EventRunner7

How to write and run tests for EventScript/EventRunner — parser tests, expression eval tests, and full integration tests. Covers the three test tiers, the builtin-availability problem (setupFuns), how to use ER.compileAST vs er.eval, and common pitfalls. USE FOR: writing new tests, diagnosing "Undefined variable" for builtins, choosing the right test tier, understanding what's a valid EventScript statement vs expression.