CODEWITHSUNDEEP
androidunit-testingkotlin
Crash1hd
Crash1hd

Reputation: 673

Kotlin android app ExampleInstrumentedTest not working

Created a new Kotlin android app using Android Studio and trying to run the example instrumentation test as follows... with the gradle file below and its erroring? Not sure how to resolve. I tried changing the context to val context: Context = ApplicationProvider.getApplicationContext() but that just gives a different error (similar error but different one.

package com.mycomp.myprog

import androidx.test.ext.junit.runners.AndroidJUnit4
import androidx.test.platform.app.InstrumentationRegistry
import org.junit.Test
import org.junit.runner.RunWith

import org.junit.Assert.*

/**
 * Instrumented test, which will execute on an Android device.
 *
 * See [testing documentation](http://d.android.com/tools/testing).
 */
@RunWith(AndroidJUnit4::class)
class ExampleInstrumentedTest {
    @Test
    fun useAppContext() {
        // Context of the app under test.
        val appContext = InstrumentationRegistry.getInstrumentation().context
        assertEquals("com.mycomp.myprog", appContext.packageName)
    }
}

I get the following error

org.junit.ComparisonFailure: expected:<com.mycomp.myprog[]> but was:<com.mycomp.myprog[.test]>
at org.junit.Assert.assertEquals(Assert.java:115)
at org.junit.Assert.assertEquals(Assert.java:144)
...

with the following gradle

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.mycomp.myprog"
        minSdkVersion 16
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'androidx.appcompat:appcompat:1.1.0-alpha03'
    implementation 'androidx.core:core-ktx:1.1.0-alpha05'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    //testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.1.2-alpha02'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0-alpha02'

    androidTestImplementation 'androidx.test.ext:junit:1.1.0'
    androidTestImplementation 'androidx.test:core:1.1.1-alpha02'

    // JUnit-4 framework (See vintage below)
    testImplementation 'junit:junit:4.12'
    testImplementation 'org.jetbrains.kotlin:kotlin-test-junit:1.3.20'

    // JUnit-5 Jupiter
    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.4.0'
    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.4.0'

    // JUnit-5 (Vintage give access to JUnit-4)
    testImplementation "junit:junit:4.12"
    testRuntimeOnly 'org.junit.vintage:junit-vintage-engine:5.4.0'
}

Upvotes: 2

Views: 1640

Answers (1)

Fred
Fred

Reputation: 17085

InstrumentationRegistry.getInstrumentation().context is the context of the instrumentation app. From your assert you want the context of the target instrumentation, which is val appContext = InstrumentationRegistry.getInstrumentation().targetContext

Upvotes: 4

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