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Corrected synthetic FuzzedMethodDescription for fuzzing thisInstance #892 #897

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Merged
merged 1 commit into from
Sep 12, 2022
Merged

Corrected synthetic FuzzedMethodDescription for fuzzing thisInstance #892 #897

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14 changes: 8 additions & 6 deletions utbot-framework/src/main/kotlin/org/utbot/engine/UtBotSymbolicEngine.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -393,6 +393,12 @@ class UtBotSymbolicEngine(
val fallbackModelProvider = FallbackModelProvider(defaultIdGenerator)
val constantValues = collectConstantsForFuzzer(graph)

val syntheticMethodForFuzzingThisInstanceDescription =
FuzzedMethodDescription("thisInstance", voidClassId, listOf(classUnderTest), constantValues).apply {
className = classUnderTest.simpleName
packageName = classUnderTest.packageName
}

val random = Random(0)
val thisInstance = when {
methodUnderTest.isStatic -> null
Expand All @@ -406,7 +412,7 @@ class UtBotSymbolicEngine(
}
else -> {
ObjectModelProvider(defaultIdGenerator).withFallback(fallbackModelProvider).generate(
FuzzedMethodDescription("thisInstance", voidClassId, listOf(classUnderTest), constantValues)
syntheticMethodForFuzzingThisInstanceDescription
).take(10).shuffled(random).map { it.value.model }.first().apply {
if (this is UtNullModel) { // it will definitely fail because of NPE,
return@flow
Expand All @@ -431,11 +437,7 @@ class UtBotSymbolicEngine(
fuzz(methodUnderTestDescription, modelProvider(defaultModelProviders(defaultIdGenerator)))
} else {
// in case a method with no parameters is passed fuzzing tries to fuzz this instance with different constructors, setters and field mutators
val thisMethodDescription = FuzzedMethodDescription("thisInstance", voidClassId, listOf(classUnderTest), constantValues).apply {
className = classUnderTest.simpleName
packageName = classUnderTest.packageName
}
fuzz(thisMethodDescription, ObjectModelProvider(defaultIdGenerator).apply {
fuzz(syntheticMethodForFuzzingThisInstanceDescription, ObjectModelProvider(defaultIdGenerator).apply {
totalLimit = 500
})
}.withMutations(
Expand Down