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/*
* Copyright 2001-2013 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
import org.scalatest.exceptions.StackDepthExceptionHelper
import org.scalatest.exceptions.TestFailedException
import org.scalatest.matchers._
import java.lang.reflect.Method
import java.lang.reflect.Modifier
import scala.util.matching.Regex
import java.lang.reflect.Field
import org.scalatest.exceptions.TestFailedException
import org.scalatest.exceptions.StackDepthException
import org.scalactic._
// TODO: drop generic support for be as an equality comparison, in favor of specific ones.
// TODO: mention on JUnit and TestNG docs that you can now mix in ShouldMatchers or MustMatchers
// TODO: Put links from ShouldMatchers to wherever I reveal the matrix and algo of how properties are checked dynamically.
// TODO: double check that I wrote tests for (length (7)) and (size (8)) in parens
// TODO: document how to turn off the === implicit conversion
// TODO: Document you can use JMock, EasyMock, etc.
private[scalatest] object MatchersHelper {
// SKIP-SCALATESTJS-START
// If the symbol passed is 'title, this will look for a field named "title", a method named "title", or a
// method named "getTitle". The method must take no parameters.
//
// F (field) | M (method) | G (get or is method) | Result
// 0 0 0 None
// 0 0 1 Some(G)
// 0 1 0 Some(M)
// 0 1 1 Some(M) prefer a Scala style one of a Java style, such as when using BeanProperty annotation
// 1 0 0 Some(F) ignore the field if there's a method. in Java often name a field and get method the same
// 1 0 1 Some(G)
// 1 1 0 Some(M)
// 1 1 1 Some(M) prefer a Scala style one of a Java style, such as when using BeanProperty annotation
//
def accessProperty(objectWithProperty: AnyRef, propertySymbol: Symbol, isBooleanProperty: Boolean): Option[Any] = {
// If 'title passed, propertyName would be "title"
val propertyName = propertySymbol.name
// if propertyName is '>, mangledPropertyName would be "$greater"
val mangledPropertyName = transformOperatorChars(propertyName)
// fieldNameToAccess and methodNameToInvoke would also be "title"
val fieldNameToAccess = mangledPropertyName
val methodNameToInvoke = mangledPropertyName
// methodNameToInvokeWithGet would be "getTitle"
val prefix = if (isBooleanProperty) "is" else "get"
val methodNameToInvokeWithGet = prefix + mangledPropertyName(0).toUpper + mangledPropertyName.substring(1)
val firstChar = propertyName(0).toLower
val methodNameStartsWithVowel = firstChar == 'a' || firstChar == 'e' || firstChar == 'i' ||
firstChar == 'o' || firstChar == 'u'
def isFieldToAccess(field: Field): Boolean = field.getName == fieldNameToAccess
// If it is a predicate, I check the result type, otherwise I don't. Maybe I should just do that. Could be a later enhancement.
def isMethodToInvoke(method: Method): Boolean =
method.getName == methodNameToInvoke && method.getParameterTypes.length == 0 && !Modifier.isStatic(method.getModifiers()) &&
(!isBooleanProperty || method.getReturnType == classOf[Boolean])
def isGetMethodToInvoke(method: Method): Boolean =
method.getName == methodNameToInvokeWithGet && method.getParameterTypes.length == 0 && !Modifier.isStatic(method.getModifiers()) &&
(!isBooleanProperty || method.getReturnType == classOf[Boolean])
val fieldOption = objectWithProperty.getClass.getFields.find(isFieldToAccess)
val methodOption = objectWithProperty.getClass.getMethods.find(isMethodToInvoke)
val getMethodOption = objectWithProperty.getClass.getMethods.find(isGetMethodToInvoke)
(fieldOption, methodOption, getMethodOption) match {
case (_, Some(method), _) => Some(method.invoke(objectWithProperty, Array[AnyRef](): _*))
case (_, None, Some(getMethod)) => Some(getMethod.invoke(objectWithProperty, Array[AnyRef](): _*))
case (Some(field), None, None) => Some(field.get(objectWithProperty))
case (None, None, None) => None
}
}
// SKIP-SCALATESTJS-END
def transformOperatorChars(s: String): String = {
val builder = new StringBuilder
for (i <- 0 until s.length) {
val ch = s.charAt(i)
val replacement =
ch match {
case '!' => "$bang"
case '#' => "$hash"
case '~' => "$tilde"
case '|' => "$bar"
case '^' => "$up"
case '\\' => "$bslash"
case '@' => "$at"
case '?' => "$qmark"
case '>' => "$greater"
case '=' => "$eq"
case '<' => "$less"
case ':' => "$colon"
case '/' => "$div"
case '-' => "$minus"
case '+' => "$plus"
case '*' => "$times"
case '&' => "$amp"
case '%' => "$percent"
case _ => ""
}
if (replacement.length > 0)
builder.append(replacement)
else
builder.append(ch)
}
builder.toString
}
def newTestFailedException(message: String, optionalCause: Option[Throwable] = None, pos: source.Position): Throwable = {
new TestFailedException((_: StackDepthException) => Some(message), optionalCause, pos)
}
def andMatchersAndApply[T](left: T, leftMatcher: Matcher[T], rightMatcher: Matcher[T]): MatchResult = {
val leftMatchResult = leftMatcher(left)
val rightMatchResult = rightMatcher(left) // Not short circuiting anymore
if (!leftMatchResult.matches) leftMatchResult
else {
MatchResult(
rightMatchResult.matches,
Resources.rawCommaBut,
Resources.rawCommaAnd,
Resources.rawCommaBut,
Resources.rawCommaAnd,
Vector(NegatedFailureMessage(leftMatchResult), MidSentenceFailureMessage(rightMatchResult)),
Vector(NegatedFailureMessage(leftMatchResult), MidSentenceNegatedFailureMessage(rightMatchResult)),
Vector(MidSentenceNegatedFailureMessage(leftMatchResult), MidSentenceFailureMessage(rightMatchResult)),
Vector(MidSentenceNegatedFailureMessage(leftMatchResult), MidSentenceNegatedFailureMessage(rightMatchResult))
)
}
}
def orMatchersAndApply[T](left: T, leftMatcher: Matcher[T], rightMatcher: Matcher[T]): MatchResult = {
val leftMatchResult = leftMatcher(left)
val rightMatchResult = rightMatcher(left) // Not short circuiting anymore
if (leftMatchResult.matches) leftMatchResult.copy(matches = true)
else {
MatchResult(
rightMatchResult.matches,
Resources.rawCommaAnd,
Resources.rawCommaAnd,
Resources.rawCommaAnd,
Resources.rawCommaAnd,
Vector(FailureMessage(leftMatchResult), MidSentenceFailureMessage(rightMatchResult)),
Vector(FailureMessage(leftMatchResult), MidSentenceNegatedFailureMessage(rightMatchResult)),
Vector(MidSentenceFailureMessage(leftMatchResult), MidSentenceFailureMessage(rightMatchResult)),
Vector(MidSentenceFailureMessage(leftMatchResult), MidSentenceNegatedFailureMessage(rightMatchResult))
)
}
}
// SKIP-SCALATESTJS-START
def matchSymbolToPredicateMethod(left: AnyRef, right: Symbol, hasArticle: Boolean, articleIsA: Boolean, prettifier: Prettifier, pos: source.Position): MatchResult = {
// If 'empty passed, rightNoTick would be "empty"
val propertyName = right.name
accessProperty(left, right, true) match {
case None =>
// if propertyName is '>, mangledPropertyName would be "$greater"
val mangledPropertyName = transformOperatorChars(propertyName)
// methodNameToInvoke would also be "empty"
val methodNameToInvoke = mangledPropertyName
// methodNameToInvokeWithIs would be "isEmpty"
val methodNameToInvokeWithIs = "is"+ mangledPropertyName(0).toUpper + mangledPropertyName.substring(1)
val firstChar = propertyName(0).toLower
val methodNameStartsWithVowel = firstChar == 'a' || firstChar == 'e' || firstChar == 'i' ||
firstChar == 'o' || firstChar == 'u'
throw newTestFailedException(
if (methodNameStartsWithVowel)
FailureMessages.hasNeitherAnOrAnMethod(prettifier, left, UnquotedString(methodNameToInvoke), UnquotedString(methodNameToInvokeWithIs))
else
FailureMessages.hasNeitherAOrAnMethod(prettifier, left, UnquotedString(methodNameToInvoke), UnquotedString(methodNameToInvokeWithIs)),
None,
pos
)
case Some(result) =>
val (wasNot, was) =
if (hasArticle) {
if (articleIsA) (Resources.rawWasNotA, Resources.rawWasA) else (Resources.rawWasNotAn, Resources.rawWasAn)
}
else (Resources.rawWasNot, Resources.rawWas)
MatchResult(
result == true, // Right now I just leave the return value of accessProperty as Any
wasNot,
was,
Vector(left, UnquotedString(propertyName))
)
}
}
// SKIP-SCALATESTJS-END
def checkPatternMatchAndGroups(matches: Boolean, left: String, pMatcher: java.util.regex.Matcher, regex: Regex, groups: IndexedSeq[String],
didNotMatchMessage: => String, matchMessage: => String, notGroupAtIndexMessage: => String, notGroupMessage: => String,
andGroupMessage: => String): MatchResult = {
if (groups.size == 0 || !matches)
MatchResult(
matches,
didNotMatchMessage,
matchMessage,
Vector(left, UnquotedString(regex.toString))
)
else {
val count = pMatcher.groupCount
val failed = // Find the first group that fails
groups.zipWithIndex.find { case (group, idx) =>
val groupIdx = idx + 1
!(groupIdx <= count && pMatcher.group(groupIdx) == group)
}
failed match {
case Some((group, idx)) =>
MatchResult(
false,
if (groups.size > 1) notGroupAtIndexMessage else notGroupMessage,
andGroupMessage,
if (groups.size > 1) Vector(left, UnquotedString(regex.toString), pMatcher.group(idx + 1), UnquotedString(group), idx) else Vector(left, UnquotedString(regex.toString), pMatcher.group(1), UnquotedString(group)),
Vector(left, UnquotedString(regex.toString), UnquotedString(groups.mkString(", ")))
)
case None =>
// None of group failed
MatchResult(
true,
notGroupMessage,
andGroupMessage,
Vector(left, UnquotedString(regex.toString), pMatcher.group(1), UnquotedString(groups.mkString(", "))),
Vector(left, UnquotedString(regex.toString), UnquotedString(groups.mkString(", ")))
)
}
}
}
def fullyMatchRegexWithGroups(left: String, regex: Regex, groups: IndexedSeq[String]): MatchResult = {
val pMatcher = regex.pattern.matcher(left)
val matches = pMatcher.matches
checkPatternMatchAndGroups(matches, left, pMatcher, regex, groups, Resources.rawDidNotFullyMatchRegex, Resources.rawFullyMatchedRegex, Resources.rawFullyMatchedRegexButNotGroupAtIndex,
Resources.rawFullyMatchedRegexButNotGroup, Resources.rawFullyMatchedRegexAndGroup)
}
def startWithRegexWithGroups(left: String, regex: Regex, groups: IndexedSeq[String]): MatchResult = {
val pMatcher = regex.pattern.matcher(left)
val matches = pMatcher.lookingAt
checkPatternMatchAndGroups(matches, left, pMatcher, regex, groups, Resources.rawDidNotStartWithRegex, Resources.rawStartedWithRegex, Resources.rawStartedWithRegexButNotGroupAtIndex,
Resources.rawStartedWithRegexButNotGroup, Resources.rawStartedWithRegexAndGroup)
}
def endWithRegexWithGroups(left: String, regex: Regex, groups: IndexedSeq[String]): MatchResult = {
val pMatcher = regex.pattern.matcher(left)
val found = pMatcher.find
val matches = found && pMatcher.end == left.length
checkPatternMatchAndGroups(matches, left, pMatcher, regex, groups, Resources.rawDidNotEndWithRegex, Resources.rawEndedWithRegex, Resources.rawEndedWithRegexButNotGroupAtIndex,
Resources.rawEndedWithRegexButNotGroup, Resources.rawEndedWithRegexAndGroup)
}
def includeRegexWithGroups(left: String, regex: Regex, groups: IndexedSeq[String]): MatchResult = {
val pMatcher = regex.pattern.matcher(left)
val matches = pMatcher.find
checkPatternMatchAndGroups(matches, left, pMatcher, regex, groups, Resources.rawDidNotIncludeRegex, Resources.rawIncludedRegex, Resources.rawIncludedRegexButNotGroupAtIndex,
Resources.rawIncludedRegexButNotGroup, Resources.rawIncludedRegexAndGroup)
}
private[scalatest] def checkExpectedException[T](f: => Any, clazz: Class[T], wrongExceptionMessageFun: (Any, Any) => String, exceptionExpectedMessageFun: String => String, pos: source.Position): T = {
val caught = try {
f
None
}
catch {
case u: Throwable => {
if (!clazz.isAssignableFrom(u.getClass)) {
val s = wrongExceptionMessageFun(clazz.getName, u.getClass.getName)
throw newTestFailedException(s, Some(u), pos)
}
else {
Some(u)
}
}
}
caught match {
case None =>
val message = exceptionExpectedMessageFun(clazz.getName)
throw newTestFailedException(message, None, pos)
case Some(e) => e.asInstanceOf[T] // I know this cast will succeed, becuase iSAssignableFrom succeeded above
}
}
def checkNoException(fun: => Any, pos: source.Position): Assertion = {
try {
fun
Succeeded
}
catch {
case u: Throwable => {
val message = Resources.exceptionNotExpected(u.getClass.getName)
throw new TestFailedException((sde: exceptions.StackDepthException) => Some(message), Some(u), pos)
}
}
}
def indicateSuccess(message: => String): Assertion = Succeeded
def indicateSuccess(shouldBeTrue: Boolean, message: => String, negatedMessage: => String): Assertion = Succeeded
def indicateFailure(failureMessage: => String, optionalCause: Option[Throwable], pos: source.Position): Assertion = {
val message: String = failureMessage
throw new TestFailedException((sde: exceptions.StackDepthException) => Some(message), optionalCause, pos)
}
def indicateFailure(e: TestFailedException): Assertion =
throw e
}
