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.
- Companion:
- object
Value members
Concrete methods
Compares another object for equality.
Compares another object for equality.
If the passed object is a Span
, this method will return true
only if the other
Span
returns the exact same value as this Span
for totalNanos
.
- Value parameters:
- other
the object to compare with this one for equality
- Returns:
true if the other object is a
Span
with the sametotalNanos
value.- Definition Classes
- Any
Returns a hash code for this Span
.
Returns a hash code for this Span
.
- Returns:
a hash code based only on the
totalNanos
field.- Definition Classes
- Any
Returns a Span
representing this Span
scaled by the passed factor.
Returns a Span
representing this Span
scaled by the passed factor.
The passed factor
can be any positive number or zero, including fractional numbers. A number
greater than one will scale the Span
up to a larger value. A fractional number will scale it
down to a smaller value. A factor of 1.0 will cause the exact same Span
to be returned. A
factor of zero will cause Span.Zero
to be returned.
If overflow occurs, Span.Max
will be returned. If underflow occurs, Span.Zero
will be returned.
- Throws:
- IllegalArgumentException
if the passed value is less than zero
Returns a string that looks similar to a factory method call that would have produced this Span
.
Returns a string that looks similar to a factory method call that would have produced this Span
.
For example, for Span(1, Millisecond)
, this method would return "Span(1, Millisecond)"
.
For Span(9.99, Seconds)
, this method would return "Span(9.99, Seconds)"
.
- Returns:
a string that looks like a factory method call that would produce this
Span
- Definition Classes
- Any
Concrete fields
This time span converted to milliseconds, computed via totalNanos / 1000000
, which
truncates off any leftover nanoseconds.
This time span converted to milliseconds, computed via totalNanos / 1000000
, which
truncates off any leftover nanoseconds.
The millisPart
and nanosPart
can be used, for example, when invoking
Thread.sleep
. For example, given a Span
named span
, you could
write:
Thread.sleep(span.millisPart, span.nanosPart)
The number of nanoseconds remaining when this time span is converted to milliseconds, computed via
(totalNanos % 1000000).toInt
.
The number of nanoseconds remaining when this time span is converted to milliseconds, computed via
(totalNanos % 1000000).toInt
.
The millisPart
and nanosPart
can be used, for example, when invoking
Thread.sleep
. For example, given a Span
named span
, you could
write:
Thread.sleep(span.millisPart, span.nanosPart)
Returns a localized string suitable for presenting to a user that describes the time span represented
by this Span
.
Returns a localized string suitable for presenting to a user that describes the time span represented
by this Span
.
For example, for Span(1, Millisecond)
, this method would return "1 millisecond"
.
For Span(9.99, Seconds)
, this method would return "9.9 seconds"
.
- Returns:
a localized string describing this
Span