org.scalatest.exceptions.PayloadField.scala Maven / Gradle / Ivy
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/*
* Copyright 2001-2012 Artima, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.scalatest.exceptions
/**
* Trait implemented by exception types that carry an optional payload.
*
*
* Many ScalaTest events include an optional "payload" field that can be used
* to pass information to a custom reporter. This trait facilitates such customization,
* by allowing test code to include a payload in an exception (such as TestFailedException).
* ScalaTest looks for this trait and fires any payloads it finds in the relevant ScalaTest event
* stimulated by the exception, such as a TestFailed event stimulated by a TestFailedException.
* (Although in its initial
* release there is only one subclass of PayloadField in ScalaTest,
* TestFailedException,
* in a future version of ScalaTest, there will be another....)
*
*
*
* For an example of how payloads could be used, see the documentation for trait Payloads.
*
*
* @author Bill Venners
*/
trait PayloadField { this: Throwable =>
/**
* The optional payload.
*/
val payload: Option[Any]
}