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.
58 lines
1.6 KiB
JavaScript
58 lines
1.6 KiB
JavaScript
/* @flow */
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var x : {[key: string]: string} = {};
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var y : {[key: string]: number} = x; // 2 errors, number !~> string & vice versa
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var z : {[key: number]: string} = x; // 2 errors, string !~> number & vice versa
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var a : {[key: string]: ?string} = {};
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var b : {[key: string]: string} = a; // 2 errors (null & undefined)
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var c : {[key: string]: ?string} = b; // 2 errors, since c['x'] = null updates b
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// 2 errors (number !~> string, string !~> number)
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function foo0(x: Array<{[key: string]: number}>): Array<{[key: string]: string}> {
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return x;
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}
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// error, fooBar:string !~> number (x's dictionary)
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function foo1(
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x: Array<{[key: string]: number}>
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): Array<{[key: string]: number, fooBar: string}> {
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return x;
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}
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function foo2(
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x: Array<{[key: string]: mixed}>
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): Array<{[key: string]: mixed, fooBar: string}> {
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x[0].fooBar = 123; // OK, since number ~> mixed (x elem's dictionary)
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return x; // error: mixed ~> string
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}
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// OK, since we assume dictionaries have every key
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function foo3(x: {[key: string]: number}): {foo: number} {
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return x;
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}
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// error: foo can't exist in x
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function foo4(x: {[key: string]: number}): {[key: string]: number, foo: string} {
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return x;
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}
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// error, some prop in x could be incompatible (covariance)
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function foo5(x: Array<{[key: string]: number}>): Array<{foo: number}> {
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return x;
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}
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// error, some prop in return could be incompatible
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function foo6(x: Array<{foo: number}>): Array<{[key: string]: number}> {
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return x;
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}
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function foo7(x: {bar: string, [key: string]: number}) {
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(x.bar: string);
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}
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function foo8(x: {[key: string]: number}) {
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(x.foo: string); // error
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(x.foo: number);
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}
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