cherry-pick(#26413): fix(merge): allow reports with same name as input (#26417)

Author: yury-s

packages/playwright-test/src/reporters/merge.ts

@@ -110,15 +110,17 @@ async function extractAndParseReports(dir: string, shardFiles: string[], interna
   const shardEvents: { file: string, localPath: string, metadata: BlobReportMetadata, parsedEvents: JsonEvent[] }[] = [];
   await fs.promises.mkdir(path.join(dir, 'resources'), { recursive: true });
 
+  const reportNames = new UniqueFileNameGenerator();
   for (const file of shardFiles) {
     const absolutePath = path.join(dir, file);
     printStatus(`extracting: ${relativeFilePath(absolutePath)}`);
     const zipFile = new ZipFile(absolutePath);
     const entryNames = await zipFile.entries();
     for (const entryName of entryNames.sort()) {
-      const fileName = path.join(dir, entryName);
+      let fileName = path.join(dir, entryName);
       const content = await zipFile.read(entryName);
       if (entryName.endsWith('.jsonl')) {
+        fileName = reportNames.makeUnique(fileName);
         const parsedEvents = parseCommonEvents(content);
         // Passing reviver to JSON.parse doesn't work, as the original strings
         // keep beeing used. To work around that we traverse the parsed events
@@ -285,6 +287,27 @@ function printStatusToStdout(message: string) {
   process.stdout.write(`${message}\n`);
 }
 
+class UniqueFileNameGenerator {
+  private _usedNames = new Set<string>();
+
+  makeUnique(name: string): string {
+    if (!this._usedNames.has(name)) {
+      this._usedNames.add(name);
+      return name;
+    }
+    const extension = path.extname(name);
+    name = name.substring(0, name.length - extension.length);
+    let index = 0;
+    while (true) {
+      const candidate = `${name}-${++index}${extension}`;
+      if (!this._usedNames.has(candidate)) {
+        this._usedNames.add(candidate);
+        return candidate;
+      }
+    }
+  }
+}
+
 class IdsPatcher {
   constructor(private _stringPool: StringInternPool, private _reportName: string | undefined, private _salt: string) {
   }

tests/playwright-test/reporter-blob.spec.ts

@@ -1324,3 +1324,51 @@ test('merge-reports should throw if report version is from the future', async ({
   expect(output).toContain(`Error: Blob report report-2.zip was created with a newer version of Playwright.`);
 
 });
+
+test('should merge blob reports with same name', async ({ runInlineTest, mergeReports, showReport, page }) => {
+  const files = {
+    'playwright.config.ts': `
+      module.exports = {
+        retries: 1,
+        reporter: 'blob'
+      };
+    `,
+    'a.test.js': `
+      import { test, expect } from '@playwright/test';
+      test('math 1', async ({}) => {
+        expect(1 + 1).toBe(2);
+      });
+      test('failing 1', async ({}) => {
+        expect(1).toBe(2);
+      });
+      test('flaky 1', async ({}) => {
+        expect(test.info().retry).toBe(1);
+      });
+      test.skip('skipped 1', async ({}) => {});
+    `,
+    'b.test.js': `
+      import { test, expect } from '@playwright/test';
+      test('math 2', async ({}) => {
+        expect(1 + 1).toBe(2);
+      });
+      test('failing 2', async ({}) => {
+        expect(1).toBe(2);
+      });
+      test.skip('skipped 2', async ({}) => {});
+    `
+  };
+  await runInlineTest(files);
+  const reportZip = test.info().outputPath('blob-report', 'report.zip');
+  const allReportsDir = test.info().outputPath('all-blob-reports');
+  await fs.promises.cp(reportZip, path.join(allReportsDir, 'report-1.zip'));
+  await fs.promises.cp(reportZip, path.join(allReportsDir, 'report-2.zip'));
+
+  const { exitCode } = await mergeReports(allReportsDir, { 'PW_TEST_HTML_REPORT_OPEN': 'never' }, { additionalArgs: ['--reporter', 'html'] });
+  expect(exitCode).toBe(0);
+  await showReport();
+  await expect(page.locator('.subnav-item:has-text("All") .counter')).toHaveText('14');
+  await expect(page.locator('.subnav-item:has-text("Passed") .counter')).toHaveText('4');
+  await expect(page.locator('.subnav-item:has-text("Failed") .counter')).toHaveText('4');
+  await expect(page.locator('.subnav-item:has-text("Flaky") .counter')).toHaveText('2');
+  await expect(page.locator('.subnav-item:has-text("Skipped") .counter')).toHaveText('4');
+});