Android:Espresso:WireMock java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/common/io/Resources;

Question

Android Studio 3.2. I want to use WireMock in my Espresso's test.

In build.gradle

buildscript {
    ext.KOTLIN_VERSION = '1.3.21'
    ext.ESPRESSO_VERSION = '3.2.0-alpha02'

    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.3.2'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$KOTLIN_VERSION"

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

in app/build.gradle

android {
    dataBinding {
        enabled = true
    }
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.myproject"
        minSdkVersion 18
        targetSdkVersion 28
        versionCode 6
        versionName "0.0.7"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
        androidTest.java.srcDirs += 'src/androidTest/kotlin'
    }


dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation('com.crashlytics.sdk.android:crashlytics:2.7.0@aar') { transitive = true; }

    implementation 'androidx.appcompat:appcompat:1.1.0-alpha03'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    implementation 'androidx.lifecycle:lifecycle-extensions:2.1.0-alpha03'
    implementation 'androidx.recyclerview:recyclerview:1.1.0-alpha03'
    implementation 'com.android.support:design:28.0.0'
    implementation 'com.chauthai.swipereveallayout:swipe-reveal-layout:1.4.1'
    implementation 'com.squareup.okhttp3:logging-interceptor:3.8.0'
    implementation 'com.squareup.retrofit2:converter-gson:2.1.0'
    implementation 'com.squareup.retrofit2:retrofit:2.5.0'
    implementation 'com.yuyh.json:jsonviewer:1.0.6'
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$KOTLIN_VERSION"

    implementation project(':common')

    androidTestImplementation "androidx.test.espresso:espresso-core:$ESPRESSO_VERSION"
    androidTestImplementation "androidx.test.espresso:espresso-intents:$ESPRESSO_VERSION"
    androidTestImplementation "androidx.test.espresso:espresso-contrib:$ESPRESSO_VERSION"

    androidTestImplementation 'androidx.test:rules:1.1.2-alpha02'
    androidTestImplementation 'androidx.test:runner:1.1.2-alpha02'

    androidTestImplementation("com.github.tomakehurst:wiremock:2.18.0") {
        exclude group: 'org.apache.httpcomponents', module: 'httpclient'
        exclude group: 'asm', module: 'asm'
        exclude group: 'org.json', module: 'json'
        exclude group: 'com.google.guava', module:'guava'
    }

    testImplementation 'junit:junit:4.12'
}

Here my Espresso's test:

import android.content.Intent
import androidx.test.filters.SmallTest
import androidx.test.runner.AndroidJUnit4
import org.junit.Rule
import org.junit.Test
import org.junit.runner.RunWith
import androidx.test.espresso.Espresso.onView
import androidx.test.espresso.matcher.ViewMatchers.*
import androidx.test.espresso.assertion.ViewAssertions.matches
import androidx.test.espresso.intent.rule.IntentsTestRule
import androidx.test.espresso.matcher.ViewMatchers.isDisplayed
import android.graphics.Color
import android.graphics.Typeface
import androidx.test.espresso.action.ViewActions.*
import com.github.tomakehurst.wiremock.core.WireMockConfiguration.wireMockConfig
import com.github.tomakehurst.wiremock.junit.WireMockRule

@RunWith(AndroidJUnit4::class)
class AddTraderActivityTest {

    @get:Rule
    var wireMockRule = WireMockRule(wireMockConfig().port(8081))

    @Test
    fun toolbarTitleTextViewText() {
        onView(withId(R.id.toolbaTitleTextView)).check(matches(withText(R.string.add_trader)))
    }

}

But I get error:

$ adb shell am instrument -w -r   -e debug false -e class 'com/myproject.android.activity.AddTraderActivityTest#toolbarTitleTextViewText' com/myproject.android.debug.test/androidx.test.runner.AndroidJUnitRunner
Client not ready yet..
Started running tests

java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/common/io/Resources;
at com.github.tomakehurst.wiremock.core.WireMockConfiguration.<init>(WireMockConfiguration.java:58)
at com.github.tomakehurst.wiremock.core.WireMockConfiguration.wireMockConfig(WireMockConfiguration.java:104)
at com/myproject.android.activity.AddTraderActivityTest.<init>(AddTraderActivityTest.kt:55)
at java.lang.reflect.Constructor.newInstance(Native Method)
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 androidx.test.runner.AndroidJUnit4.run(AndroidJUnit4.java:104)
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$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
at androidx.test.internal.runner.TestExecutor.execute(TestExecutor.java:56)
at androidx.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:389)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1879)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.common.io.Resources" on path: DexPathList[[zip file "/system/framework/android.test.runner.jar", zip file "/data/app/com/myproject.android.debug.test-2/base.apk", zip file "/data/app/com/myproject.android.debug-2/base.apk"],nativeLibraryDirectories=[/data/app/com/myproject.android.debug.test-2/lib/arm, /data/app/com/myproject.android.debug-2/lib/arm, /vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
... 30 more
Suppressed: java.lang.ClassNotFoundException: com.google.common.io.Resources
at java.lang.Class.classForName(Native Method)
at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
... 31 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available

facing the same issue. request you to post the solution if you got for this. — srv_sud, Apr 28 '20 at 03:25

SimpsOff · Answer 1 · 2021-02-24T15:45:54.590

What worked for me was removing the exclusion: exclude group: 'com.google.guava', module:'guava' from the wiremock dependency implementation in app/build.gradle.

I googled for where com.google.common.io.Resources was coming from, and it was guava, so if you aren't including guava from another one of your project includes, you have to remove the exclusion.

Alternatively, I belive you could also add implementation "com.google.guava:guava:30.1-android" to your Gradle file and it should also work (with the exclusion still in place).

score 1 · Answer 2 · answered Mar 09 '21 at 16:37

To explicitly use Wiremock in Espresso/Instrumented Tests, but exclude from unit tests (using Kotlin DSL)

androidTestApi("com.github.tomakehurst:wiremock:2.18.0") {
    exclude("org.apache.httpcomponents", "httpclient")
    exclude("org.ow2.asm", "asm")
    exclude("org.json", "json")
}
androidTestApi("org.apache.httpcomponents:httpclient-android:4.3.5.1")

Android:Espresso:WireMock java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/common/io/Resources;

2 Answers2