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https://github.com/clusterio/clusterio.git
synced 2026-11-11 23:04:52 +09:00
Hornwitser
5dcaca4d0b
Migrate the usage of CommonJS specific code and imports to ESM. Roughly summarised this: - Changes all require() calls to import statement or expressions. - Changes usage of module.exports to export statements. - Replaces require.resolve with import.meta.resolve. - Replaces conditional imports with conditional subpath imports. - Replaces module === require.main with import.meta.main. - Adds the full filename with extention to all relative imports. - Changes all usage of __dirname and __filename to their import.meta equivalents. - Sets "type": "module" in package.json files. - Removes usage of "use strict". - Adds .ts an an alias of .js for the webpack build. Due to differences in how require and import resolves files the plugin entrypoints will have to include the filename and extension after this migration in order to work.
57 lines
1.9 KiB
JavaScript
57 lines
1.9 KiB
JavaScript
import assert from "node:assert/strict";
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import { ExponentialBackoff } from "@clusterio/lib";
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describe("lib/ExponentialBackoff", function() {
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describe("class ExponentialBackoff", function() {
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it("should give a delay", function() {
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let backoff = new ExponentialBackoff();
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assert.equal(typeof backoff.delay(), "number");
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});
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it("should give exponentially increasing delays", function() {
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let buckets = [];
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for (let i = 0; i < 100; i++) {
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let backoff = new ExponentialBackoff({ base: 1, max: 1024 });
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for (let j = 0; j < 10; j++) {
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buckets[j] = (buckets[j] || 0) + backoff.delay();
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}
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}
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for (let i = 0; i < 10; i++) {
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let average = buckets[i] / 100 / 1000; // Divide by 1000 for ms to s conversion.
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let scale = 2 ** i;
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// Eyeball statistics told me that a deviation of about 40%
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// of the expected average would be 6 standard deviations
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// for a sum of 100 values and thus highly improbable.
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assert(
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average / scale > 0.6 && average / scale < 1.4,
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`Expected average to be in range ${scale * 0.6} to ${scale * 1.4} but got ${average}`
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);
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}
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});
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it("should not exceed max value", function() {
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for (let max of [0.1, 0.5, 1, 2, 50, 100, 1000, 100000]) {
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let backoff = new ExponentialBackoff({ base: 1, max });
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for (let j = 0; j < 100; j++) {
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let value = backoff.delay() / 1000; // Divide by 1000 for ms to s conversion
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assert(value <= max, `delay returned a value greater than max: ${value} > ${max}`);
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}
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}
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});
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it("should reset if enough time passes", function() {
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let backoff = new ExponentialBackoff({ reset: 100 });
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backoff.delay();
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assert.equal(backoff._exp, 1);
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backoff._lastInvocationTimeMs = Date.now() - 99 * 1000;
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backoff.delay();
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assert.equal(backoff._exp, 2);
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backoff._lastInvocationTimeMs = Date.now() - 101 * 1000;
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backoff.delay();
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assert.equal(backoff._exp, 1);
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});
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});
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});
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