element-web/playwright/stale-screenshot-reporter.ts
David Langley 491f0cd08a
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2024-09-09 13:57:16 +00:00

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TypeScript

/*
Copyright 2024 New Vector Ltd.
Copyright 2024 The Matrix.org Foundation C.I.C.
SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
Please see LICENSE files in the repository root for full details.
*/
/**
* Test reporter which compares the reported screenshots vs those on disk to find stale screenshots
* Only intended to run from within GitHub Actions
*/
import path from "node:path";
import { glob } from "glob";
import type { Reporter, TestCase } from "@playwright/test/reporter";
const snapshotRoot = path.join(__dirname, "snapshots");
class StaleScreenshotReporter implements Reporter {
private screenshots = new Set<string>();
private success = true;
public onTestEnd(test: TestCase): void {
for (const annotation of test.annotations) {
if (annotation.type === "_screenshot") {
this.screenshots.add(annotation.description);
}
}
}
private error(msg: string, file: string) {
if (process.env.GITHUB_ACTIONS) {
console.log(`::error file=${file}::${msg}`);
}
console.error(msg, file);
this.success = false;
}
public async onExit(): Promise<void> {
const screenshotFiles = new Set(await glob(`**/*.png`, { cwd: snapshotRoot }));
for (const screenshot of screenshotFiles) {
if (screenshot.split("-").at(-1) !== "linux.png") {
this.error(
"Found screenshot belonging to different platform, this should not be checked in",
screenshot,
);
}
}
for (const screenshot of this.screenshots) {
screenshotFiles.delete(screenshot);
}
if (screenshotFiles.size > 0) {
for (const screenshot of screenshotFiles) {
this.error("Stale screenshot file", screenshot);
}
}
if (!this.success) {
process.exit(1);
}
}
}
export default StaleScreenshotReporter;