101 lines
3.8 KiB
TypeScript
101 lines
3.8 KiB
TypeScript
// Copyright 2016-2018, Pulumi Corporation.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import { AsyncIterable } from "@pulumi/query/interfaces";
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import * as assert from "assert";
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import { PushableAsyncIterable } from "../../runtime/asyncIterableUtil";
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import { asyncTest } from "../util";
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async function enumerate<T>(ts: AsyncIterable<T>): Promise<T[]> {
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const tss: T[] = [];
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for await (const n of ts) {
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tss.push(n);
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}
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return tss;
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}
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describe("PushableAsyncIterable", () => {
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it(
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"correctly produces empty sequence",
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asyncTest(async () => {
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const queue = new PushableAsyncIterable<number>();
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queue.complete();
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assert.deepStrictEqual(await enumerate(queue), []);
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}),
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);
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it(
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"correctly produces singleton sequence",
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asyncTest(async () => {
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const queue = new PushableAsyncIterable<number>();
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queue.push(1);
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queue.complete();
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assert.deepStrictEqual(await enumerate(queue), [1]);
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}),
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);
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it(
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"correctly produces multiple sequence",
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asyncTest(async () => {
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const queue = new PushableAsyncIterable<number>();
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queue.push(1);
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queue.push(2);
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queue.push(3);
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queue.complete();
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assert.deepStrictEqual(await enumerate(queue), [1, 2, 3]);
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}),
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);
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it(
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"correctly terminates outstanding operations afte complete",
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asyncTest(async () => {
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const queue = new PushableAsyncIterable<number>();
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const queueIter = queue[Symbol.asyncIterator]();
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const terminates = new Promise(async resolve => {
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assert.deepStrictEqual(await queueIter.next(), { value: undefined, done: true });
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assert.deepStrictEqual(await queueIter.next(), { value: undefined, done: true });
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assert.deepStrictEqual(await queueIter.next(), { value: undefined, done: true });
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resolve();
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});
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queue.complete();
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await terminates;
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assert.deepStrictEqual(await queueIter.next(), { value: undefined, done: true });
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}),
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);
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it(
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"correctly interleaves operations",
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asyncTest(async () => {
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const queue = new PushableAsyncIterable<number>();
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const queueIter = queue[Symbol.asyncIterator]();
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queue.push(1);
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queue.push(2);
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assert.deepStrictEqual(await queueIter.next(), { value: 1, done: false });
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queue.push(3);
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assert.deepStrictEqual(await queueIter.next(), { value: 2, done: false });
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assert.deepStrictEqual(await queueIter.next(), { value: 3, done: false });
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queue.push(4);
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queue.push(5);
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queue.push(6);
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queue.push(7);
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assert.deepStrictEqual(await queueIter.next(), { value: 4, done: false });
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assert.deepStrictEqual(await queueIter.next(), { value: 5, done: false });
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assert.deepStrictEqual(await queueIter.next(), { value: 6, done: false });
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assert.deepStrictEqual(await queueIter.next(), { value: 7, done: false });
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queue.complete();
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assert.deepStrictEqual(await queueIter.next(), { value: undefined, done: true });
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}),
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);
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});
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