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RestStructureMutator.kt
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RestStructureMutator.kt
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package org.evomaster.core.problem.rest.service
import com.google.inject.Inject
import org.evomaster.core.Lazy
import org.evomaster.core.database.EmptySelects
import org.evomaster.core.problem.rest.HttpVerb
import org.evomaster.core.problem.rest.RestCallAction
import org.evomaster.core.problem.rest.RestIndividual
import org.evomaster.core.problem.rest.SampleType
import org.evomaster.core.search.EvaluatedIndividual
import org.evomaster.core.search.Individual
import org.evomaster.core.search.service.mutator.StructureMutator
class RestStructureMutator : StructureMutator() {
@Inject
private lateinit var sampler: RestSampler
override fun addInitializingActions(individual: EvaluatedIndividual<*>) {
if (!config.shouldGenerateSqlData()) {
return
}
val ind = individual.individual as? RestIndividual
?: throw IllegalArgumentException("Invalid individual type")
val es = individual.fitness.emptySelects
?: return
if (es.queriedData.isEmpty()) {
return
}
val max = config.maxSqlInitActionsPerMissingData
var missing = findMissing(es, ind)
while (!missing.isEmpty()) {
val first = missing.entries.first()
val k = randomness.nextInt(1, max)
(0 until k).forEach {
val insertions = sampler.sampleSqlInsertion(first.key, first.value)
ind.dbInitialization.addAll(0, insertions)
}
/*
When we miss A and B, and we add for A, it can still happen that
then B is covered as well. For example, if A has a non-null
foreign key to B, then generating an action for A would also
imply generating an action for B as well.
So, we need to recompute "missing" each time
*/
missing = findMissing(es, ind)
}
ind.dbInitialization.addAll(0, sampler.existingSqlData)
if (config.generateSqlDataWithDSE) {
//TODO DSE could be plugged in here
}
ind.repairInitializationActions(randomness)
}
private fun findMissing(es: EmptySelects, ind: RestIndividual): Map<String, Set<String>> {
return es.queriedData.filter { e ->
//shouldn't have already an action adding such SQL data
ind.dbInitialization.none { a ->
a.table.name.equals(e.key, ignoreCase = true) && e.value.all { c ->
// either the selected column is already in existing action
(c != "*" && a.selectedColumns.any { x ->
x.name.equals(c, ignoreCase = true)
}) // or we want all, and existing action has all columns
|| (c == "*" && a.table.columns.map { it.name.toLowerCase() }
.containsAll(a.selectedColumns.map { it.name.toLowerCase() }))
}
}
}
}
override fun mutateStructure(individual: Individual) {
if (individual !is RestIndividual) {
throw IllegalArgumentException("Invalid individual type")
}
/*
TODO should be enable the adding/removing of SQL commands here?
Or should that be better to handle with DSE?
*/
if (!individual.canMutateStructure()) {
return // nothing to do
}
when (individual.sampleType) {
SampleType.RANDOM -> mutateForRandomType(individual)
SampleType.SMART_GET_COLLECTION -> mutateForSmartGetCollection(individual)
SampleType.SMART -> throw IllegalStateException(
"SMART sampled individuals shouldn't be marked for structure mutations")
//this would be a bug
else -> throw IllegalStateException("Cannot handle sample type ${individual.sampleType}")
}
}
private fun mutateForSmartGetCollection(ind: RestIndividual) {
/*
recall: in this case, we have 1 or more POST on same
collection, followed by a single GET
However, in case of path parameters (eg "/x/{id}/collection")
before the collection endpoint, there might be one or more POSTs
to setup the intermediary resources
*/
(0 until ind.actions.size - 1).forEach {
val a = ind.actions[it]
Lazy.assert{a !is RestCallAction || a.verb == HttpVerb.POST}
}
Lazy.assert{ val a = ind.actions.last(); a is RestCallAction && a.verb == HttpVerb.GET }
val indices = ind.actions.indices
.filter { i ->
val a = ind.actions[i]
/*
one simple way to distinguish the POST on collection is that
they are not chaining a location, as GET is on same endpoint
*/
a is RestCallAction && !a.saveLocation && a.verb == HttpVerb.POST
}
if (indices.isEmpty()) {
/*
Nothing we can do here. Cannot delete a POST, and
neither add a new one, as we have no template for
it in the test to duplicate.
*/
return
}
if (indices.size > 1 &&
(randomness.nextBoolean() ||
ind.actions.size == config.maxTestSize)) {
//delete one POST, but NOT the GET
val chosen = randomness.choose(indices)
ind.actions.removeAt(chosen)
} else {
//insert a new POST on the collection
val idx = indices.last()
val postTemplate = ind.actions[idx] as RestCallAction
Lazy.assert{postTemplate.verb == HttpVerb.POST && !postTemplate.saveLocation}
val post = sampler.createActionFor(postTemplate, ind.actions.last() as RestCallAction)
/*
where it is inserted should not matter, as long as
it is before the last GET, but after all the other initializing
POSTs
*/
ind.actions.add(idx, post)
}
}
private fun mutateForRandomType(ind: RestIndividual) {
if (ind.actions.size == 1) {
ind.actions.add(sampler.sampleRandomAction(0.05))
return
}
if (randomness.nextBoolean() || ind.actions.size == config.maxTestSize) {
//delete one at random
val chosen = randomness.nextInt(ind.actions.size)
ind.actions.removeAt(chosen)
} else {
//add one at random
val action = sampler.sampleRandomAction(0.05)
val chosen = randomness.nextInt(ind.actions.size)
ind.actions.add(chosen, action)
}
}
}