Introduce simulateLongTask to ensure that the Presenter State Loading is visible.

Also do some cleanup on the tests.

libraries/mediaupload/test/build.gradle.kts

@@ -24,4 +24,5 @@ android {
 
 dependencies {
     api(projects.libraries.mediaupload.api)
+    implementation(projects.tests.testutils)
 }

libraries/mediaupload/test/src/main/kotlin/io/element/android/libraries/mediaupload/test/FakeMediaPreProcessor.kt

@@ -20,6 +20,7 @@ import android.net.Uri
 import io.element.android.libraries.matrix.api.media.FileInfo
 import io.element.android.libraries.mediaupload.api.MediaPreProcessor
 import io.element.android.libraries.mediaupload.api.MediaUploadInfo
+import io.element.android.tests.testutils.simulateLongTask
 import java.io.File
 
 class FakeMediaPreProcessor : MediaPreProcessor {
@@ -41,7 +42,9 @@ class FakeMediaPreProcessor : MediaPreProcessor {
         mimeType: String,
         deleteOriginal: Boolean,
         compressIfPossible: Boolean
-    ): Result<MediaUploadInfo> = result
+    ): Result<MediaUploadInfo> = simulateLongTask {
+        result
+    }
 
     fun givenResult(value: Result<MediaUploadInfo>) {
         this.result = value