trait Disk extends Annotation
Annotation used to tag a test, or suite of tests, as being disk-intensive (i.e., consuming a large amount of disk-IO bandwidth when it runs).
Note: This is actually an annotation defined in Java, not a Scala trait. It must be defined in Java instead of Scala so it will be accessible at runtime. It has been inserted into Scaladoc by pretending it is a trait.
If you wish to mark an entire suite of tests as being disk-intensive, you can annotate the test class with @Disk
, like this:
package org.scalatest.examples.flatspec.diskall import org.scalatest._ import tags.Disk @Disk class SetSpec extends FlatSpec { "An empty Set" should "have size 0" in { assert(Set.empty.size === 0) } it should "produce NoSuchElementException when head is invoked" in { intercept[NoSuchElementException] { Set.empty.head } } }
When you mark a test class with a tag annotation, ScalaTest will mark each test defined in that class with that tag.
Thus, marking the SetSpec
in the above example with the @Disk
tag annotation means that both tests
in the class are disk-intensive.
Another use case for @Disk
is to mark test methods as disk-intensive in traits Spec
and fixture.Spec
. Here's an example:
package org.scalatest.examples.spec.disk import org.scalatest._ import tags.Disk class SetSpec extends RefSpec { @Disk def `an empty Set should have size 0` { assert(Set.empty.size === 0) } def `invoking head on an empty Set should produce NoSuchElementException` { intercept[NoSuchElementException] { Set.empty.head } } }
The main use case of annotating a test or suite of tests is to select or deselect them during runs by supplying tags to include and/or exclude. For more information,
see the relevant section in the documentation of object Runner
.
Note that because reflection is not supported on Scala.js, this annotation will only work on the JVM, not on Scala.js.
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