Pat Garrity
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80 lines
2.2 KiB
Scala
80 lines
2.2 KiB
Scala
package gs.test.v0
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import cats.effect.IO
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import cats.effect.unsafe.IORuntime
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import gs.timing.v0.ElapsedTime
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import gs.timing.v0.Timing
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import java.util.concurrent.TimeUnit
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import munit.*
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import scala.concurrent.duration.FiniteDuration
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class TimingTests extends FunSuite:
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given IORuntime = IORuntime.global
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iotest("should retrieve monotonic time") {
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for
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(provider, timing) <- Timing.manual[IO]
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t1 <- timing.monotonic()
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t2 <- timing.monotonic()
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_ <- provider.tick()
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t3 <- timing.monotonic()
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_ <- provider.tick()
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t4 <- timing.monotonic()
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_ <- provider.reset()
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t5 <- timing.monotonic()
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yield
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assertEquals(t1, 0L)
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assertEquals(t2, 0L)
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assertEquals(t3, 1L)
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assertEquals(t4, 2L)
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assertEquals(t5, 0L)
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}
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iotest("should create a timer based on the current provider") {
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val start = 0L
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val end = 1000000L * 2000L // 2 seconds, 2000 millis
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val nanos = end - start
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val millis = nanos / 1000000L
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val seconds = millis / 1000L
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for
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(provider, timing) <- Timing.manual[IO]
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timer <- timing.start()
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e1 <- timer.checkpoint()
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_ <- provider.set(end)
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e2 <- timer.checkpoint()
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yield
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assertEquals(
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e1,
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ElapsedTime(start, 0L, FiniteDuration(0L, TimeUnit.NANOSECONDS))
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)
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assertEquals(
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e2,
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ElapsedTime(start, end, FiniteDuration(nanos, TimeUnit.NANOSECONDS))
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)
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assertEquals(e2.toMilliseconds(), millis)
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assertEquals(e2.toSeconds(), seconds)
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}
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iotest("should capture system time") {
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for
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timing <- IO(Timing.system[IO])
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t1 <- timing.monotonic()
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_ <- IO.sleep(FiniteDuration(1L, TimeUnit.MILLISECONDS))
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t2 <- timing.monotonic()
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yield assert(
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t2 > t1,
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"The system clock should detect that at least 1 nanosecond has passed after sleeping for 1 millisecond."
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)
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}
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private def iotest(
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name: String
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)(
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body: => IO[Any]
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)(
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implicit
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loc: Location
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): Unit =
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test(name)(body.unsafeRunSync())
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