AST Node Conditional Tester

The `ast-test` library provides a utility for conditionally evaluating individual nodes within an Abstract Syntax Tree (AST) against a set of user-defined rules. It operates on ASTs conforming to the ESTree specification, typically generated by parsers such as `esprima` or `@babel/parser`. Its core functionality revolves around a `test` function that evaluates a given AST node against a rule object. This object maps AST node types (e.g., `AssignmentExpression`, `Expression`) to predicate functions, which return `true` if the node matches the condition and `false` otherwise. Currently at version 1.1.1, the package had its last release in 2017. Given its age and complete lack of recent updates or maintenance, its release cadence is dormant, indicating it is an abandoned project. It offers a simple, rule-based approach for selective AST node inspection, which can be useful in niche scenarios for static analysis, linting, or identifying specific code patterns without full AST traversal utilities.