Add missing test.

libraries/push/impl/src/test/kotlin/io/element/android/libraries/push/impl/notifications/factories/DefaultNotificationCreatorTest.kt

@@ -63,6 +63,21 @@ class DefaultNotificationCreatorTest {
         )
     }
 
+    @Test
+    fun `test createUnregistrationNotification`() {
+        val sut = createNotificationCreator()
+        val matrixUser = aMatrixUser()
+        val result = sut.createUnregistrationNotification(
+            notificationAccountParams = aNotificationAccountParams(
+                user = matrixUser,
+            ),
+        )
+        result.commonAssertions(
+            expectedGroup = matrixUser.userId.value,
+            expectedCategory = NotificationCompat.CATEGORY_ERROR,
+        )
+    }
+
     @Test
     fun `test createFallbackNotification`() {
         val sut = createNotificationCreator()