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.
40 lines
1023 B
JavaScript
40 lines
1023 B
JavaScript
// @flow
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declare var pstr: Promise<string>;
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declare var pnum: Promise<number>;
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Promise.all([
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pstr,
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pnum,
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true, // non-Promise values passed through
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]).then((xs) => {
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// tuple information is preserved
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let [a,b,c] = xs;
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(a: number); // Error: string ~> number
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(b: boolean); // Error: number ~> boolean
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(c: string); // Error: boolean ~> string
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// array element type is (string | number | boolean)
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xs.forEach(x => {
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(x: void); // Errors: string ~> void, number ~> void, boolean ~> void
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});
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});
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// First argument is required
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Promise.all(); // Error: expected array instead of undefined (too few arguments)
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// Mis-typed arg
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Promise.all(0); // Error: expected array instead of number
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// Promise.all is a function
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(Promise.all : Function);
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// Promise.all supports iterables
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function test(val: Iterable<Promise<number>>) {
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const r: Promise<Array<number>> = Promise.all(val);
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}
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function tes2(val: Map<string, Promise<number>>) {
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const r: Promise<Array<number>> = Promise.all(val.values());
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}
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