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buildWorkerBase bundles with esbuild code splitting into one private directory: the entry and its static chunks load at each fork, a lazily imported module and the packages it imports only when imported. @earendil-works/chord/workers/child exports the worker's side (workerMain, processLock) without esbuild.
28 lines
1.3 KiB
TypeScript
28 lines
1.3 KiB
TypeScript
// Tests of the worker's side as its own entry point (`@earendil-works/chord/workers/child`): importing it loads no
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// esbuild, so a forked worker does not pay for the server's worker base build.
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import { execFileSync } from "node:child_process";
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import { fileURLToPath } from "node:url";
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import { describe, expect, it } from "vitest";
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describe("the child entry's imports", () => {
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it("loads no esbuild: a worker importing workerMain and processLock never imports it", () => {
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const child = fileURLToPath(new URL("../../../src/node/workers/child.ts", import.meta.url));
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// A hook refusing esbuild, then the child entry imported.
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const script = [
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'import { registerHooks } from "node:module";',
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"registerHooks({ resolve(specifier, context, next) {",
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' if (specifier === "esbuild") throw new Error("esbuild imported");',
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" return next(specifier, context);",
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"} });",
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`const { processLock, workerMain } = await import(${JSON.stringify(child)});`,
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"console.log(typeof processLock, typeof workerMain);",
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].join("\n");
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const output = execFileSync(
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process.execPath,
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["--experimental-strip-types", "--no-warnings", "--input-type=module", "--eval", script],
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{ encoding: "utf8" },
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);
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expect(output.trim()).toBe("function function");
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});
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});
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