No tests found when using ANDROIDX_TEST_ORCHESTRATOR

Troubleshooting “No Tests Found” with ANDROIDX_TEST_ORCHESTRATOR

Encountering the “No tests found” error when using ANDROIDX_TEST_ORCHESTRATOR in your Android testing setup can be frustrating. This guide provides common causes and solutions for this issue, enabling you to successfully execute your instrumented tests.

1. Test Package Configuration

Ensure your test package is correctly configured and referenced within your app’s build.gradle file:

android {
    ...
    defaultConfig {
        ...
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    // Add test options here for configuring orchestrator
    testOptions {
        unitTests.includeAndroidResources = true // Include resources for UI testing
    }
}

dependencies {
    // Add your test dependencies, including androidx.test.ext:junit:1.1.5 
    androidTestImplementation "androidx.test.ext:junit:1.1.5"
    androidTestImplementation "androidx.test.espresso:espresso-core:3.5.1"
    androidTestImplementation("androidx.test.orchestrator:orchestrator:1.4.1")
}

2. Test Class and Method Setup

Your test classes and methods must follow the correct conventions for discovery by the orchestrator:

• Test classes must be public and annotated with @RunWith(AndroidJUnit4.class).
• Test methods must be public, void, and annotated with @Test.

// Example test class:
import org.junit.runner.RunWith;
import org.junit.Test;
import androidx.test.ext.junit.runners.AndroidJUnit4;

@RunWith(AndroidJUnit4.class)
public class MyTestClass {
    @Test
    public void testSomething() {
        // ... your test logic here
    }
}

3. Instrumentation Target Package

Verify that the instrumentation target package in your test manifest (AndroidManifest.xml) matches your application’s package name:

4. Test Exclusion

Ensure you haven’t inadvertently excluded your tests from the execution using the include and exclude options within testOptions in your build.gradle file.

5. Clean Build and Rebuild

Sometimes, a clean build can resolve issues related to test discovery:

• Go to the ‘Build’ menu in Android Studio.
• Select ‘Clean Project’.
• Rebuild your project (Build > Rebuild Project).

6. IDE Configuration

Ensure your IDE (Android Studio) is correctly configured for testing.

• Navigate to “Run > Edit Configurations…”.
• Verify the test configuration is selected (usually “app > Instrumentation Tests”).
• Confirm that “Use instrumentation runner: ANDROIDX_TEST_ORCHESTRATOR” is checked.
• If available, set the “Instrumentation target package” to your app’s package name.

7. Orchestrator Setup

Double-check your orchestrator configuration. Ensure that:

• The androidx.test.orchestrator:orchestrator dependency is included in your build.gradle file.
• You have enabled test orchestration within testOptions.
• You are running your tests using the instrumentation runner: AndroidJUnitRunner.

Comparison Table

Example: Using ANDROIDX_TEST_ORCHESTRATOR

Here is an example of using ANDROIDX_TEST_ORCHESTRATOR in your build.gradle file:

android {
    ...
    defaultConfig {
        ...
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    testOptions {
        unitTests.includeAndroidResources = true
        execution 'ANDROIDX_TEST_ORCHESTRATOR'
    }
}

dependencies {
    ...
    androidTestImplementation "androidx.test.ext:junit:1.1.5"
    androidTestImplementation "androidx.test.espresso:espresso-core:3.5.1"
    androidTestImplementation("androidx.test.orchestrator:orchestrator:1.4.1")
}

In this example, execution 'ANDROIDX_TEST_ORCHESTRATOR' tells Gradle to use the orchestrator for running tests. The androidx.test.orchestrator:orchestrator dependency is included, allowing you to leverage the orchestrator’s features.

By following these steps and troubleshooting tips, you should be able to resolve the “No tests found” issue and successfully execute your instrumented tests using ANDROIDX_TEST_ORCHESTRATOR.