Answer

Merging Reports with Multiple Shards in Playwright

Unfortunately, the HTML reporter in Playwright doesn't support merging reports from multiple shards. But don't worry, there are other ways to get around this.

Using the JSON Reporter

First, you can use the JSON reporter. This reporter produces a JSON object with all the test run information. Here's how you can write the JSON to a file:

PLAYWRIGHT_JSON_OUTPUT_NAME=results.json npx playwright test --reporter=json

This command will generate a JSON file with your test results.

Using the JUnit Reporter

Alternatively, you can use the JUnit reporter. This reporter produces a JUnit-style XML report. Here's how you can write the report to an XML file:

PLAYWRIGHT_JUNIT_OUTPUT_NAME=results.xml npx playwright test --reporter=junit

This command will generate an XML file with your test results in JUnit format.

Configuring Reporters in a Configuration File

If you prefer to configure reporters in a configuration file (playwright.config.ts), you can specify options directly for each reporter type. Here's how you can configure the JSON reporter:

import { defineConfig } from '@playwright/test';

export default defineConfig({
  reporter: [['json', { outputFile: 'results.json' }]],
});

And here's how you can configure the JUnit reporter:

import { defineConfig } from '@playwright/test';

export default defineConfig({
  reporter: [['junit', { outputFile: 'results.xml' }]],
});

These configurations will generate a JSON file and an XML file respectively, containing all the information about your tests.

To merge these reports into a single report, you'll need to implement a custom solution or explore alternative options outside of Playwright's built-in reporters.