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How to use MutableClock class of io.kotest.extensions.time package

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

MutableClockTest.kt

Source:MutableClockTest.kt

1package com.sksamuel.kt.extensions.time2import io.kotest.core.spec.IsolationMode3import io.kotest.core.spec.style.StringSpec4import io.kotest.extensions.time.MutableClock5import io.kotest.matchers.shouldBe6import io.kotest.matchers.shouldNotBe7import 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"))...

MutableClock.kt

Source:MutableClock.kt

2import java.io.Serializable3import 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}...

MutableClock

Using AI Code Generation

1import io.kotest.core.spec.style.StringSpec2import io.kotest.extensions.time.MutableClock3import io.kotest.matchers.shouldBe4import java.time.Duration5import java.time.Instant6import java.time.ZoneId7class MutableClockTest : StringSpec({8    "MutableClock can be used to control time" {9        MutableClock().use { clock ->10            clock.instant() shouldBe Instant.EPOCH11            clock.millis() shouldBe 0L12            clock.zone shouldBe ZoneId.systemDefault()13            clock.setInstant(Instant.ofEpochSecond(1000))14            clock.instant() shouldBe Instant.ofEpochSecond(1000)15            clock.millis() shouldBe 1000L16            clock.zone shouldBe ZoneId.systemDefault()17            clock.setZone(ZoneId.of("UTC"))18            clock.instant() shouldBe Instant.ofEpochSecond(1000)19            clock.millis() shouldBe 1000L20            clock.zone shouldBe ZoneId.of("UTC")21            clock.plus(Duration.ofSeconds(1000))22            clock.instant() shouldBe Instant.ofEpochSecond(2000)23            clock.millis() shouldBe 2000L24            clock.zone shouldBe ZoneId.of("UTC")25        }26    }27})28import io.kotest.core.spec.style.StringSpec29import io.kotest.extensions.system.MutableSystemProperty30class MutableSystemPropertyTest : StringSpec({31    "MutableSystemProperty can be used to change a system property" {32        MutableSystemProperty("foo", "bar").use {33            System.getProperty("foo") shouldBe "bar"34        }35    }36})37import io.kotest.core.spec.style.StringSpec38import io.kotest.extensions.tempdir.TemporaryFolder39import java.io.File40class TemporaryFolderTest : StringSpec({41    "TemporaryFolder can be used to create a temporary folder" {42        TemporaryFolder().use { folder ->43            folder.create()44            folder.root.exists() shouldBe true45        }46    }47})

MutableClock

Using AI Code Generation

1+import io.kotest.core.spec.style.FunSpec2+import io.kotest.extensions.time.MutableClock3+import io.kotest.matchers.shouldBe4+import io.kotest.matchers.shouldNotBe5+import java.time.Duration6+import java.time.Instant7+class MutableClockTest : FunSpec({8+    test("MutableClock should be able to be used to simulate time") {9+        val clock = MutableClock()10+        clock.instant() shouldBe Instant.EPOCH11+        clock.instant() shouldNotBe Instant.now()12+        clock.plus(Duration.ofDays(1))13+        clock.instant() shouldBe Instant.EPOCH.plus(Duration.ofDays(1))14+    }15+})16-import io.kotest.core.spec.style.FunSpec17+import io.kotest.core.spec.style.StringSpec18 import io.kotest.matchers.shouldBe19 import io.kotest.matchers.shouldNotBe20 import java.time.Duration21@@ -7,7 +7,7 @@ import java.time.Instant22 import java.time.ZoneId23 class TimeTests : StringSpec({24-   "SystemTime should be able to be used to simulate time" {25+   "SystemTime should be able to be used to simulate time".config(enabled = false) {26       clock.instant() shouldBe Instant.EPOCH27       clock.instant() shouldNotBe Instant.now()

MutableClock

Using AI Code Generation

1+import io.kotest.extensions.time.MutableClock2+import io.kotest.extensions.time.mutableClock3+import io.kotest.matchers.shouldBe4+import io.kotest.core.spec.style.StringSpec5+class MutableClockTest : StringSpec({6+   "MutableClock should be able to freeze time" {7+      mutableClock.use {8+         this.freeze(Instant.now())9+         this.unfreeze()10+      }11+   }12+})

MutableClock

Using AI Code Generation

1import io.kotest.extensions.time.MutableClock2import io.kotest.matchers.shouldBe3import io.kotest.core.spec.style.StringSpec4import io.kotest.extensions.system.withSystemProperty5import io.kotest.matchers.shouldNotBe6import java.time.Clock7import java.time.ZoneId8class MutableClockTest : StringSpec({9   "MutableClock should be used by default" {10      Clock.systemUTC() shouldBe MutableClock()11   }12   "MutableClock should be used when using withSystemProperty" {13      withSystemProperty("kotest.clock", "mutable") {14         Clock.systemUTC() shouldBe MutableClock()15      }16   }17   "MutableClock should not be used when using withSystemProperty" {18      withSystemProperty("kotest.clock", "system") {19         Clock.systemUTC() shouldNotBe MutableClock()20      }21   }22   "MutableClock should be used when using withSystemProperty and should be mutable" {23      withSystemProperty("kotest.clock", "mutable") {24         MutableClock().apply {25            Clock.systemUTC() shouldBe this26            setZone(ZoneId.of("America/New_York"))27            Clock.systemUTC() shouldBe this28         }29      }30   }31})

MutableClock

Using AI Code Generation

1import io.kotest.extensions.time.MutableClock2import io.kotest.extensions.time.milliseconds3import io.kotest.extensions.time.seconds4import io.kotest.matchers.shouldBe5import kotlin.time.ExperimentalTime6class MutableClockTest : FunSpec({7   test("MutableClock should be able to advance time") {8      val clock = MutableClock()9      clock.advanceBy(1.seconds)10      clock.advanceBy(2.seconds)11   }12})

MutableClock

Using AI Code Generation

1+val clock = MutableClock()2+val clock = MutableClock()3+test("test case") {4+}5+test("test case") {6+   clock.setTime(1000L)7+}8+test("test case") {9+   clock.setTime(1000L)10+   time(clock) {11+   }12+}13+test("test case") {14+   clock.setTime(1000L)15+   time(clock) {16+      clock.setTime(2000L)17+   }18+}19+test("test case") {20+   clock.setTime(1000L)21+   time(clock) {22+      clock.setTime(2000L)23+      clock.setTime(3000L)24+   }25+}

MutableClock

Using AI Code Generation

1class MutableClockTest : FunSpec({2  test("test time") {3    MutableClock().use {4      it.setInstant(Instant.parse("2007-12-03T10:15:30.00Z"))5      println(Instant.now())6    }7  }8})9class MutableSystemTimeTest : FunSpec({10  test("test time") {11    MutableSystemTime().use {12      println(System.currentTimeMillis())13    }14  }15})16class MutableTimeZoneTest : FunSpec({17  test("test time") {18    MutableTimeZone().use {19      it.timeZone = TimeZone.getTimeZone("Asia/Calcutta")20      println(TimeZone.getDefault())21    }22  }23})24class SystemPropertiesTest : FunSpec({25  extensions(SystemProperties("foo" to "bar"))26  test("test") {27    println(System.getProperty("foo"))28  }29})30class EnvironmentVariablesTest : FunSpec({31  extensions(EnvironmentVariables("foo" to "bar"))32  test("test") {33    println(System.getenv("foo"))34  }35})36class TimeoutTest : FunSpec({37  extensions(Timeout(100))38  test("test") {39    Thread.sleep(200)40  }41})

MutableClock

Using AI Code Generation

1+test("MutableClock should be used in tests") {2+   MutableClock().use { clock ->3+   }4+}5+test("MutableClock should be used in tests") {6+   MutableClock().use { clock ->7+   }8+}9+test("MutableClock should be used in tests") {10+   MutableClock().use { clock ->11+   }12+}13+test("MutableClock should be used in tests") {14+   MutableClock().use { clock ->15+   }16+}17+test("MutableClock should be used in tests") {18+   MutableClock().use { clock ->19   }20+}21+test("MutableClock should be used in tests") {22+   MutableClock().use { clock ->23   }24+}25+test("MutableClock should be used in tests") {26+   MutableClock().use { clock ->27   }28+}29+test("MutableClock should be used in tests") {30+   MutableClock().use { clock ->31   }32+}33+test("MutableClock should be used in tests") {34+   MutableClock().use { clock ->35   }36+}37+test("MutableClock should be used in tests") {

MutableClock

Using AI Code Generation

1+class MutableClockTest : FunSpec() {2+   init {3+      test("MutableClock should be able to freeze time at a specific instant") {4+         MutableClock().freezeAt(Instant.parse("2020-05-22T10:15:30.00Z")) {5+            val instant = Instant.now()6+            instant shouldBe Instant.parse("2020-05-22T10:15:30.00Z")7+         }8+      }9+   }10+}11+* `freezeAt(instant: Instant, block: suspend () -> Unit)`12+* `freezeAt(instant: Instant, block: () -> Unit)`13+* `freezeAt(instant: Instant, block: suspend CoroutineScope.() -> Unit)`14+* `freezeAt(instant: Instant, block: CoroutineScope.() -> Unit)`15+* `freezeAt(instant: Instant, block: suspend TestContext.() -> Unit)`16+* `freezeAt(instant: Instant, block: TestContext.() -> Unit)`17+* `freezeAt(instant: Instant, block: suspend MutableClock.() -> Unit)`18+* `freezeAt(instant: Instant, block: MutableClock.() -> Unit)`19+* `freezeAt(instant: Instant, block: suspend TestContext.() -> Unit)`20+* `freezeAt(instant: Instant, block: TestContext.() -> Unit)`21+* `suspend fun TestContext.freezeAt(instant: Instant, block: suspend MutableClock.() -> Unit)`22+* `fun TestContext.freezeAt(instant: Instant, block: MutableClock.() -> Unit)`23+* `suspend fun TestContext.freezeAt(instant: Instant, block: suspend MutableClock.() -> Unit)`24+* `fun TestContext.freezeAt(instant

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