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How to use instant method of io.kotest.extensions.time.MutableClock class

Best Kotest code snippet using io.kotest.extensions.time.MutableClock.instant

MutableClockTest.kt

Source:MutableClockTest.kt

...7import java.time.Instant8import java.time.ZoneId9class MutableClockTest : StringSpec() {10   private val zoneId = ZoneId.of("Europe/Warsaw")11   private val instantNow = Instant.now()12   private val clock = MutableClock(instantNow, zoneId)13   init {14      isolationMode = IsolationMode.InstancePerLeaf15      "Set instant for the future" {16         val modifiedClock = clock.withInstant(instantNow.plusSeconds(123))17         modifiedClock.zone shouldBe zoneId18         modifiedClock.millis() shouldNotBe instantNow.toEpochMilli()19      }20      "Set instant for the past" {21         val modifiedClock = clock.withInstant(instantNow.minusSeconds(123))22         modifiedClock.zone shouldBe zoneId23         modifiedClock.millis() shouldNotBe instantNow.toEpochMilli()24      }25      "Change time zone" {26         val modifiedClock = clock.withZone(ZoneId.of("Europe/Paris"))27         modifiedClock.zone shouldNotBe zoneId28         modifiedClock.millis() shouldBe instantNow.toEpochMilli()29      }30   }31}...

MutableClock.kt

Source:MutableClock.kt

...3import java.time.Clock4import java.time.Instant5import java.time.ZoneId6class MutableClock(7   private var instant: Instant,8   private var zone: ZoneId,9) : Clock(), Serializable {10   fun withInstant(instant: Instant): Clock = apply { this.instant = instant }11   override fun withZone(zone: ZoneId): Clock = apply { this.zone = zone }12   override fun getZone(): ZoneId = zone13   override fun instant(): Instant = instant14   override fun millis(): Long = instant.toEpochMilli()15   override fun equals(other: Any?): Boolean {16      if (other == null || other !is MutableClock) return false17      return instant == other.instant && zone == other.zone18   }19   override fun hashCode(): Int = instant.hashCode().xor(zone.hashCode())20   override fun toString(): String = "MutableClock[$instant,$zone]"21}...

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