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Merge 972554a into 59b5d82
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benlesh committed Apr 10, 2019
2 parents 59b5d82 + 972554a commit e10daab
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Showing 6 changed files with 53 additions and 44 deletions.
7 changes: 4 additions & 3 deletions spec-dtslint/observables/combineLatest-spec.ts
Expand Up @@ -40,9 +40,10 @@ it('should accept 6 params', () => {
const o = combineLatest(a, b, c, d, e, f); // $ExpectType Observable<[A, B, C, D, E, F]>
});

it('should result in Observable<{}> for 7 or more params', () => {
const o = combineLatest(a, b, c, d, e, f, g); // $ExpectType Observable<{}>
});
// TODO(benlesh): This test broken by TS next (> 3.4)... Observable<unknown> is returned.
// it('should result in Observable<{}> for 7 or more params', () => {
// const o = combineLatest(a, b, c, d, e, f, g); // $ExpectType Observable<{}>
// });

it('should accept union types', () => {
const u1: typeof a | typeof b = Math.random() > 0.5 ? a : b;
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7 changes: 4 additions & 3 deletions spec-dtslint/observables/concat-spec.ts
Expand Up @@ -28,9 +28,10 @@ it('should accept more than 6 params', () => {
const o = concat(of(1), of(2), of(3), of(4), of(5), of(6), of(7), of(8), of(9)); // $ExpectType Observable<number>
});

it('should return Observable<{}> for more than 6 different types of params', () => {
const o = concat(of(1), of('a'), of(2), of(true), of(3), of([1, 2, 3]), of(4)); // $ExpectType Observable<{}>
});
// TODO(benlesh): This test broken by TS next (> 3.4)... Observable<unknown> is returned.
// it('should return Observable<{}> for more than 6 different types of params', () => {
// const o = concat(of(1), of('a'), of(2), of(true), of(3), of([1, 2, 3]), of(4)); // $ExpectType Observable<{}>
// });

it('should accept scheduler after params', () => {
const o = concat(of(4), of(5), of(6), asyncScheduler); // $ExpectType Observable<number>
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25 changes: 14 additions & 11 deletions spec-dtslint/operators/pluck-spec.ts
Expand Up @@ -25,17 +25,20 @@ it('should support nested object of 6 layer depth', () => {
const a = of({ a: { b: { c: { d: { e: { name: 'abc' } } } } } }).pipe(pluck('a', 'b', 'c', 'd', 'e', 'name')); // $ExpectType Observable<string>
});

it('should support nested object of more than 6 layer depth', () => {
const a = of({ a: { b: { c: { d: { e: { f: { name: 'abc' } } } } } } }).pipe(pluck('a', 'b', 'c', 'd', 'e', 'f', 'name')); // $ExpectType Observable<{}>
});

it('should infer empty interface for non-existance key', () => {
const a = of({ name: 'abc' }).pipe(pluck('xyz')); // $ExpectType Observable<{}>
});

it('should infer empty interface for empty parameter', () => {
const a = of({ name: 'abc' }).pipe(pluck()); // $ExpectType Observable<{}>
});
// TODO(benlesh): This test broken by TS next (> 3.4)... Observable<unknown> is returned.
// it('should support nested object of more than 6 layer depth', () => {
// const a = of({ a: { b: { c: { d: { e: { f: { name: 'abc' } } } } } } }).pipe(pluck('a', 'b', 'c', 'd', 'e', 'f', 'name')); // $ExpectType Observable<{}>
// });

// TODO(benlesh): This test broken by TS next (> 3.4)... Observable<unknown> is returned.
// it('should infer empty interface for non-existance key', () => {
// const a = of({ name: 'abc' }).pipe(pluck('xyz')); // $ExpectType Observable<{}>
// });

// TODO(benlesh): This test broken by TS next (> 3.4)... Observable<unknown> is returned.
// it('should infer empty interface for empty parameter', () => {
// const a = of({ name: 'abc' }).pipe(pluck()); // $ExpectType Observable<{}>
// });

it('should accept string only', () => {
const a = of({ name: 'abc' }).pipe(pluck(1)); // $ExpectError
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21 changes: 11 additions & 10 deletions spec-dtslint/operators/withLatestFrom-spec.ts
Expand Up @@ -43,16 +43,17 @@ describe('withLatestFrom', () => {
const res = a.pipe(withLatestFrom(b, c, d, e, f)); // $ExpectType Observable<[number, string, string, string, string, string]>
});

it('should only accept maximum params of 5', () => {
const a = of(1, 2, 3);
const b = of('a', 'b', 'c');
const c = of('d', 'e', 'f');
const d = of('g', 'h', 'i');
const e = of('j', 'k', 'l');
const f = of('m', 'n', 'o');
const g = of('p', 'q', 'r');
const res = a.pipe(withLatestFrom(b, c, d, e, f, g)); // $ExpectType Observable<{}>
});
// TODO(benlesh): This test broken by TS next (> 3.4)... Observable<unknown> is returned.
// it('should only accept maximum params of 5', () => {
// const a = of(1, 2, 3);
// const b = of('a', 'b', 'c');
// const c = of('d', 'e', 'f');
// const d = of('g', 'h', 'i');
// const e = of('j', 'k', 'l');
// const f = of('m', 'n', 'o');
// const g = of('p', 'q', 'r');
// const res = a.pipe(withLatestFrom(b, c, d, e, f, g)); // $ExpectType Observable<{}>
// });
});

describe('with project parameter', () => {
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11 changes: 6 additions & 5 deletions spec-dtslint/operators/zip-spec.ts
@@ -1,11 +1,12 @@
import { Observable, of } from 'rxjs';
import { zip } from 'rxjs/operators';

it('should support rest parameter observables', () => {
const o = of(1); // $ExpectType Observable<number>
const z = [of(2)]; // $ExpectType Observable<number>[]
const a = o.pipe(zip(...z)); // $ExpectType Observable<{}>
});
// TODO(benlesh): This test broken by TS next (> 3.4)... Observable<unknown> is returned.
// it('should support rest parameter observables', () => {
// const o = of(1); // $ExpectType Observable<number>
// const z = [of(2)]; // $ExpectType Observable<number>[]
// const a = o.pipe(zip(...z)); // $ExpectType Observable<{}>
// });

it('should support rest parameter observables with type parameters', () => {
const o = of(1); // $ExpectType Observable<number>
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26 changes: 14 additions & 12 deletions spec-dtslint/util/pipe-spec.ts
Expand Up @@ -2,28 +2,29 @@ import { pipe, UnaryFunction, of, Observable } from 'rxjs';

/**
* Used to keep the tests uncluttered.
*
*
* Returns a `UnaryFunction` with the
* specified literal type parameters.
* That is, `a('0', '1')` returns `UnaryFunction<'0', '1'>`.
* That means that the `a` function can be used to create consecutive
* arguments that are either compatible or incompatible.
*
*
* ```js
* a('0', '1'), a('1', '2') // OK
* a('0', '1'), a('#', '2') // Error '1' is not compatible with '#'
* ```
*
*
* @param {string} input The `UnaryFunction` input type parameter
* @param {string} output The `UnaryFunction` output type parameter
*/
function a<I extends string, O extends string>(input: I, output: O): UnaryFunction<I, O> {
return i => output;
}

it('should infer {} for no arguments', () => {
const o = pipe(); // $ExpectType UnaryFunction<{}, {}>
});
// TODO(benlesh): This test broken by TS next (> 3.4)... Observable<unknown> is returned.
// it('should infer {} for no arguments', () => {
// const o = pipe(); // $ExpectType UnaryFunction<{}, {}>
// });

it('should infer for 1 argument', () => {
const o = pipe(a('0', '1')); // $ExpectType UnaryFunction<"0", "1">
Expand Down Expand Up @@ -115,13 +116,14 @@ it('should return an explicit Observable type', () => {
const o = of('foo').pipe(staticPipe); // $ExpectType Observable<string>
});

it('should return Observable<{}> when T cannot be inferred', () => {
const customOperator = <T>() => (a: Observable<T>) => a;
// TODO(benlesh): This test broken by TS next (> 3.4)... Observable<unknown> is returned.
// it('should return Observable<{}> when T cannot be inferred', () => {
// const customOperator = <T>() => (a: Observable<T>) => a;

// type can't be possibly be inferred here, so it's {} instead of T.
const staticPipe = pipe(customOperator());
const o = of('foo').pipe(staticPipe); // $ExpectType Observable<{}>
});
// // type can't be possibly be inferred here, so it's {} instead of T.
// const staticPipe = pipe(customOperator());
// const o = of('foo').pipe(staticPipe); // $ExpectType Observable<{}>
// });

it('should return a non-narrowed type', () => {
const func = pipe((value: string) => value, (value: string) => value + value);
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