Files
test-repo/tests/flow/object_api/object_keys.js
T
Simon Lydell dc93bdc983 Sync the Flow tests (#1163)
* Extract custom tests from tests/flow/

Approach:

1. Remove all .js files in tests/flow except .snap.js files.
2. Copy over all .js files from tests/ in the flow repo.
3. Go through the diff looking for deletions.
   - It was easy to see which deletions were due to changes in the tests
     due to updates in the flow repo.
   - For the rest of the deletions, I used `git blame` to verify that
     they had been added by us since the flow tests were copied over.

This makes tests/flow/ simply a copy of the tests from the flow repo,
making it easier to sync with the upstream flow tests in the future.

* Add a script for syncing the flow tests

* Sync the flow tests
2017-04-08 07:52:38 -07:00

33 lines
756 B
JavaScript

/* @flow */
var sealed = {one: 'one', two: 'two'};
(Object.keys(sealed): Array<'one'|'two'>);
(Object.keys(sealed): void); // error, Array<string>
var unsealed = {};
Object.keys(unsealed).forEach(k => {
(k : number) // error: string ~> number
});
var dict: { [k: number]: string } = {};
Object.keys(dict).forEach(k => {
(k : number) // error: string ~> number
});
var any: Object = {};
(Object.keys(any): Array<number>); // error, Array<string>
class Foo {
prop: string;
foo() {}
}
// constructor and foo not enumerable
(Object.keys(new Foo()): Array<'error'>); // error: prop ~> error
class Bar extends Foo {
bar_prop: string;
bar() {}
}
// only own enumerable props
(Object.keys(new Bar()): Array<'error'>); // error: bar_prop ~> error