io.specmatic.core.pattern.XMLPattern.kt Maven / Gradle / Ivy
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Turn your contracts into executable specifications. Contract Driven Development - Collaboratively Design & Independently Deploy MicroServices & MicroFrontends.
package io.specmatic.core.pattern
import io.specmatic.core.*
import io.specmatic.core.Result.Failure
import io.specmatic.core.Result.Success
import io.specmatic.core.pattern.config.NegativePatternConfiguration
import io.specmatic.core.utilities.mapZip
import io.specmatic.core.utilities.parseXML
import io.specmatic.core.value.*
import io.specmatic.core.wsdl.parser.message.MULTIPLE_ATTRIBUTE_VALUE
import io.specmatic.core.wsdl.parser.message.OCCURS_ATTRIBUTE_NAME
const val SPECMATIC_XML_ATTRIBUTE_PREFIX = "${APPLICATION_NAME_LOWER_CASE}_"
const val TYPE_ATTRIBUTE_NAME = "specmatic_type"
const val SOAP_BODY = "body"
const val SOAP_FAULT = "fault"
fun toTypeData(node: XMLNode): XMLTypeData = XMLTypeData(node.name, node.realName, attributeTypeMap(node), nodeTypes(node))
private fun nodeTypes(node: XMLNode): List {
return node.childNodes.map {
it.exactMatchElseType()
}
}
private fun attributeTypeMap(node: XMLNode): Map {
return node.attributes.mapValues { (key, value) ->
when {
value.isPatternToken() -> DeferredPattern(value.trimmed().toStringLiteral(), key)
else -> ExactValuePattern(value)
}
}
}
data class XMLPattern(override val pattern: XMLTypeData = XMLTypeData(realName = ""), override val typeAlias: String? = null) : Pattern, SequenceType {
constructor(node: XMLNode, typeAlias: String? = null) : this(toTypeData(node), typeAlias)
constructor(xmlString: String, typeAlias: String? = null) : this(toXMLNode(parseXML(xmlString)), typeAlias)
fun toPrettyString(): String {
return pattern.toGherkinishNode().toPrettyStringValue()
}
override fun matches(sampleData: List, resolver: Resolver): ConsumeResult {
val xmlValues = sampleData.filterIsInstance()
if (xmlValues.size != sampleData.size)
return ConsumeResult(Failure("XMLPattern can only match XML values"))
return when {
pattern.isOptionalNode() -> matchesOptionalNode(xmlValues, resolver)
pattern.isMultipleNode() -> matchesMultipleNodes(xmlValues, resolver)
else -> matchesRequiredNode(xmlValues, sampleData, resolver)
}
}
private fun matchesRequiredNode(
xmlValues: List,
sampleData: List,
resolver: Resolver
): ConsumeResult = if (xmlValues.isEmpty())
ConsumeResult(Failure("Didn't get enough values", breadCrumb = this.pattern.name), sampleData)
else
ConsumeResult(matches(xmlValues.first(), resolver), xmlValues.drop(1))
private fun matchesMultipleNodes(
xmlValues: List,
resolver: Resolver
): ConsumeResult {
val remainder = xmlValues.dropWhile {
matches(it, resolver) is Success
}
return if (remainder.isNotEmpty() && remainder.first().let { it is XMLNode && it.name == this.pattern.name }) {
ConsumeResult(matches(remainder.first(), resolver), remainder)
} else if (remainder.isNotEmpty()) {
val provisionalError = ProvisionalError(
matches(remainder.first(), resolver) as Failure,
this,
remainder.first()
)
ConsumeResult(Success(), remainder, provisionalError)
} else {
ConsumeResult(Success(), remainder)
}
}
private fun matchesOptionalNode(
xmlValues: List,
resolver: Resolver
): ConsumeResult = if (xmlValues.isEmpty())
ConsumeResult(Success())
else {
val xmlValue = xmlValues.first()
when (val result = matches(xmlValue, resolver)) {
is Success -> ConsumeResult(Success(), xmlValues.drop(1))
is Failure -> when {
xmlValue is XMLNode && xmlValue.name == this.pattern.name -> ConsumeResult(result, xmlValues)
else -> ConsumeResult(Success(), xmlValues, ProvisionalError(result, this, xmlValue))
}
}
}
override fun matches(sampleData: Value?, resolver: Resolver): Result {
if (sampleData !is XMLNode)
return Failure("Expected xml, got ${sampleData?.displayableType()}").breadCrumb(pattern.name)
if(pattern.isNillable()) {
if(sampleData.childNodes.isEmpty())
return Success()
}
val matchingType = if (this.pattern.attributes.containsKey(TYPE_ATTRIBUTE_NAME)) {
val typeName = this.pattern.getAttributeValue(TYPE_ATTRIBUTE_NAME)
val xmlType = (resolver.getPattern("($typeName)") as XMLPattern)
val attributesFromReferring = this.pattern.attributes.filterKeys { it != TYPE_ATTRIBUTE_NAME }
val attributesFromReferred = xmlType.pattern.attributes.filterKeys { it != TYPE_ATTRIBUTE_NAME }
val attributes = attributesFromReferred + attributesFromReferring
xmlType.copy(pattern = xmlType.pattern.copy(name = this.pattern.name, realName = this.pattern.realName, attributes = attributes))
} else {
this
}
return matchName(sampleData, resolver).ifSuccess {
matchingType.matchNamespaces(sampleData)
}.ifSuccess {
matchingType.matchAttributes(sampleData, resolver)
}.ifSuccess {
matchingType.matchNodes(sampleData, resolver)
}.breadCrumb(pattern.name)
}
private fun matchNodes(
sampleData: XMLNode,
resolver: Resolver
): Result {
if(sampleData.name.lowercase() == SOAP_BODY && sampleData.firstNode() is XMLNode && sampleData.firstNode()?.name?.lowercase() == SOAP_FAULT)
return Success()
val results = pattern.nodes.scanIndexed(
ConsumeResult(
Success(),
sampleData.childNodes
)
) { index, consumeResult, type ->
when (val resolvedType = resolvedHop(type, resolver)) {
is ListPattern -> ConsumeResult(
resolvedType.matches(
this.listOf(
consumeResult.remainder.subList(index, pattern.nodes.indices.last),
resolver
), resolver
),
emptyList()
)
else -> {
try {
if (sampleData.childNodes.size == 1 && consumeResult.remainder.size == 1 && sampleData.childNodes.first() is StringValue) {
val childValue = when (val childNode = sampleData.childNodes[index]) {
is StringValue -> when {
childNode.isPatternToken() -> childNode.trimmed()
else -> {
attempt(
"Couldn't read value ${childNode.string} as type ${resolvedType.pattern}",
breadCrumb = breadCrumbIfXMLTag(resolvedType)
) { resolvedType.parse(childNode.string, resolver) }
}
}
else -> childNode
}
val factKey = if (childValue is XMLNode) childValue.name else null
ConsumeResult(resolver.matchesPattern(factKey, resolvedType, childValue), emptyList())
} else if (expectingEmpty(sampleData, resolvedType, resolver)) {
ConsumeResult(Success())
} else {
resolvedType.matches(consumeResult.remainder, resolver).cast("xml")
}
} catch (e: ContractException) {
ConsumeResult(e.failure(), consumeResult.remainder)
}
}
}
}
return failureFrom(results) ?: Success()
}
private fun breadCrumbIfXMLTag(resolvedType: Pattern): String {
return when (resolvedType) {
is XMLPattern -> resolvedType.pattern.name
else -> ""
}
}
private fun failureFrom(results: List>): Result? {
val nodeStructureMismatchError = results.find {
it.result is Failure
}?.result
val nothingEvenCameCloseError = lazy {
when {
results.isNotEmpty() && results.last().remainder.isNotEmpty() -> {
val unexpectedValue = results.last().remainder.first()
unexpectedValue.matchFailure()
}
else -> null
}
}
return (nodeStructureMismatchError ?: nothingEvenCameCloseError.value)
}
private fun matchNamespaces(sampleData: XMLNode): Result {
return PLACEHOLDER_USE_GIT_BLAME_TO_FIND_RELEVANT_COMMIT(Success(), "Removed namespace validation but we should put it back")
}
private fun matchAttributes(sampleData: XMLNode, resolver: Resolver): Result {
val patternAttributesWithoutXmlns = pattern.attributes.filterNot {
it.key == "xmlns" || it.key.startsWith("xmlns:") || it.key.startsWith(SPECMATIC_XML_ATTRIBUTE_PREFIX)
}
val sampleAttributesWithoutXmlns = sampleData.attributes.filterNot {
it.key == "xmlns" || it.key.startsWith("xmlns:") || it.key.startsWith(SPECMATIC_XML_ATTRIBUTE_PREFIX)
}
val missingKey = resolver.findKeyError(
ignoreXMLNamespaces(patternAttributesWithoutXmlns),
ignoreXMLNamespaces(sampleAttributesWithoutXmlns)
)
if (missingKey != null)
return missingKey.missingKeyToResult("attribute", resolver.mismatchMessages)
return matchAttributes(patternAttributesWithoutXmlns, sampleAttributesWithoutXmlns, resolver)
}
private fun matchName(sampleData: XMLNode, resolver: Resolver): Result {
if (sampleData.name != pattern.name)
return mismatchResult(pattern.name, sampleData.name, resolver.mismatchMessages)
return Success()
}
private fun matchAttributes(
patternAttributesWithoutXmlns: Map,
sampleAttributesWithoutXmlns: Map,
resolver: Resolver
): Result =
mapZip(
ignoreXMLNamespaces(patternAttributesWithoutXmlns),
ignoreXMLNamespaces(sampleAttributesWithoutXmlns)
).asSequence().map { (key, patternValue, sampleValue) ->
try {
val resolvedValue: Value = when {
sampleValue.isPatternToken() -> sampleValue.trimmed()
else -> patternValue.parse(sampleValue.string, resolver)
}
resolver.matchesPattern(key, patternValue, resolvedValue)
} catch (e: ContractException) {
e.failure()
}.breadCrumb(key)
}.find { it is Failure } ?: Success()
private fun ignoreXMLNamespaces(attributes: Map): Map =
attributes.filterNot { it.key.lowercase().startsWith("xmlns:") }
private fun expectingEmpty(sampleData: XMLNode, type: Pattern, resolver: Resolver): Boolean {
val resolvedPatternSet = type.patternSet(resolver).map { resolvedHop(it, resolver) }
return sampleData.childNodes.isEmpty() && pattern.nodes.size == 1 && (EmptyStringPattern in resolvedPatternSet || StringPattern() in resolvedPatternSet)
}
override fun listOf(valueList: List, resolver: Resolver): Value {
return XMLNode("", "", emptyMap(), valueList.map { it as XMLNode }, "", emptyMap())
}
override fun generate(resolver: Resolver): XMLNode {
val name = pattern.name
val nonSpecmaticAttributes = pattern.attributes.filterNot { it.key.startsWith(SPECMATIC_XML_ATTRIBUTE_PREFIX) }
val newAttributes = nonSpecmaticAttributes.mapKeys { entry ->
withoutOptionality(entry.key)
}.mapValues { (key, pattern) ->
attempt(breadCrumb = "$name.$key") {
resolver.withCyclePrevention(pattern) { cyclePreventedResolver ->
cyclePreventedResolver.generate(key, pattern)
}
}
}.mapValues {
StringValue(it.value.toStringLiteral())
}
val nodes = pattern.nodes.asSequence().map {
resolvedHop(it, resolver)
}.map { pattern ->
attempt(breadCrumb = name) {
resolver.withCyclePrevention(pattern) { cyclePreventedResolver ->
when {
pattern is ListPattern -> (pattern.generate(cyclePreventedResolver) as XMLNode).childNodes
pattern is XMLPattern && pattern.occurMultipleTimes() ->
0.until(randomNumber(RANDOM_NUMBER_CEILING))
.map { pattern.generate(cyclePreventedResolver) }
else -> listOf(pattern.generate(cyclePreventedResolver))
}
}
}
}.flatten().map {
when (it) {
is XMLValue -> it
else -> StringValue(it.toStringLiteral())
}
}.toList()
return XMLNode(pattern.realName, newAttributes, nodes)
}
override fun newBasedOn(row: Row, resolver: Resolver): Sequence> {
return forEachKeyCombinationIn(
pattern.attributes,
row, returnValues { attributePattern: Map ->
attempt(breadCrumb = pattern.name) {
newMapBasedOn(attributePattern, row, resolver).map { it.value }.map {
it.mapKeys { entry -> withoutOptionality(entry.key) }
}
}
}).map { it.value }.flatMap { newAttributes ->
val newNodesList = when {
row.containsField(pattern.name) -> {
attempt(breadCrumb = pattern.name) {
val dereferenced = dereferenceType(resolver)
if (dereferenced.pattern.nodes.isEmpty())
throw ContractException("Node ${pattern.name} is empty but an example with this name exists")
val parsedData =
dereferenced.pattern.nodes[0].parse(row.getField(dereferenced.pattern.name), resolver)
val matchResult = dereferenced.pattern.nodes[0].matches(parsedData, resolver)
if (matchResult is Failure)
throw ContractException(matchResult.toFailureReport())
sequenceOf(listOf(ExactValuePattern(parsedData)))
}
}
else -> {
listCombinations(pattern.nodes.map { childPattern ->
attempt(breadCrumb = pattern.name) {
when (childPattern) {
is XMLPattern -> {
val dereferenced: XMLPattern = childPattern.dereferenceType(resolver)
resolver.withCyclePrevention(dereferenced) { cyclePreventedResolver ->
when {
dereferenced.occurMultipleTimes() -> {
dereferenced.newBasedOn(row, cyclePreventedResolver)
.map { it.value as XMLPattern }
}
dereferenced.isOptional() -> {
dereferenced.newBasedOn(row, cyclePreventedResolver)
.map { it.value as XMLPattern }.plus(null)
}
else -> dereferenced.newBasedOn(row, cyclePreventedResolver)
.map { it.value as XMLPattern }
}
}
}
else -> resolver.withCyclePrevention(childPattern) { cyclePreventedResolver ->
childPattern.newBasedOn(row, cyclePreventedResolver).map { it.value }
}
}
}
}.map { HasValue(it) }).map { it.value }
}
}
newNodesList.map { newNodes ->
XMLPattern(XMLTypeData(pattern.name, pattern.realName, newAttributes, newNodes))
}
}.map { HasValue(it) }
}
override fun newBasedOn(resolver: Resolver): Sequence {
return allOrNothingCombinationIn(
pattern.attributes,
Row(),
null,
null, returnValues { attributePattern: Map ->
attempt(breadCrumb = this.pattern.name) {
newBasedOn(attributePattern, resolver).map {
it.mapKeys { entry -> withoutOptionality(entry.key) }
}
}
}).map { it.value }.flatMap { newAttributes ->
val newNodesList = allOrNothingListCombinations(pattern.nodes.map { childPattern ->
attempt(breadCrumb = this.pattern.name) {
when (childPattern) {
is XMLPattern -> {
val dereferenced: XMLPattern = childPattern.dereferenceType(resolver)
resolver.withCyclePrevention(dereferenced) { cyclePreventedResolver ->
when {
dereferenced.occurMultipleTimes() -> {
dereferenced.newBasedOn(cyclePreventedResolver)
}
dereferenced.isOptional() -> {
dereferenced.newBasedOn(cyclePreventedResolver).plus(null)
}
else -> dereferenced.newBasedOn(cyclePreventedResolver)
}
}
}
else -> resolver.withCyclePrevention(childPattern) { cyclePreventedResolver ->
childPattern.newBasedOn(cyclePreventedResolver)
}
}
}
}
)
newNodesList.map { newNodes ->
XMLPattern(XMLTypeData(pattern.name, pattern.realName, newAttributes, newNodes.toList()))
}
}
}
override fun negativeBasedOn(row: Row, resolver: Resolver, config: NegativePatternConfiguration): Sequence> {
return newBasedOn(row, resolver).map { it.value as XMLPattern }.map { HasValue(it) }
}
private fun dereferenceType(resolver: Resolver): XMLPattern {
if (!hasType()) {
return this
}
val specmaticType = pattern.attributes[TYPE_ATTRIBUTE_NAME]
val resolved = resolver.getPattern("($specmaticType)") as XMLPattern
return resolved.copy(
pattern = resolved.pattern.copy(
name = this.pattern.name,
realName = this.pattern.realName,
attributes = resolved.pattern.attributes.plus(this.pattern.attributes)
)
)
}
private fun hasType(): Boolean = pattern.attributes.containsKey(TYPE_ATTRIBUTE_NAME)
fun occurMultipleTimes(): Boolean = pattern.getNodeOccurrence() == NodeOccurrence.Multiple
private fun isOptional(): Boolean = pattern.getNodeOccurrence() == NodeOccurrence.Optional
override fun parse(value: String, resolver: Resolver): Value {
return toXMLNode(parseXML(value))
}
override fun encompasses(
otherPattern: Pattern,
thisResolver: Resolver,
otherResolver: Resolver,
typeStack: TypeStack
): Result {
val otherResolvedPattern = resolvedHop(otherPattern, otherResolver)
return when (otherResolvedPattern) {
is ExactValuePattern -> otherResolvedPattern.fitsWithin(
listOf(this),
otherResolver,
thisResolver,
typeStack
)
is XMLPattern -> nodeNamesShouldBeEqual(otherResolvedPattern).ifSuccess {
mapEncompassesMap(
pattern.attributes.filterNot { it.key.startsWith(SPECMATIC_XML_ATTRIBUTE_PREFIX) || it.key.startsWith("xmlns:") },
otherResolvedPattern.pattern.attributes.filterNot { it.key.startsWith(SPECMATIC_XML_ATTRIBUTE_PREFIX) || it.key.startsWith("xmlns:") },
thisResolver,
otherResolver
)
}.ifSuccess {
thisOccurrenceEncompassesTheOther(this, otherResolvedPattern)
}.ifSuccess {
val theseMembers = this.memberList
val otherMembers = otherResolvedPattern.memberList
val others = otherMembers.getEncompassables(otherResolver)
val these = adapt(adaptFromList(theseMembers.getEncompassables(thisResolver), thisResolver), thisResolver)
val adaptedOthers = adapt(others, otherResolver)
val results =
these.runningFold(ConsumeResult(adaptedOthers)) { consumeResult, thisOne ->
val unmatched = dropOneIfMatching(consumeResult.remainder) { otherOne ->
encompassResult(thisOne, otherOne, thisResolver, otherResolver, typeStack)
}
if (unmatched.size == consumeResult.remainder.size) {
val failure = encompassResult(
thisOne,
unmatched.first(),
thisResolver,
otherResolver,
typeStack
) as Failure
ConsumeResult(failure, unmatched)
} else {
ConsumeResult(Success(), unmatched)
}
}
val failureResult = results.find { it.result is Failure }?.result
failureResult ?: provisionalFailure(results) ?: Success()
}
else -> mismatchResult(this, otherResolvedPattern, thisResolver.mismatchMessages)
}.breadCrumb(this.pattern.name)
}
private fun provisionalFailure(results: List>): Failure? {
if (results.isEmpty() || results.last().remainder.isEmpty())
return null
val provisionalError = results.map { it.provisionalError?.result }.filterIsInstance().firstOrNull()
return provisionalError ?: genericProvisionalFailure(results)
}
private fun genericProvisionalFailure(results: List>): Failure {
val unmatched = results.last().remainder
val nodeDescriptor = when (unmatched.size) {
1 -> "Node"
else -> "Nodes"
}
val names = unmatched.joinToString(", ") {
when (it) {
is XMLPattern -> it.pattern.name
else -> it.typeName
}
}
return Failure("$nodeDescriptor named $names were not matched")
}
private fun dropOneIfMatching(remainder: List, test: (Pattern) -> Result): List {
if(remainder.isEmpty())
return remainder
val first = remainder.first()
return when(test(first)) {
is Success -> remainder.drop(1)
is Failure -> remainder
}
}
private fun encompassResult(
thisOne: Pattern,
otherOne: Pattern,
thisResolver: Resolver,
otherResolver: Resolver,
typeStack: TypeStack
): Result {
return try {
val otherOneAdjustedForExactValue = when {
otherOne is ExactValuePattern && otherOne.pattern is StringValue -> ExactValuePattern(
thisOne.parse(
otherOne.pattern.string,
thisResolver
)
)
else -> otherOne
}
thisOne.encompasses(otherOneAdjustedForExactValue, thisResolver, otherResolver, typeStack)
} catch (e: Throwable) {
Failure(e.message ?: e.javaClass.name)
}
}
private fun getNodeOccurrence(): NodeOccurrence {
return pattern.getNodeOccurrence()
}
private fun thisOccurrenceEncompassesTheOther(thisOne: XMLPattern, otherOne: XMLPattern): Result {
val thisTypeOccurrence = thisOne.pattern.getAttributeValue(OCCURS_ATTRIBUTE_NAME)
val otherTypeOccurrence = otherOne.pattern.getAttributeValue(OCCURS_ATTRIBUTE_NAME)
return when (thisTypeOccurrence) {
otherTypeOccurrence -> Success()
else -> thisOne.getNodeOccurrence().encompasses(otherOne.getNodeOccurrence())
}
}
private fun nodeNamesShouldBeEqual(otherResolvedPattern: XMLPattern) = when {
pattern.name != otherResolvedPattern.pattern.name ->
Failure("Expected a node named ${pattern.name}, but got ${otherResolvedPattern.pattern.name} instead.")
else -> Success()
}
private fun adapt(types: List, resolver: Resolver): List {
if (types.isEmpty())
return listOf(EmptyStringPattern)
return adaptFromList(types, resolver)
}
private fun adaptFromList(types: List, resolver: Resolver): List {
val first = types.firstOrNull()
if (first is ListPattern) {
val typeName = first.pattern.pattern.toString().removeSurrounding("(", ")")
val type = resolver.getPattern("($typeName)")
if (type !is XMLPattern)
throw ContractException("A list specification inside an XML definition must refer to an XML type. But $typeName is not an XML type.")
val multipleOccursAttribute =
mapOf(OCCURS_ATTRIBUTE_NAME to ExactValuePattern(StringValue(MULTIPLE_ATTRIBUTE_VALUE)))
return listOf(
type.copy(
pattern = type.pattern.copy(
attributes = type.pattern.attributes.plus(
multipleOccursAttribute
)
)
)
)
}
return types
}
val referredType: String?
get() {
return pattern.attributes[TYPE_ATTRIBUTE_NAME]?.let {
it as ExactValuePattern
it.pattern.toStringLiteral()
}
}
override val memberList: MemberList
get() = MemberList(pattern.nodes, null)
override val typeName: String = "xml"
// TODO not sure if this is still needed
fun toGherkinString(additionalIndent: String = "", indent: String = ""): String {
return pattern.toGherkinString(additionalIndent, indent)
}
fun toGherkinXMLNode(): XMLNode {
return pattern.toGherkinishNode()
}
fun toGherkinStatement(specmaticTypeName: String): String {
val typeString = this.toGherkinXMLNode().toPrettyStringValue().trim()
return "And type $specmaticTypeName\n\"\"\"\n$typeString\n\"\"\""
}
}
private fun PLACEHOLDER_USE_GIT_BLAME_TO_FIND_RELEVANT_COMMIT (value: T, s: String): T {
return value
}