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Learn how Gatling’s Expression Language lets you pull tokens, IDs, or other dynamic data from HTTP responses and reuse them in later requests—making your load tests realistic and maintainable.
Learn how to evaluate Unified Expression Language strings with Juel in plain Java, cache compiled expressions safely, and avoid javax.el versus jakarta.el import errors.
Goal: confirm whether an application-registered custom ELResolver runs before or after the standard implicit-object resolvers when the expression base is null, and whether that behavior changes across the javax.el to jakarta.el compatibility boundary. Resolver chain position and null-base handling are implementation-dependent. Package migration can alter ser
Gatling feeder expression language evaluates column values through EL expressions; when a feeder column contains a null, the expression may silently default to an empty string, propagating unexpected request parameters without explicit indication. This behavior varies by feeder implementation: a CSV feeder with missing rows treats the value as null, while a
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