Christopher Chedeau
cf45afba61
- This brings in the flow test suite that contains a ton of JavaScript parsing edge cases - This creates snapshot tests using the pretty printer for all of them - If uncomment `RUN_AST_TESTS` line in `tests/run_specs.js`, it checks ast(pretty_print(x)) == ast(x). Right now, "178 failed, 197 passed, 375 of 377 total". So half of the tests are not passing, most of them are crashes and many of the rest are subtle issues.
30 lines
642 B
JavaScript
30 lines
642 B
JavaScript
/**
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* test handling of const params
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* - reassignment prohibited
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* - durable refinements
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*
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* Currently gated in .flowconfig:
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*
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* [options]
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* experimental.const_params
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*
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* Syntax to follow
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*
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* @flow
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*/
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function cannot_reassign(x: string) {
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x = "hey"; // error, const param cannot be reassigned
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}
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// Note: const params use the same machinery as explicit
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// const bindings, which are tested more extensively elsewhere.
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// Here we're just making sure the machinery is hooked up.
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//
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function durable_refi(x: ?number) {
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if (x) {
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// ok: if x is truthy here, it's truthy everywhere
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return () => { var y:number = x; };
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}
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}
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