Class UserMutationGenerator

java.lang.Object

org.ek9lang.compiler.fuzz.UserMutationGenerator

public final class UserMutationGenerator
extends Object

Mode 2: Mutation Testing. Given a user's working EK9 source, generates mutated variants — each with a single semantic change that preserves compilability but alters behaviour.

EK9-specific mutation categories differ from traditional tools because EK9 has no break/return/continue, is operator-heavy, has tri-state semantics, and enforces purity contracts.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final record	UserMutationGenerator.MutationCandidate	A mutation candidate: the mutated source with metadata.

Constructor Summary

Constructors

Constructor	Description
UserMutationGenerator()

Method Summary

Modifier and Type	Method	Description
List<UserMutationGenerator.MutationCandidate>	generate(String source, int candidateCount, Random random)	Generate mutation candidates from the given source.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

UserMutationGenerator

public UserMutationGenerator()

Method Details

generate

public List<UserMutationGenerator.MutationCandidate> generate(String source,
 int candidateCount,
 Random random)

Generate mutation candidates from the given source. Each candidate has exactly one semantic change from the original.

Parameters:

source - the original (compilable) EK9 source

candidateCount - maximum number of candidates to generate

random - random source for mutation selection

Returns:

list of mutation candidates