sneak
8f4ca5c73e
When a test leaves a timer running, jest force-stops the worker that ran the test, prints a warning, and the run still passes. Jest has no option that fails the run instead. Both test scripts in package.json now run jest through script/lib/jest.js. Jest runs inside that file's process, so its terminal output stays the same. The file exits 1 when jest printed that warning. Model: opus-5-5
41 lines
1.4 KiB
JavaScript
41 lines
1.4 KiB
JavaScript
// Runs jest with the arguments it is given, and fails the run when jest had to
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// force-stop the worker process that ran a test file. Jest itself only prints a
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// warning when that happens, and its run still passes. The warning means a test
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// left a timer or another open handle running. The test scripts in package.json
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// run jest through this file.
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//
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// Jest runs inside this process and writes to the terminal directly, so its
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// output looks the same as a plain jest run. This file only checks each write
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// to stderr for the warning below.
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"use strict";
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// The start of the warning that jest prints on stderr after it force-stops a
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// worker process.
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const WORKER_WARNING = "A worker process has failed to exit gracefully";
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let forceStopped = false;
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const writeStderr = process.stderr.write.bind(process.stderr);
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process.stderr.write = (chunk, ...rest) => {
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if (String(chunk).includes(WORKER_WARNING)) {
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forceStopped = true;
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}
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return writeStderr(chunk, ...rest);
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};
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// Runs after jest has finished, as the process exits.
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process.on("exit", () => {
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if (forceStopped) {
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console.error(
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"script/lib/jest.js: failing the run, because jest force-stopped " +
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"a worker process. A test left a timer or another open " +
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"handle running.",
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);
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process.exitCode = 1;
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}
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});
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// Jest's own command-line program. It reads its arguments from process.argv.
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require("jest/bin/jest");
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