Packages

package time

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Type Members

  1. trait Now extends AnyRef

    Trait providing a now method that returns the current time in milliseconds since January 1, 1970, 00:00:00 GMT.

  2. final class Span extends Serializable

    A time span.

    A time span.

    A Span is used to express time spans in ScalaTest, in constructs such as the failAfter method of trait Timeouts, the timeLimit field of trait TimeLimitedTests, and the timeouts of traits Eventually, and AsyncAssertions. Here's an example:

    import org.scalatest.time.Span
import org.scalatest.time.Millis
import org.scalatest.concurrent.Timeouts._

failAfter(Span(100, Millis)) {
  // ...
}

    If you prefer you can mix in or import the members of SpanSugar and place a units value after the timeout value. Here are some examples:

    import org.scalatest.time.SpanSugar._
import org.scalatest.concurrent.Timeouts._

failAfter(100 millis) {
  // ...
}

failAfter(1 second) {
  // ...
}

    In addition to expression the numeric value with an Int or a Long, you can also express it via a Float or Double. Here are some examples:

    import org.scalatest.time.Span
import org.scalatest.time.Seconds
import org.scalatest.concurrent.Timeouts._

failAfter(Span(1.5, Seconds)) {
  // ...
}

import org.scalatest.time.SpanSugar._

failAfter(0.8 seconds) {
  // ...
}

    Internally, a Span is expressed in terms of a Long number of nanoseconds. Thus, the maximum time span that can be represented is Long.MaxValue nanoseconds, or approximately 292 years. Hopefully these won't be "famous last words," but 292 years should be sufficient for software testing purposes. Any attempt to create a Span longer than Long.MaxValue nanoseconds will be met with an IllegalArgumentException:

    Span(Long.MaxValue, Nanoseconds) // Produces the longest possible time.Span
Span(Long.MaxValue, Seconds)     // Produces an IllegalArgumentException

    All of class Span's constructors are private. The only way you can create a new Span is via one of the two apply factory methods in Span's companion object. Here is a table showing one example of each numeric type and unit value:

    Int Long Float Double
    Span(1, Nanosecond) Span(1L, Nanosecond) Span(1.0F, Nanosecond) Span(1.0, Nanosecond)
    Span(100, Nanoseconds) Span(100L, Nanoseconds) Span(99.8F, Nanoseconds) Span(99.8, Nanoseconds)
    Span(1, Microsecond) Span(1L, Microsecond) Span(1.0F, Microsecond) Span(1.0, Microsecond)
    Span(100, Microseconds) Span(100L, Microseconds) Span(99.8F, Microseconds) Span(99.8, Microseconds)
    Span(1, Millisecond) Span(1L, Millisecond) Span(1.0F, Millisecond) Span(1.0, Millisecond)
    Span(100, Milliseconds) Span(100L, Milliseconds) Span(99.8F, Milliseconds) Span(99.8, Milliseconds)
    Span(100, Millis) Span(100L, Millis) Span(99.8F, Millis) Span(99.8, Millis)
    Span(1, Second) Span(1L, Second) Span(1.0F, Second) Span(1.0, Second)
    Span(100, Seconds) Span(100L, Seconds) Span(99.8F, Seconds) Span(99.8, Seconds)
    Span(1, Minute) Span(1L, Minute) Span(1.0F, Minute) Span(1.0, Minute)
    Span(100, Minutes) Span(100L, Minutes) Span(99.8F, Minutes) Span(99.8, Minutes)
    Span(1, Hour) Span(1L, Hour) Span(1.0F, Hour) Span(1.0, Hour)
    Span(100, Hours) Span(100L, Hours) Span(99.8F, Hours) Span(99.8, Hours)
    Span(1, Day) Span(1L, Day) Span(1.0F, Day) Span(1.0, Day)
    Span(100, Days) Span(100L, Days) Span(99.8F, Days) Span(99.8, Days)

    Note that because of implicit conversions in the Span companion object, you can use a scala.concurrent.duration.Duration where a Span is needed, and vice versa.

  3. trait SpanSugar extends AnyRef

    Trait providing four implicit conversions that allow you to specify spans of time by invoking "units" methods such as millis, seconds, and minutes on Int, Long, Float, and Double.

    Trait providing four implicit conversions that allow you to specify spans of time by invoking "units" methods such as millis, seconds, and minutes on Int, Long, Float, and Double.

    This trait enables you to specify a span of time in a clear, boilerplate-free way when you need to provide an instance of Span. This can be used, for example, with the failAfter method of trait Timeouts or the timeLimit field of trait TimeLimitedTests. It can also be used to specify timeouts when using traits Eventually, Futures, Waiter. Here are examples of each unit enabled by this trait:

    Int Long Float Double
    1 nanosecond 1L nanosecond 1.0F nanosecond 1.0 nanosecond
    100 nanoseconds 100L nanoseconds 99.8F nanoseconds 99.8 nanoseconds
    1 microsecond 1L microsecond 1.0F microsecond 1.0 microsecond
    100 microseconds 100L microseconds 99.8F microseconds 99.8 microseconds
    1 millisecond 1L millisecond 1.0F millisecond 1.0 millisecond
    100 milliseconds 100L milliseconds 99.8F milliseconds 99.8 milliseconds
    100 millis 100L millis 99.8F millis 99.8 millis
    1 second 1L second 1.0F second 1.0 second
    100 seconds 100L seconds 99.8F seconds 99.8 seconds
    1 minute 1L minute 1.0F minute 1.0 minute
    100 minutes 100L minutes 99.8F minutes 99.8 minutes
    1 hour 1L hour 1.0F hour 1.0 hour
    100 hours 100L hours 99.8F hours 99.8 hours
    1 day 1L day 1.0F day 1.0 day
    100 days 100L days 99.8F days 99.8 days

    This trait is not the default way to specify Spans for two reasons. First, it adds four implicits, which would give the compiler more work to do and may conflict with other implicits the user has in scope. Instead, Span provides a clear, concise default way to specify time spans that requires no implicits. Here's an example:

    Span(1, Second)

    If you already have implicit conversions in scope that provide a similar syntax sugar for expression time spans, you can use that by providing an implicit conversion from the result of those expressions to Span. Note that because of implicit conversions in the Span companion object, you can use a scala.concurrent.duration.Duration (including in its "sugary" form) where a Span is needed, and vice versa.

  4. sealed abstract class Units extends Product with Serializable

    Defines a family of singleton objects representing units of time.

    Defines a family of singleton objects representing units of time.

    The singleton objects that extend this abstract class may be passed to the constructor of Span to specify units of time. For example:

    Span(1, Second)

Value Members

  1. object Day extends Units with Product with Serializable

    Indicates units for a single day.

    Indicates units for a single day.

    This singleton object may be passed to the constructor of Span to specify day units of time, so long as the value passed to Span is 1. For example:

    Span(1, Day)

  2. object Days extends Units with Product with Serializable

    Indicates day units.

    Indicates day units.

    This singleton object may be passed to the constructor of Span to specify day units of time. For example:

    Span(10, Days)

  3. object Hour extends Units with Product with Serializable

    Indicates units for a single hour.

    Indicates units for a single hour.

    This singleton object may be passed to the constructor of Span to specify hour units of time, so long as the value passed to Span is 1. For example:

    Span(1, Hour)

  4. object Hours extends Units with Product with Serializable

    Indicates hour units.

    Indicates hour units.

    This singleton object may be passed to the constructor of Span to specify hour units of time. For example:

    Span(10, Hours)

  5. object Microsecond extends Units with Product with Serializable

    Indicates units for a single microsecond.

    Indicates units for a single microsecond.

    This singleton object may be passed to the constructor of Span to specify microsecond units of time, so long as the value passed to Span is 1. For example:

    Span(1, Microsecond)

  6. object Microseconds extends Units with Product with Serializable

    Indicates microsecond units.

    Indicates microsecond units.

    This singleton object may be passed to the constructor of Span to specify microsecond units of time. For example:

    Span(10, Microseconds)

  7. object Millis extends Units with Product with Serializable

    Indicates millisecond units (shorthand form).

    Indicates millisecond units (shorthand form).

    This singleton object may be passed to the constructor of Span to specify millisecond units of time. For example:

    Span(10, Millis)

    Note: Millis is merely a shorthand for Milliseconds. When passed to Span, Millis means exactly the same thing as Milliseconds.

  8. object Millisecond extends Units with Product with Serializable

    Indicates units for a single millisecond.

    Indicates units for a single millisecond.

    This singleton object may be passed to the constructor of Span to specify millisecond units of time, so long as the value passed to Span is 1. For example:

    Span(1, Millisecond)

  9. object Milliseconds extends Units with Product with Serializable

    Indicates millisecond units.

    Indicates millisecond units.

    This singleton object may be passed to the constructor of Span to specify millisecond units of time. For example:

    Span(10, Milliseconds)

  10. object Minute extends Units with Product with Serializable

    Indicates units for a single minute.

    Indicates units for a single minute.

    This singleton object may be passed to the constructor of Span to specify minute units of time, so long as the value passed to Span is 1. For example:

    Span(1, Minute)

  11. object Minutes extends Units with Product with Serializable

    Indicates minute units.

    Indicates minute units.

    This singleton object may be passed to the constructor of Span to specify minute units of time. For example:

    Span(10, Minutes)

  12. object Nanosecond extends Units with Product with Serializable

    Indicates units for a single nanosecond.

    Indicates units for a single nanosecond.

    This singleton object may be passed to the constructor of Span to specify nanosecond units of time, so long as the value passed to Span is 1. For example:

    Span(1, Nanosecond)

  13. object Nanoseconds extends Units with Product with Serializable

    Indicates nanosecond units.

    Indicates nanosecond units.

    This singleton object may be passed to the constructor of Span to specify nanosecond units of time. For example:

    Span(10, Nanoseconds)

  14. object Now extends Now

    Companion object to trait Now that enables its members to be imported as an alternative to mixing them in.

  15. object Second extends Units with Product with Serializable

    Indicates units for a single second.

    Indicates units for a single second.

    This singleton object may be passed to the constructor of Span to specify second units of time, so long as the value passed to Span is 1. For example:

    Span(1, Second)

  16. object Seconds extends Units with Product with Serializable

    Indicates second units.

    Indicates second units.

    This singleton object may be passed to the constructor of Span to specify second units of time. For example:

    Span(10, Seconds)

  17. object Span extends Serializable

    Companion object for Span that provides two factory methods for creating Span instances.

    Companion object for Span that provides two factory methods for creating Span instances.

    The first argument to each factory method is a numeric value; the second argument is a Units value. One factory method takes a Long, so it can be invoked with either an Int or Long, as in:

    import org.scalatest.time._

Span(1, Second)
Span(1L, Millisecond)

    The other factory method takes a Double, so it can be invoked with either a Float or a Double:

    import org.scalatest.time._

Span(2.5F, Seconds)
Span(99.9, Microseconds)

  18. object SpanSugar extends SpanSugar

    Companion object that facilitates the importing of SpanSugar members as an alternative to mixing it in.

    Companion object that facilitates the importing of SpanSugar members as an alternative to mixing it in. One use case is to import SpanSugar members so you can use them in the Scala interpreter:

    $scala -classpath scalatest.jar
Welcome to Scala version 2.9.1.final (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_29).
Type in expressions to have them evaluated.
Type :help for more information.

scala> import org.scalatest._
import org.scalatest._

scala> import concurrent.Eventually._
import org.scalatest.concurrent.Eventually._

scala> import time.SpanSugar._
import org.scalatest.time.SpanSugar._

scala> eventually(timeout(100 millis)) { 1 + 1 should equal (3) }

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