Son bir hata daha kaldı bu hatayı nasıl çözerim sizce
Gradle DSL method not found: 'testImplementation()'
Possible causes:<ul><li>The project 'HDWallpaper' may be using a version of Gradle that does not contain the method.
Open Gradle wrapper file</li><li>The build file may be missing a Gradle plugin.
Apply Gradle plugin</li>