Coverage Summary for Class: DayPart (com.georgeci.moneysurfer.domain.model)

 package com.georgeci.moneysurfer.domain.model
 
 import kotlinx.datetime.TimeZone
 import kotlinx.datetime.toLocalDateTime
 import kotlin.time.Instant
 
 /**
  * Which greeting a screen opens with. A device-local reading of the wall clock and nothing else —
  * it takes no workspace, no account and no network, so it is the one line of the dashboard toolbar
  * that is always true.
  *
  * The part of day rather than the sentence: "Good evening" needs a locale no view model has, so the
  * screen picks its copy off this. Same split as the upcoming card's "Today"/"Tomorrow" labels.
  */
 enum class DayPart {
     Morning,
     Afternoon,
     Evening,
     Night,
     ;
 
     companion object {
 
         /**
          * The part of the day [instant] falls in, read in [timeZone].
          *
          * The boundaries are the conventional ones and deliberately not configurable: the greeting
          * is decoration, and someone up at 03:00 is better served by "Good night" than by a
          * setting. [Night] wraps midnight, so it is what the other three leave over rather than a
          * range of its own.
          */
         fun at(instant: Instant, timeZone: TimeZone): DayPart =
             when (instant.toLocalDateTime(timeZone).hour) {
                 in MORNING_FROM_HOUR until AFTERNOON_FROM_HOUR -> Morning
                 in AFTERNOON_FROM_HOUR until EVENING_FROM_HOUR -> Afternoon
                 in EVENING_FROM_HOUR until NIGHT_FROM_HOUR -> Evening
                 else -> Night
             }
     }
 }
 
 private const val MORNING_FROM_HOUR = 5
 private const val AFTERNOON_FROM_HOUR = 12
 private const val EVENING_FROM_HOUR = 17
 private const val NIGHT_FROM_HOUR = 22