Android unit test not mocked
AndroidUnit TestingJunitAndroid Problem Overview
I followed this guide https://sites.google.com/a/android.com/tools/tech-docs/unit-testing-support but i am stuck with this error:
junit.framework.AssertionFailedError: Exception in constructor: testSaveJson (java.lang.RuntimeException: Method put in org.json.JSONObject not mocked. See https://sites.google.com/a/android.com/tools/tech-docs/unit-testing-support for details.
I modified by Gradle build like the guide says but it doesn't make a difference
testOptions {
unitTests.returnDefaultValues = true
}
Android Solutions
Solution 1 - Android
JSON is bundled up with the Android SDK, so you'll just be hitting a stub. You can pull in a JSON jar, which will provide real objects to use.
To do this, you'll need to add this to your build.gradle:
testImplementation 'org.json:json:20140107'
Alternatively, you can download and include the jar.
testCompile files('libs/json.jar')
Note that the latest version of JSON is built for Java 8, so you'll need to grab 20140107 You may also need to clean and rebuild the project.
Solution 2 - Android
I think you trying to run tests with org.json.JSONObject
which is part of Android Framework
on pure jUnit
.
From docs:
> The android.jar file that is used to run unit tests does not contain any actual code - that is provided by the Android system image on real devices. Instead, all methods throw exceptions (by default). > > We are aware that the default behavior is problematic when using classes like Log or TextUtils and will evaluate possible solutions in future releases.
You need to emulate Android environment you can use for this purpose Robolectric or InstrumentationTests
Solution 3 - Android
You need to add the following to the build.gradle:
android {
// ...
testOptions {
unitTests.returnDefaultValues = true
}
}
and
dependencies {
//...
testImplementation 'org.json:json:20180813'
}
Solution 4 - Android
Solution for the problem in if you're using Kotlin DSL:
testOptions {
unitTests.isReturnDefaultValues = true
}
testImplementation("org.json:json:20210307")
Solution 5 - Android
android {
testOptions {
unitTests.returnDefaultValues = true
} }
dependencies {
testImplementation libs.leakCanaryNoOp
testImplementation tests.jUnit
testImplementation tests.mockito
testImplementation(tests.mokitoKotlin) {
exclude group: "org.jetbrains.kotlin", module: "kotlin-stdlib"
exclude group: "org.jetbrains.kotlin", module: "kotlin-runtime"
exclude group: "org.jetbrains.kotlin", module: "kotlin-reflect"
exclude group: "org.mockito", module: "mockito-core"
}
testImplementation tests.powerMock
testImplementation tests.powerMockApiMockito
testImplementation (tests.robolectric) {
exclude group: 'org.robolectric', module: 'robolectric-resources:'
}
testImplementation (tests.robolectricShadowsSupport){
exclude group: 'org.robolectric', module: 'robolectric'
}
kaptTest libs.daggerCompiler
}