Java regex simple lookaheads - #1646
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…regex-simple-assertions # Conflicts: # core/src/main/antlr4/org/evomaster/core/parser/RegexJava.g4 # core/src/main/kotlin/org/evomaster/core/parser/GeneRegexJavaVisitor.kt
lmasroca
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Jul 20, 2026
…ssertionRepair, allowing lookbehind repairs.
Java regex simple lookbehind
…pair instead of Unit.
…handle nested groups' outward requirements.
Java regex nested assertions
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Added support for basic java regex lookaheads.
This PR introduces a check to
RegexGenes for which theRegexTypeisJVM, in which we check its randomized value after eachrandomize()for a match against its compiled java pattern. If the sampled value does not match we trigger repairs, which aim at repairing the assertions in the regex. These are repaired by sampling a value from the lookahead's internalDisjunctionListRxGeneand attempting to force that value into the following genes. This is safely done as we check if the genes can actually take that value or not before forcing them. We attempt these repairs a couple of times before giving up and throwing.We still do not support nested lookaheads (nested inside a group or nested within another lookahead) as the repair mechanism can not handle them yet. The current repairs this PR introduces can only repair regex genes that are on the same level as the lookahead itself (the
termsof aDisjunctionRxGene). This also does not yet properly handle multiple concatenated lookaheads as the current repair logic steps over the previous repairs if a new repair is triggered.Note: this PR adds a new gene
AssertionRxGeneas well as a new interfaceRxAbsorbablewhich is implemented by regex genes.