Pin the clock in the delete-following subtree test (#65)

Reviewed-on: https://codeberg.org/jlmakiola/agendula/pulls/65

app/src/androidTest/java/de/jeanlucmakiola/agendula/data/tasks/room/RoomTasksDataSourceTest.kt

@@ -570,13 +570,14 @@ class RoomTasksDataSourceTest {
 
     @Test
     fun deletingFollowingFromTheFirstOccurrenceTakesTheWholeSubtree() {
+        val start = now
         val series = db.tasks().insert(
-            TaskEntity(listId = listId, uid = "s", title = "s", dtstart = now, rrule = "FREQ=DAILY;COUNT=3"),
+            TaskEntity(listId = listId, uid = "s", title = "s", dtstart = start, rrule = "FREQ=DAILY;COUNT=3"),
         )
         val child = source.insertTask(form("child").copy(parentId = series))
         val grandchild = source.insertTask(form("grandchild").copy(parentId = child))
 
-        source.deleteFollowing(series, now)
+        source.deleteFollowing(series, start)
 
         assertThat(listOf(series, child, grandchild).mapNotNull { db.tasks().entity(it) }).isEmpty()
     }