org.scalatest.junit.JUnitTestFailedError.scala Maven / Gradle / Ivy
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/*
* Copyright 2001-2009 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.junit
import _root_.junit.framework.AssertionFailedError
import org.scalatest.exceptions.{PayloadField, ModifiablePayload, StackDepth, ModifiableMessage}
/**
* Exception that indicates a test failed.
*
*
* The purpose of this exception is to encapsulate the same stack depth information provided by
* TestFailedException, which is used
* when running with ScalaTest, but be reported as
* a failure not an error when running with JUnit.
* The stack depth information indicates which line of test code failed, so that when running
* with ScalaTest information can be presented to
* the user that makes it quick to find the failing line of test code. (In other words, when
* running with ScalaTest the user need not scan through the stack trace to find the correct filename
* and line number of the failing test.)
*
*
*
* JUnit distinguishes between failures and errors.
* If a test fails because of a failed assertion, that is considered a failure in JUnit. If a test
* fails for any other reason, either the test code or the application being tested threw an unexpected
* exception, that is considered an error in JUnit. This class differs from
* TestFailedException in that it extends
* junit.framework.AssertionFailedError. Instances of this class are thrown by the
* assertions provided by AssertionsForJUnit, and matcher
* expressions provided by ShouldMatchersForJUnit, and
* MustMatchersForJUnit.
*
*
*
* The way JUnit 3 (JUnit 3.8 and earlier releases) decided whether an exception represented a failure or error
* is that only thrown junit.framework.AssertionFailedErrors were considered failures. Any other
* exception type was considered an error. The exception type thrown by the JUnit 3 assertion methods declared
* in junit.framework.Assert (such as assertEquals, assertTrue,
* and fail) was, therefore, AssertionFailedError. In JUnit 4, AssertionFailedError
* was made to extend java.lang.AssertionError, and the distinction between failures and errors
* was essentially dropped. However, some tools that integrate with JUnit carry on this distinction, so even
* if you are using JUnit 4 you may want to use the "ForJUnit" of ScalaTest assertions and matchers.
*
*
* @param message an optional detail message for this TestFailedException.
* @param cause an optional cause, the Throwable that caused this TestFailedException to be thrown.
* @param failedCodeStackDepth the depth in the stack trace of this exception at which the line of test code that failed resides.
*
* @throws NullPointerException if either message or cause is null, or Some(null).
*
* @author Bill Venners
*/
class JUnitTestFailedError(val message: Option[String], val cause: Option[Throwable], val failedCodeStackDepth: Int, val payload: Option[Any])
extends AssertionFailedError(if (message.isDefined) message.get else "") with StackDepth with ModifiableMessage[JUnitTestFailedError] with PayloadField with ModifiablePayload[JUnitTestFailedError] {
/**
* This constructor has been deprecated and will be removed in a future version of ScalaTest. Please
* use the primary constructor instead.
*/
@deprecated("Please use the primary constructor instead.")
def this(message: Option[String], cause: Option[Throwable], failedCodeStackDepth: Int) =
this(message, cause, failedCodeStackDepth, None)
// TODO: CHange above to a message.getOrElse(""), and same in other exceptions most likely
// TODO: Possibly change stack depth to stackDepthFun like in TFE, consider messageFun like in TDE
if (message == null) throw new NullPointerException("message was null")
message match {
case Some(null) => throw new NullPointerException("message was a Some(null)")
case _ =>
}
if (cause == null) throw new NullPointerException("cause was null")
cause match {
case Some(null) => throw new NullPointerException("cause was a Some(null)")
case _ =>
}
if (cause.isDefined)
super.initCause(cause.get)
/*
* Throws IllegalStateException, because StackDepthExceptions are
* always initialized with a cause passed to the constructor of superclass
*/
override final def initCause(throwable: Throwable): Throwable = { throw new IllegalStateException }
/**
* Create a JUnitTestFailedError with specified stack depth and no detail message or cause.
*
* @param failedCodeStackDepth the depth in the stack trace of this exception at which the line of test code that failed resides.
*
*/
def this(failedCodeStackDepth: Int) = this(None, None, failedCodeStackDepth, None)
/**
* Create a JUnitTestFailedError with a specified stack depth and detail message.
*
* @param message A detail message for this JUnitTestFailedError.
* @param failedCodeStackDepth the depth in the stack trace of this exception at which the line of test code that failed resides.
*
* @throws NullPointerException if message is null.
*/
def this(message: String, failedCodeStackDepth: Int) =
this(
{
if (message == null) throw new NullPointerException("message was null")
Some(message)
},
None,
failedCodeStackDepth,
None
)
/**
* Create a JUnitTestFailedError with the specified stack depth and cause. The
* message field of this exception object will be initialized to
* if (cause.getMessage == null) "" else cause.getMessage.
*
* @param cause the cause, the Throwable that caused this JUnitTestFailedError to be thrown.
* @param failedCodeStackDepth the depth in the stack trace of this exception at which the line of test code that failed resides.
*
* @throws NullPointerException if cause is null.
*/
def this(cause: Throwable, failedCodeStackDepth: Int) =
this(
{
if (cause == null) throw new NullPointerException("cause was null")
Some(if (cause.getMessage == null) "" else cause.getMessage)
},
Some(cause),
failedCodeStackDepth,
None
)
/**
* Create a JUnitTestFailedError with the specified stack depth, detail
* message, and cause.
*
* Note that the detail message associated with cause is
* not automatically incorporated in this throwable's detail
* message.
*
* @param message A detail message for this JUnitTestFailedError.
* @param cause the cause, the Throwable that caused this JUnitTestFailedError to be thrown.
* @param failedCodeStackDepth the depth in the stack trace of this exception at which the line of test code that failed resides.
*
* @throws NullPointerException if either message or cause is null.
*/
def this(message: String, cause: Throwable, failedCodeStackDepth: Int) =
this(
{
if (message == null) throw new NullPointerException("message was null")
Some(message)
},
{
if (cause == null) throw new NullPointerException("cause was null")
Some(cause)
},
failedCodeStackDepth,
None
)
/**
* Returns an exception of class JUnitTestFailedError with failedExceptionStackDepth set to 0 and
* all frames above this stack depth severed off. This can be useful when working with tools (such as IDEs) that do not
* directly support ScalaTest. (Tools that directly support ScalaTest can use the stack depth information delivered
* in the StackDepth exceptions.)
*/
def severedAtStackDepth: JUnitTestFailedError = {
val truncated = getStackTrace.drop(failedCodeStackDepth)
val e = new JUnitTestFailedError(message, cause, 0, payload)
e.setStackTrace(truncated)
e
}
/**
* Returns an instance of this exception's class, identical to this exception,
* except with the detail message option string replaced with the result of passing
* the current detail message to the passed function, fun.
*
* @param fun A function that, given the current optional detail message, will produce
* the modified optional detail message for the result instance of TestFailedException.
*/
def modifyMessage(fun: Option[String] => Option[String]): JUnitTestFailedError = {
val mod = new JUnitTestFailedError(fun(message), cause, failedCodeStackDepth, payload)
mod.setStackTrace(getStackTrace)
mod
}
/**
* Returns an instance of this exception's class, identical to this exception,
* except with the payload option replaced with the result of passing
* the current payload option to the passed function, fun.
*
* @param fun A function that, given the current optional payload, will produce
* the modified optional payload for the result instance of TestFailedException.
*/
def modifyPayload(fun: Option[Any] => Option[Any]): JUnitTestFailedError = {
val currentPayload = payload
val mod = new JUnitTestFailedError(message, cause, failedCodeStackDepth, fun(currentPayload))
mod.setStackTrace(getStackTrace)
mod
}
/**
* Indicates whether this object can be equal to the passed object.
*/
def canEqual(other: Any): Boolean = other.isInstanceOf[JUnitTestFailedError]
/**
* Indicates whether this object is equal to the passed object. If the passed object is
* a JUnitTestFailedError, equality requires equal message,
* cause, and failedCodeStackDepth fields, as well as equal
* return values of getStackTrace.
*/
override def equals(other: Any): Boolean =
other match {
case that: JUnitTestFailedError =>
(that canEqual this) &&
message == that.message &&
cause == that.cause &&
failedCodeStackDepth == that.failedCodeStackDepth &&
getStackTrace.deep == that.getStackTrace.deep
case _ => false
}
/**
* Returns a hash code value for this object.
*/
override def hashCode: Int =
41 * (
41 * (
41 * (
41 + message.hashCode
) + cause.hashCode
) + failedCodeStackDepth.hashCode
) + getStackTrace.hashCode
}