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A test rule to allow testing coroutines that use the main dispatcher. Without this you'd run into "java.lang.IllegalStateException: Module with the Main dispatcher had failed to initialize. For tests Dispatchers.setMain from kotlinx-coroutines-test module can be used"
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...... | |
dependencies { | |
def coroutinesVersion = "1.3.0-M1" | |
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutinesVersion" | |
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:$coroutinesVersion" | |
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-test:$coroutinesVersion" | |
testImplementation 'org.hamcrest:hamcrest-library:2.1' | |
testImplementation group: 'org.mockito', name: 'mockito-core', version: '2.25.0' | |
testImplementation 'junit:junit:4.12' | |
androidTestImplementation 'androidx.test:runner:1.2.0' | |
androidTestImplementation 'androidx.test:rules:1.2.0' | |
testImplementation group: 'org.mockito', name: 'mockito-core', version: '2.25.0' | |
} |
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package com.aniketkadam.sharevideoshortcut | |
import kotlinx.coroutines.Dispatchers | |
import kotlinx.coroutines.ExperimentalCoroutinesApi | |
import kotlinx.coroutines.test.TestCoroutineDispatcher | |
import kotlinx.coroutines.test.resetMain | |
import kotlinx.coroutines.test.setMain | |
import org.junit.rules.TestRule | |
import org.junit.runner.Description | |
import org.junit.runners.model.Statement | |
@ExperimentalCoroutinesApi | |
class CoroutineTestRule : TestRule { | |
override fun apply(base: Statement?, description: Description?): Statement = | |
object : Statement() { | |
override fun evaluate() { | |
Dispatchers.setMain(TestCoroutineDispatcher()) | |
try { | |
base?.evaluate() | |
} finally { | |
Dispatchers.resetMain() | |
} | |
} | |
} | |
} | |
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import kotlinx.coroutines.Dispatchers | |
import kotlinx.coroutines.ExperimentalCoroutinesApi | |
import kotlinx.coroutines.test.runBlockingTest | |
import org.junit.Before | |
import org.junit.Rule | |
import org.junit.Test | |
import org.junit.runner.RunWith | |
import org.junit.runners.JUnit4 | |
import org.mockito.Mock | |
import org.mockito.Mockito.* | |
import org.mockito.MockitoAnnotations | |
import org.mockito.Mockito.`when` as wh | |
@RunWith(JUnit4::class) | |
class ExampleTest { | |
@ExperimentalCoroutinesApi | |
@get:Rule | |
val coroutineTestRule = CoroutineTestRule() | |
@ExperimentalCoroutinesApi | |
@Test | |
fun exampleTest() = runBlockingTest { | |
val result = suspendingFunction() | |
assert(result) | |
} | |
} |
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