Cannot initialize MockMaker

Question

This is my testing class:

class RocketListVMTest {

    @get:Rule
    var instantTaskExecutorRule = InstantTaskExecutorRule()

    private lateinit var sut: RocketListVM
    private var activeOnlyToggle = false

    private val repo: Repo = mock()

    @Before
    fun setUp() {
        sut = RocketListVM(repo)
        activeOnlyToggle = false
    }

    @Test
    fun toggleActiveOnlyWithTrueCallsRepository() {
        sut.toggleActiveOnly(true)

        verify(repo).getActiveOnlyLocalRockets()
    }
}

With the following dependencies:

androidTestImplementation "com.nhaarman.mockitokotlin2:mockito-kotlin:2.2.0"
androidTestImplementation 'com.linkedin.dexmaker:dexmaker-mockito-inline:2.21.0'
androidTestImplementation 'androidx.test:runner:1.3.0'
androidTestImplementation 'androidx.test.ext:junit:1.1.2'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
androidTestImplementation 'android.arch.core:core-testing:1.1.1'

I have created src/androidTest/resources/mockito-extensions/org.mockito.plugins.MockMaker with mock-maker-inline inside.

The test class fails because

java.lang.IllegalStateException: Could not initialize plugin: interface org.mockito.plugins.MockMaker (alternate: null)
Caused by: java.lang.IllegalStateException: Failed to load interface org.mockito.plugins.MockMaker implementation declared in sun.misc.CompoundEnumeration@dd6cba3
Caused by: org.mockito.exceptions.base.MockitoInitializationException: 
Could not initialize inline Byte Buddy mock maker. (This mock maker is not supported on Android.)

How to fix this problem? None of the SO answers helped.

Does this answer your question? [java.lang.IllegalStateException: Could not initialize plugin: MockMaker](https://stackoverflow.com/questions/41850779/java-lang-illegalstateexception-could-not-initialize-plugin-mockmaker) — RedDeath, Aug 09 '21 at 14:22
this fixed my issue https://stackoverflow.com/a/70844598/3675925 — Hamid Zandi, Mar 01 '22 at 01:19

Yin Shen · Answer 1 · 2021-03-03T09:18:57.377

20

This works:

dependencies {
    testImplementation 'org.mockito:mockito-core:3.8.0'
    androidTestImplementation 'org.mockito:mockito-android:3.8.0'
}

There are two packages: mockito-core is for test, while mockito-android is for android test.

ref java.lang.IllegalStateException: Could not initialize plugin: MockMaker

edited Mar 03 '21 at 09:18

answered Mar 03 '21 at 08:48

Yin Shen

256
1
4

Weird, I was only doing local unit test, but I also need to add AndroidTestImplementation import. And I need to use mockito version 3.8.0, 2.something doesn't work – BabyishTank Aug 29 '21 at 01:41

score 0 · Answer 2 · edited Dec 02 '21 at 14:57

0

I faced the same issue and I have solved it by using testImplementation instead of androidTestImplementation in build.gradle (app-level):

testImplementation 'com.linkedin.dexmaker:dexmaker-mockito-inline:2.21.0'

edited Dec 02 '21 at 14:57

Antoine

1,393
4
20
26

answered Dec 02 '21 at 04:33

Karishma Kumari

11
3

score 0 · Answer 3 · answered Nov 13 '22 at 13:40

I got the same problem recently, added the following dependencies explicitly alongside Mockito core and it worked

    <dependency>
        <groupId>net.bytebuddy</groupId>
        <artifactId>byte-buddy</artifactId>
        <version>1.12.18</version>
    </dependency>
    <dependency>
        <groupId>org.objenesis</groupId>
        <artifactId>objenesis</artifactId>
        <version>3.3</version>
        <scope>test</scope>
    </dependency>


    <dependency>
        <groupId>net.bytebuddy</groupId>
        <artifactId>byte-buddy-agent</artifactId>
        <version>1.12.18</version>
        <scope>test</scope>
    </dependency>

Cannot initialize MockMaker

3 Answers3