问题
I'm trying to create an instrumented test for Room DB I have in my app, but I keep getting this error:
java.lang.NoSuchMethodError: No static method inMemoryDatabaseBuilder(Landroid/content/Context;Ljava/lang/Class;)Landroid/arch/persistence/room/RoomDatabase$Builder; in class Landroid/arch/persistence/room/Room; or its super classes (declaration of 'android.arch.persistence.room.Room' appears in /data/app/com.example.android-nhsbta60PW8T0UpasgtR0B==/base.apk)
at com.example.android.FooDaoTest.<init>(FooDaoTest.kt:40)
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:334)
at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:217)
at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:266)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:27)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:58)
at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:375)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:2074)
This is my Gradle build configuration:
project:
buildscript {
ext {
kotlinVersion = '1.2.0'
supportLibVersion = '26.1.0'
archLibVersion = '1.0.0'
...
// Test libs
androidTestLibVersion = '1.0.1'
espressoVersion = '3.0.1'
powerMockVersion = '1.7.1'
}
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.0.1'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion"
}
}
allprojects {
repositories {
google()
jcenter()
}
}
app:
android {
compileSdkVersion 26
buildToolsVersion '26.0.3'
defaultConfig {
applicationId "com.example.android"
minSdkVersion 17
targetSdkVersion 26
versionCode 1
versionName "0.1"
...
multiDexEnabled true
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
debug {
minifyEnabled true
useProguard false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
release {
minifyEnabled true
shrinkResources true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:multidex:1.0.2'
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlinVersion"
...
implementation "android.arch.lifecycle:extensions:$archLibVersion"
implementation "android.arch.persistence.room:runtime:$archLibVersion"
kapt "android.arch.lifecycle:compiler:$archLibVersion"
kapt "android.arch.persistence.room:compiler:$archLibVersion"
...
// Test libs
testImplementation 'junit:junit:4.12'
testImplementation 'org.mockito:mockito-core:2.8.47'
testImplementation "org.powermock:powermock-module-junit4:$powerMockVersion"
testImplementation "org.powermock:powermock-api-mockito2:$powerMockVersion"
testImplementation 'org.hamcrest:hamcrest-library:1.3'
testImplementation "android.arch.core:core-testing:$archLibVersion"
testImplementation "com.squareup.okhttp3:mockwebserver:3.9.1"
androidTestImplementation "com.android.support.test:runner:$androidTestLibVersion"
androidTestImplementation "com.android.support.test:rules:$androidTestLibVersion"
androidTestImplementation("com.android.support.test.espresso:espresso-core:$espressoVersion", {
exclude group: 'com.android.support', module: 'support-annotations'
})
androidTestImplementation "com.android.support.test.espresso:espresso-contrib:$espressoVersion"
androidTestImplementation "com.android.support.test.espresso:espresso-intents:$espressoVersion"
androidTestImplementation "com.android.support.test.espresso:espresso-idling-resource:$espressoVersion"
androidTestImplementation 'com.android.support.test.uiautomator:uiautomator-v18:2.1.3'
androidTestUtil "com.android.support.test:orchestrator:$androidTestLibVersion"
}
And this is my instrumented test:
@RunWith(AndroidJUnit4::class)
class FooDaoTest {
private lateinit var db: AppDatabase
private lateinit var fooDao: FooDao
@Before
fun setUp() {
db = Room.inMemoryDatabaseBuilder(InstrumentationRegistry.getContext(), AppDatabase::class.java).build()
fooDao = db.fooDao()
}
@After
fun closeDb() {
// db.close()
}
@Test
fun save() {
...
}
}
I'm guessing the error has something to do with multidex, but I can't quite find why. Does anyone know why this is happening and how I can make this test work?
回答1:
Seems like it was some build issue I was having, I'm posting what fixed it for me in case it helps others:
I tried cleaning the project from Android Studio a lot of times and the issue persisted, however, when I cleaned the project from the command line using:
./gradlew clean
and then run the test again it worked.
UPDATE:
After some more testing, I found out that the real issue was with my Proguard configuration. I am using Proguard in the debug builds, which removes all the non-used classes/methods (Room.inMemoryDatabaseBuilder() being one of them). Once I disabled Proguard for the debug builds and cleaned up the project as specified above it started working. So to wrap up, the solution is:
- Disable Proguard for the debug build (or add a test Proguard configuration to the debug build):
Option 1:
buildTypes {
// debug {
// minifyEnabled true
// useProguard false
// proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
// }
...
}
Option 2:
buildTypes {
debug {
minifyEnabled true
useProguard false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
testProguardFiles 'proguard-rules-test.pro'
}
...
}
The contents of proguard-rules-test.pro will depend on what you need for your app.
Clean the project from the command line:
./gradlew clean
来源：https://stackoverflow.com/questions/47763453/room-inmemorydatabasebuilder-not-found-in-instrumented-test