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.
61 lines
1.6 KiB
JavaScript
61 lines
1.6 KiB
JavaScript
/* @providesModule This */
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function F() { this.x = 0; }
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F.prototype.m = function() { this.y = 0; }
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function foo(p:string) { }
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var o1 = new F(); // sets o1.x to 0
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o1.x = "";
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foo(o1.x); // ok by definite assignment
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var o2 = new F();
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o1.y = 0;
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o2.y = "";
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foo(o2.y); // setting o1.y to 0 has no effect on o2.y
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var o3 = new F();
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o3.m(); // sets o3.y to 0
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o3.y = "";
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foo(o3.y); // ok by definite assignment
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foo(o2.y); // setting o3.y to 0 has no effect on o2.y
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/*
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* this bindings:
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*/
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/* standard functions may rebind this */
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function f1() : number {
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return this.x
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}
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var f1_1 = f1.bind({x: 0})(); // ok
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var f1_2 : string = f1.bind({x: 0})(); // error, number -> string
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var f1_3 = f1.bind({x: ""})(); // error, string -> number
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// TODO make this error blame the call site, rather than the function body
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var f1_4 = f1(); // error, (global object).x
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/* arrow functions bind this at point of definition */
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/* top level arrow functions bind this to global object */
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var a1 = () => {
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return this.x
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}
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var ax = a1(); // error, (this:mixed).x
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/* nested arrows bind enclosing this (which may itself rebind) */
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function f2() : number {
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var a2 = () => { return this.x };
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return a2()
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}
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var f2_1 = f2.bind({x: 0})(); // ok
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var f2_2 : string = f2.bind({x: 0})(); // error, number -> string
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var f2_3 = f2.bind({x: ""})(); // error, string -> number
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// TODO make this error blame the call site, rather than the function body
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var f2_4 = f2(); // error, (global object).x
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(this: void);
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module.exports = true;
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