66 lines
2.0 KiB
TypeScript
66 lines
2.0 KiB
TypeScript
/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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import * as assert from 'assert';
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import { Cache } from 'vs/base/common/cache';
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import { timeout } from 'vs/base/common/async';
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suite('Cache', () => {
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test('simple value', () => {
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let counter = 0;
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const cache = new Cache(_ => Promise.resolve(counter++));
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return cache.get().promise
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.then(c => assert.equal(c, 0), () => assert.fail('Unexpected assertion error'))
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.then(() => cache.get().promise)
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.then(c => assert.equal(c, 0), () => assert.fail('Unexpected assertion error'));
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});
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test('simple error', () => {
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let counter = 0;
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const cache = new Cache(_ => Promise.reject(new Error(String(counter++))));
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return cache.get().promise
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.then(() => assert.fail('Unexpected assertion error'), err => assert.equal(err.message, 0))
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.then(() => cache.get().promise)
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.then(() => assert.fail('Unexpected assertion error'), err => assert.equal(err.message, 0));
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});
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test('should retry cancellations', () => {
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let counter1 = 0, counter2 = 0;
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const cache = new Cache(token => {
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counter1++;
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return Promise.resolve(timeout(2, token).then(() => counter2++));
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});
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assert.equal(counter1, 0);
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assert.equal(counter2, 0);
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let result = cache.get();
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assert.equal(counter1, 1);
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assert.equal(counter2, 0);
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result.promise.then(undefined, () => assert(true));
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result.dispose();
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assert.equal(counter1, 1);
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assert.equal(counter2, 0);
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result = cache.get();
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assert.equal(counter1, 2);
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assert.equal(counter2, 0);
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return result.promise
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.then(c => {
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assert.equal(counter1, 2);
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assert.equal(counter2, 1);
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})
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.then(() => cache.get().promise)
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.then(c => {
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assert.equal(counter1, 2);
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assert.equal(counter2, 1);
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});
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});
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});
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