Take a screenshot on Android Espresso Test Failure

This tutorial will show you how to add a test rule to your Espresso Android automation, when a test fails it takes a screenshot.

1. Create a new folder in androidTest/utility/screenshot
2. Add these two files EspressoScreenshot.kt and ScreenshotTestRule.kt to the folder (shown below).
3. Add write permission to Manifest, to save the screenshot file in the device.

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

4. Add the ScreenshoTestRule to your test.

5. Force one of your tests to fail, and run the test suite. Done, if one test fails you can check the Android device /sdcard/screenshots/ to see a screenshot of the device during the test failure.

Create the below files:

EspressoScreenshot.kt

package tunein.utility.screenshot

import android.util.Log
import androidx.test.runner.screenshot.Screenshot
import java.io.BufferedOutputStream
import java.io.File
import java.io.FileOutputStream
import java.io.IOException
import java.util.concurrent.atomic.AtomicInteger
import org.junit.runner.Description

/**
 * Used to automatically capture screenshots of failed tests.
 */
object EspressoScreenshot {
    private val imageCounter = AtomicInteger(0)
    private val dotPNG = ".png"
    private val underscore = "_"

    // Firebase Test Lab requires screenshots to be saved to /sdcard/screenshots
    //…