great-expectations

Write assertions using great-expectations — a TypeScript matcher library that builds rich, human-readable descriptions of values. Assertions are composed from a MatchEvaluator (`is`, `throws`, `resolvesTo`, `rejectsWith`, `eventually`) and a `Matcher<T>`. TRIGGER when code imports `great-expectations`; when a user asks to write, modify, review, or debug assertions in a project using great-expectations; or when discussing `expect`, `is`, `equalTo`, `stringContaining`, `arrayWith`, `objectWith`, `valueWhere`, `Matcher`, `MatchResult`, `Valid`, `Invalid`, or custom matcher design.