this method is creating them locally creating them in Test has no impact.

I tried few things but didnt work as expected I might be doing it wrong.

@Test
    public void testgetUserInputWithUserInput() throws Exception {
        
         Scanner scanner = new Scanner(System.in);
         Callable<String> callable = PowerMockito.mock(Callable.class);
        

         ExecutorService executorServiceMock = PowerMockito.mock(ExecutorService.class);
     
         Future<String> futureMock = PowerMockito.mock(Future.class);
         when(executorServiceMock.submit(any(Callable.class))).thenReturn(futureMock);


        assertEquals("", getUserInputWithTimeout(3));
    }

ANSWER

Answered 2022-Jan-14 at 11:58

I would say you need to slightly change your method, take the callable object out of method and pass it as a parameter, this should solve your problem with mocking.

private static final ExecutorService l = Executors.newFixedThreadPool(1);

private static String getUserInputWithTimeout(int timeout, Callable<String> k) {
    LocalDateTime start = LocalDateTime.now();
    Future<String> g = l.submit(k);
    while (ChronoUnit.SECONDS.between(start, LocalDateTime.now()) < timeout) {
        if (g.isDone()) {
            try {
                String choice = g.get();
                return choice;
            } catch (InterruptedException | ExecutionException | IllegalArgumentException e) {
                logger.error("ERROR", e);
                g = l.submit(k);
            }
        }
    }
    logger.info("Timeout...");
    g.cancel(true);
    return null;
}

Your tests should look like below :

@Test
public void testgetUserInputWithUserInput() throws Exception {
    
    String ENTER = " ";
    System.setIn(new ByteArrayInputStream(ENTER.getBytes()));

    Callable<String> callable = () -> new Scanner(System.in).nextLine();

    assertEquals(ENTER, getUserInputWithTimeout(5, callable));
}

Source https://stackoverflow.com/questions/70697616

QUESTION

How to mock JWT token to use it with Mockito and Spring Boot

Asked 2021-Dec-26 at 05:59

I have a controller which gives the user a 403 response unless they are authenticated with a JWT token which is passed as a Bearer token via the authorization header. I'm looking for resources on how to test this with Mockito but I'm not very successful so far as most of them tell me to use the @WithMockUser annotation, which I understand is for Spring security yes, but does not include the mocking for a JWT token. I've tried to mock a few objects such as the UserDetailsClass and the JwtFilter and even hardcoding the bearer token but I think there should be more to it.

@MockBean
private CategoryCommandService categoryCommandService;

@Autowired
private MockMvc mockMvc;

@MockBean
private MyUserDetailsService myUserDetailsService;

@MockBean
private CategoryRepository categoryRepository;

@MockBean
private JwtUtil jwtUtil;

@Autowired
private JwtRequestFilter filter;


@Test
void testCreateCategory() throws Exception {

    CategoryCreateDto categoryCreateDto = new CategoryCreateDto("category");
    CategoryCreateDto categoryCreateResponseDto = new CategoryCreateDto(UUID.fromString("2da4002a-31c5-4cc7-9b92-cbf0db998c41"), "category");

    String jsonCreate = asJsonString(categoryCreateDto);
    String jsonResponse = asJsonString(categoryCreateResponseDto);

    RequestBuilder request = MockMvcRequestBuilders
            .post("/api/adverts/category")
            .content(jsonCreate)
            .header("Authorization", "Bearer eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJmb29AZW1haWwuY29tIiwiZXhwIjoxNjM4ODU1MzA1LCJpYXQiOjE2Mzg4MTkzMDV9.q4FWV7yVDAs_DREiF524VZ-udnqwV81GEOgdCj6QQAs")
            .contentType(MediaType.APPLICATION_JSON_VALUE)
            .accept(MediaType.APPLICATION_JSON);
    mockMvc.perform(request).andReturn();

    when(categoryCommandService.createCategory(categoryCreateDto)).thenReturn(
            categoryCreateResponseDto);

    MvcResult mvcResult = mockMvc.perform(request)
            .andExpect(status().is2xxSuccessful())
            .andExpect(content().json(jsonResponse, true))
            .andExpect(jsonPath("$.id").value("2da4002a-31c5-4cc7-9b92-cbf0db998c41"))
            .andExpect(jsonPath("$.title").value("category"))
            .andReturn();

    logger.info(mvcResult.getResponse().getContentAsString());
}

Here my controller:

@CrossOrigin
@RequestMapping("/api/adverts/category")
@RestController
public class CategoryCommandController {

@Autowired
private CategoryCommandService categoryCommandService;

@Autowired
private CategoryRepository categoryRepository;

@PostMapping(produces = MediaType.APPLICATION_JSON_VALUE, consumes = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<Object> createCategory(@RequestBody CategoryCreateDto categoryCreateDto) {

    if (categoryCreateDto.getTitle() != null) {
        return new ResponseEntity<>(categoryCommandService.createCategory(categoryCreateDto), HttpStatus.CREATED);
    }
    else {
        return new ResponseEntity<>(new FeedbackMessage("Missing title"), HttpStatus.BAD_REQUEST);
    }

}
}

And here my filter:

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.web.authentication.WebAuthenticationDetailsSource;
import org.springframework.stereotype.Component;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

import static com.example.adverts.SecurityConstants.SIGN_UP_URL;

@Component
public class JwtRequestFilter extends OncePerRequestFilter {

@Autowired
private MyUserDetailsService userDetailsService;

@Autowired
private JwtUtil jwtUtil;

@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain)
        throws ServletException, IOException {

    String path = request.getRequestURI();
    if (path.equals(SIGN_UP_URL)) {
        chain.doFilter(request, response);
        return;
    }

    final String authorizationHeader = request.getHeader("Authorization");

    String username = null;
    String jwt = null;

    if (authorizationHeader != null && authorizationHeader.startsWith("Bearer ")) {
        jwt = authorizationHeader.substring(7);
        username = jwtUtil.extractUsername(jwt);
    } else {

        response.setStatus(HttpStatus.FORBIDDEN.value());
    }

    if (username != null) {

        UserDetails userDetails = this.userDetailsService.loadUserByUsername(username);

        if (jwtUtil.validateToken(jwt, userDetails)) {

            UsernamePasswordAuthenticationToken usernamePasswordAuthenticationToken = new UsernamePasswordAuthenticationToken(
                    userDetails, null, userDetails.getAuthorities());
            usernamePasswordAuthenticationToken
                    .setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
            SecurityContextHolder.getContext().setAuthentication(usernamePasswordAuthenticationToken);
        }

        chain.doFilter(request, response);

    }


}

}

And JwtUtil class:

@Service
public class JwtUtil {

private String SECRET_KEY = "secret";

public String extractUsername(String token) {
    return extractClaim(token, Claims::getSubject);
}

public Date extractExpiration(String token) {
    return extractClaim(token, Claims::getExpiration);
}

public <T> T extractClaim(String token, Function<Claims, T> claimsResolver) {
    final Claims claims = extractAllClaims(token);
    return claimsResolver.apply(claims);
}
private Claims extractAllClaims(String token) {
    return Jwts.parser().setSigningKey(SECRET_KEY).parseClaimsJws(token).getBody();
}

private Boolean isTokenExpired(String token) {
    return extractExpiration(token).before(new Date());
}

public String generateToken(UserDetails userDetails) {
    Map<String, Object> claims = new HashMap<>();
    return createToken(claims, userDetails.getUsername());
}

private String createToken(Map<String, Object> claims, String subject) {

    return Jwts.builder().setClaims(claims).setSubject(subject).setIssuedAt(new Date(System.currentTimeMillis()))
            .setExpiration(new Date(System.currentTimeMillis() + 1000 * 60 * 60 * 10))
            .signWith(SignatureAlgorithm.HS256, SECRET_KEY).compact();
}

public Boolean validateToken(String token, UserDetails userDetails) {
    final String username = extractUsername(token);
    return (username.equals(userDetails.getUsername()) && !isTokenExpired(token));
}
}

Here is the whole Github branch.

https://github.com/francislainy/adverts-backend/tree/dev_jwt

Thank you.

UPDATE

For clarity if I hardcode a valid token I get a 200 status code but my tests will still fail with nothing returned for content whereas before JWT and Spring security they were passing.

ANSWER

Answered 2021-Dec-26 at 05:59

We just fixed the issue (accepting the other answer for being a more elegant solution).

1st and easier option:

Disable filter authentication for controller test classes:

@AutoConfigureMockMvc(addFilters = false)
class CategoryCommandControllerTest {

You can then perhaps test jwt authorization separately.

2nd and perhaps better option:

Remove the extra pieces from the configure method within the WebSecurity class to end up with only this.

@Override
protected void configure(HttpSecurity http) throws Exception {

    http.csrf().disable();
}

Then under the JwtRequestFilter class add a return when a 403 is caught on the else part of this if block.

 if (authorizationHeader != null && authorizationHeader.startsWith("Bearer ")) {
        jwt = authorizationHeader.substring(7);
        username = jwtUtil.extractUsername(jwt);
    } else {
        response.setStatus(HttpStatus.FORBIDDEN.value());
        return;
    }

And move the doChain.filter piece outside of the other if block.

  if (username != null) {

        UserDetails userDetails = this.userDetailsService.loadUserByUsername(username);

        if (jwtUtil.validateToken(jwt, userDetails)) {

            UsernamePasswordAuthenticationToken usernamePasswordAuthenticationToken = new UsernamePasswordAuthenticationToken(
                    userDetails, null, userDetails.getAuthorities());
            usernamePasswordAuthenticationToken
                    .setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
            SecurityContextHolder.getContext().setAuthentication(usernamePasswordAuthenticationToken);
        }

        // chain.doFilter(request, response);

    }

    chain.doFilter(request, response);

}

Source https://stackoverflow.com/questions/70262617

QUESTION

Missing stub error on mockito in flutter. Trying to use setString on mocked SharedPreferences

Asked 2021-Dec-07 at 13:00

I'm trying to mock sharedPreferences using Mockito in my flutter project. Here is the error log.

package:mockito/src/mock.dart 190:7                                                                       Mock._noSuchMethod
package:mockito/src/mock.dart 184:45                                                                      Mock.noSuchMethod
test\feature\number_trivia\data\datasource\number_trivia_local_datasource_test.mocks.dart 67:14           MockSharedPreferences.setString
package:clean_arch_tdd/features/number_trivia/data/datasources/number_trivia_local_datasource.dart 31:30  NumberTriviaLocalDataSourceImpl.cacheLastNumberTrivia
test\feature\number_trivia\data\datasource\number_trivia_local_datasource_test.dart 51:18                 main.<fn>.<fn>

MissingStubError: 'setString'
No stub was found which matches the arguments of this method call:
setString('CACHED_NUMBER_TRIVIA', '{"text":"Test trivia","number":1}')

Add a stub for this method using Mockito's 'when' API, or generate the mock for MockSharedPreferences with 'returnNullOnMissingStub: true'.

The error refer to this line of code.

local_data_source_test.dart

test('should call sharedPreferences to cache the data', () {
      dataSource.cacheLastNumberTrivia(tNumberTriviaModel);
      final expectedJsonString = jsonEncode(tNumberTriviaModel.toJson());
      verify(mockSharedPreferences.setString(
          cachedNumberTrivia, expectedJsonString));
    });

local_data_source.dart

@override
  Future<void> cacheLastNumberTrivia(NumberTriviaModel triviaToCache) {
    return sharedPreferences.setString(
        cachedNumberTrivia, jsonEncode(triviaToCache.toJson()));
  }

It show that method setString from the mocked sharedPreferences is missing. I already run the pub command to generate the mocks. I also have some test case in the file that use the getString method. And it works fine.

Is there something I'm missing so I can't use the setString method? Or are there any solution to this problem?

Thx in advance.

ANSWER

Answered 2021-Dec-07 at 13:00

I actually figured it out, sorry for not posting the answer immediately.

I found myself forgot to call the stub for the setString method. Here is the code.

group('cacheNumberTrivia', () {
    const tNumberTriviaModel =
        NumberTriviaModel(number: 1, text: 'Test trivia');

    test('should call sharedPreferences to cache the data', () async {
      when(mockSharedPreferences.setString(any, any))
          .thenAnswer((_) async => true);
      dataSource.cacheLastNumberTrivia(tNumberTriviaModel);
      final expectedJsonString = jsonEncode(tNumberTriviaModel.toJson());
      verify(mockSharedPreferences.setString(
          cachedNumberTrivia, expectedJsonString));
    });
  });

The stub was actually this line:

when(mockSharedPreferences.setString(any, any))
          .thenAnswer((_) async => true);

I forgot to call the when method before verifying the result with verify, hence it throws an error.

Source https://stackoverflow.com/questions/69514208

QUESTION

Data Class with Nullable Parameter in Kotlin 1.5.0 & 1.6.0 Throwing BackendException

Asked 2021-Dec-06 at 07:56

Recently updated from Kotlin 1.4.20 to 1.5.30.

I have this class which used to compile no problem

data class Optional<M>(val value: M?)

However, after upgrading, I get the following exception

org.jetbrains.kotlin.backend.common.BackendException: Backend Internal error: Exception during IR lowering
File being compiled: .../Optional.kt
The root cause java.lang.RuntimeException was thrown at: org.jetbrains.kotlin.backend.jvm.codegen.FunctionCodegen.generate(FunctionCodegen.kt:50)
    at org.jetbrains.kotlin.backend.common.CodegenUtil.reportBackendException(CodegenUtil.kt:239)
    at org.jetbrains.kotlin.backend.common.CodegenUtil.reportBackendException$default(CodegenUtil.kt:235)
    at org.jetbrains.kotlin.backend.common.phaser.PerformByIrFilePhase.invokeSequential(performByIrFile.kt:68)
    at org.jetbrains.kotlin.backend.common.phaser.PerformByIrFilePhase.invoke(performByIrFile.kt:55)
    at org.jetbrains.kotlin.backend.common.phaser.PerformByIrFilePhase.invoke(performByIrFile.kt:41)
    at org.jetbrains.kotlin.backend.common.phaser.NamedCompilerPhase.invoke(CompilerPhase.kt:96)
    at org.jetbrains.kotlin.backend.common.phaser.CompositePhase.invoke(PhaseBuilders.kt:29)
    at org.jetbrains.kotlin.backend.common.phaser.NamedCompilerPhase.invoke(CompilerPhase.kt:96)
    at org.jetbrains.kotlin.backend.common.phaser.CompositePhase.invoke(PhaseBuilders.kt:29)
    at org.jetbrains.kotlin.backend.common.phaser.NamedCompilerPhase.invoke(CompilerPhase.kt:96)
    at org.jetbrains.kotlin.backend.common.phaser.CompilerPhaseKt.invokeToplevel(CompilerPhase.kt:43)
    at org.jetbrains.kotlin.backend.jvm.JvmIrCodegenFactory.doGenerateFilesInternal(JvmIrCodegenFactory.kt:191)
    at org.jetbrains.kotlin.backend.jvm.JvmIrCodegenFactory.generateModule(JvmIrCodegenFactory.kt:60)
    at org.jetbrains.kotlin.codegen.KotlinCodegenFacade.compileCorrectFiles(KotlinCodegenFacade.java:35)
    at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.generate(KotlinToJVMBytecodeCompiler.kt:321)
    at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$cli(KotlinToJVMBytecodeCompiler.kt:113)
    at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$cli$default(KotlinToJVMBytecodeCompiler.kt:56)
    at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:169)
    at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:52)
    at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:92)
    at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:44)
    at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:98)
    at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:412)
    at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:112)
    at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileIncrementally(IncrementalCompilerRunner.kt:358)
    at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileIncrementally$default(IncrementalCompilerRunner.kt:300)
    at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileImpl$rebuild(IncrementalCompilerRunner.kt:119)
    at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileImpl(IncrementalCompilerRunner.kt:170)
    at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:81)
    at org.jetbrains.kotlin.daemon.CompileServiceImplBase.execIncrementalCompiler(CompileServiceImpl.kt:607)
    at org.jetbrains.kotlin.daemon.CompileServiceImplBase.access$execIncrementalCompiler(CompileServiceImpl.kt:96)
    at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:1658)

I get that it's telling me that Any's toString() method doesn't have a body as I can see that from looking at the source code.

What I don't understand is how to rectify it.

EDIT

Can confirm this still happens when upgrading to kotlin version 1.6.0.

It also happens in this data class:

data class Advertisement(
    var id: String,
    var image: String,
    var navUrl: String?
)

My build.gradle file for this module looks like so:

apply plugin: 'kotlin'
apply plugin: 'kotlin-kapt'
apply plugin: 'com.stustirling.redacted-gradle-plugin'

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])

    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlinVersion"
    implementation "io.reactivex.rxjava2:rxkotlin:$rxKotlinVersion"
    implementation "io.reactivex.rxjava2:rxjava:$rxJavaVersion"
    implementation "com.jakewharton.timber:timber:$timberVersion"
    implementation "com.squareup.retrofit2:retrofit:$retrofitVersion"
    implementation "com.google.dagger:dagger:$daggerVersion"
    kapt "com.google.dagger:dagger-compiler:$daggerVersion"
    implementation "org.json:json:$testOrgJsonVersion"

    implementation "net.sf.biweekly:biweekly:$biweeklyVersion"

    testImplementation "junit:junit:$junitVersion"
    testImplementation "org.mockito.kotlin:mockito-kotlin:$mockitoKotlinVersion"
    testImplementation "org.mockito:mockito-inline:$mockitoInlineVersion"
    testImplementation "org.json:json:$testOrgJsonVersion"
}

redacted {
    redactAllDataClasses true
    redactClassName true
}


buildscript {
    repositories {
        mavenLocal()
        mavenCentral()
    }
    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion"
    }
}

ANSWER

Answered 2021-Dec-06 at 07:56

My Gradle couldn't find the redacted-gradle-plugin but both of your classes compiles with this minimalistic build.gradle.kts:

import org.jetbrains.kotlin.gradle.tasks.KotlinCompile

plugins {
    val kotlinVersion = "1.6.0"
    kotlin("jvm") version kotlinVersion
}

repositories {
    mavenCentral()
}

Also, while looking at the redacted page at https://github.com/StuStirling/redacted-compiler-plugin, it says "Kotlin compiler plugins are not a stable API", so at least do a "./gradlew clean"!

Source https://stackoverflow.com/questions/69643728

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