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Add is.asyncIterable

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This commit is contained in:
Artur 2018-07-08 15:37:27 +03:00
parent f81976aa44
commit 2dbf247fc0
2 changed files with 16 additions and 9 deletions
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2
source/index.ts
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@ -136,7 +136,7 @@ namespace is { // tslint:disable-line:no-namespace
export const nullOrUndefined = (value: any): value is null | undefined => null_(value) || undefined(value);
export const object = (value: any): value is object => !nullOrUndefined(value) && (function_(value) || isObject(value));
export const iterable = (value: any): value is IterableIterator<any> => !nullOrUndefined(value) && function_(value[Symbol.iterator]);
export const asyncIterable = (value: any): value is AsyncIterableIterator<any> => !nullOrUndefined(Symbol.asyncIterator) && function_(value[Symbol.asyncIterator]);
export const asyncIterable = (value: any): value is AsyncIterableIterator<any> => !nullOrUndefined(value) && function_(value[Symbol.asyncIterator]);
export const generator = (value: any): value is Generator => iterable(value) && function_(value.next) && function_(value.throw);
export const nativePromise = (value: any): value is Promise<any> =>

23
source/tests/test.ts
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@ -455,14 +455,6 @@ if (isNode8orHigher) {
});*/
}
if (isNode10orHigher) {
test('is.asyncIterable', t => {
t.true(m.asyncIterable(Object.create({
[Symbol.asyncIterator]: () => {} // tslint:disable-line:no-empty
})));
});
}
test('is.generator', t => {
testType(t, 'generator');
});
@ -612,6 +604,21 @@ test('is.iterable', t => {
t.false(m.iterable({}));
});
if (isNode10orHigher) {
test('is.asyncIterable', t => {
t.true(m.asyncIterable({
[Symbol.asyncIterator]: () => {} // tslint:disable-line:no-empty
}));
t.false(m.asyncIterable(null));
t.false(m.asyncIterable(undefined));
t.false(m.asyncIterable(0));
t.false(m.asyncIterable(NaN));
t.false(m.asyncIterable(Infinity));
t.false(m.asyncIterable({}));
});
}
test('is.class', t => {
class Foo {} // tslint:disable-line
const classDeclarations = [