chore: migrate builtin reporters to ReporterV2 (#23985)

This allows builtin reporters to handle stdio between onConfigure and
onBegin.

Fixes #23539.

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

@@ -16,9 +16,10 @@
 
 import { colors, ms as milliseconds, parseStackTraceLine } from 'playwright-core/lib/utilsBundle';
 import path from 'path';
-import type { FullConfig, TestCase, Suite, TestResult, TestError, FullResult, TestStep, Location, Reporter } from '../../types/testReporter';
+import type { FullConfig, TestCase, Suite, TestResult, TestError, FullResult, TestStep, Location } from '../../types/testReporter';
 import type { SuitePrivate } from '../../types/reporterPrivate';
 import { monotonicTime } from 'playwright-core/lib/utils';
+import type { ReporterV2 } from './reporterV2';
 export type TestResultOutput = { chunk: string | Buffer, type: 'stdout' | 'stderr' };
 export const kOutputSymbol = Symbol('output');
 
@@ -43,7 +44,7 @@ type TestSummary = {
   fatalErrors: TestError[];
 };
 
-export class BaseReporter implements Reporter {
+export class BaseReporter implements ReporterV2 {
   duration = 0;
   config!: FullConfig;
   suite!: Suite;
@@ -60,9 +61,16 @@ export class BaseReporter implements Reporter {
     this._ttyWidthForTest = parseInt(process.env.PWTEST_TTY_WIDTH || '', 10);
   }
 
-  onBegin(config: FullConfig, suite: Suite) {
-    this.monotonicStartTime = monotonicTime();
+  version(): 'v2' {
+    return 'v2';
+  }
+
+  onConfigure(config: FullConfig) {
     this.config = config;
+  }
+
+  onBegin(suite: Suite) {
+    this.monotonicStartTime = monotonicTime();
     this.suite = suite;
     this.totalTestCount = suite.allTests().length;
   }
@@ -82,6 +90,9 @@ export class BaseReporter implements Reporter {
     (result as any)[kOutputSymbol].push(output);
   }
 
+  onTestBegin(test: TestCase, result: TestResult): void {
+  }
+
   onTestEnd(test: TestCase, result: TestResult) {
     // Ignore any tests that are run in parallel.
     for (let suite: Suite | undefined = test.parent; suite; suite = suite.parent) {
@@ -104,6 +115,19 @@ export class BaseReporter implements Reporter {
     this.result = result;
   }
 
+  onStepBegin(test: TestCase, result: TestResult, step: TestStep): void {
+  }
+
+  onStepEnd(test: TestCase, result: TestResult, step: TestStep): void {
+  }
+
+  async onExit() {
+  }
+
+  printsToStdio() {
+    return true;
+  }
+
   protected ttyWidth() {
     return this._ttyWidthForTest || process.stdout.columns || 0;
   }

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

@@ -16,17 +16,17 @@
 
 import { colors } from 'playwright-core/lib/utilsBundle';
 import { BaseReporter, formatError } from './base';
-import type { FullResult, TestCase, TestResult, FullConfig, Suite, TestError } from '../../types/testReporter';
+import type { FullResult, TestCase, TestResult, Suite, TestError } from '../../types/testReporter';
 
 class DotReporter extends BaseReporter {
   private _counter = 0;
 
-  printsToStdio() {
+  override printsToStdio() {
     return true;
   }
 
-  override onBegin(config: FullConfig, suite: Suite) {
-    super.onBegin(config, suite);
+  override onBegin(suite: Suite) {
+    super.onBegin(suite);
     console.log(this.generateStartingMessage());
   }
 

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

@@ -14,9 +14,50 @@
  * limitations under the License.
  */
 
-import type { Reporter } from '../../types/testReporter';
+import type { ReporterV2 } from './reporterV2';
+import type { FullConfig, TestCase, TestError, TestResult, FullResult, TestStep, Suite } from '../../types/testReporter';
 
-class EmptyReporter implements Reporter {
+class EmptyReporter implements ReporterV2 {
+  onConfigure(config: FullConfig) {
+  }
+
+  onBegin(suite: Suite) {
+  }
+
+  onTestBegin(test: TestCase, result: TestResult) {
+  }
+
+  onStdOut(chunk: string | Buffer, test?: TestCase, result?: TestResult) {
+  }
+
+  onStdErr(chunk: string | Buffer, test?: TestCase, result?: TestResult) {
+  }
+
+  onTestEnd(test: TestCase, result: TestResult) {
+  }
+
+  async onEnd(result: FullResult) {
+  }
+
+  async onExit() {
+  }
+
+  onError(error: TestError) {
+  }
+
+  onStepBegin(test: TestCase, result: TestResult, step: TestStep) {
+  }
+
+  onStepEnd(test: TestCase, result: TestResult, step: TestStep) {
+  }
+
+  printsToStdio() {
+    return false;
+  }
+
+  version(): 'v2' {
+    return 'v2';
+  }
 }
 
 export default EmptyReporter;

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

@@ -59,7 +59,7 @@ class GitHubLogger {
 export class GitHubReporter extends BaseReporter {
   githubLogger = new GitHubLogger();
 
-  printsToStdio() {
+  override printsToStdio() {
     return false;
   }
 

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

@@ -19,7 +19,7 @@ import fs from 'fs';
 import path from 'path';
 import type { TransformCallback } from 'stream';
 import { Transform } from 'stream';
-import type { FullConfig, Reporter, Suite } from '../../types/testReporter';
+import type { FullConfig, Suite } from '../../types/testReporter';
 import { HttpServer, assert, calculateSha1, copyFileAndMakeWritable, removeFolders } from 'playwright-core/lib/utils';
 import type { JsonAttachment, JsonReport, JsonSuite, JsonTestCase, JsonTestResult, JsonTestStep } from './raw';
 import RawReporter from './raw';
@@ -31,6 +31,7 @@ import { yazl } from 'playwright-core/lib/zipBundle';
 import { mime } from 'playwright-core/lib/utilsBundle';
 import type { HTMLReport, Stats, TestAttachment, TestCase, TestCaseSummary, TestFile, TestFileSummary, TestResult, TestStep } from '@html-reporter/types';
 import { FullConfigInternal } from '../common/config';
+import EmptyReporter from './empty';
 
 type TestEntry = {
   testCase: TestCase;
@@ -47,7 +48,7 @@ type HtmlReporterOptions = {
   attachmentsBaseURL?: string,
 };
 
-class HtmlReporter implements Reporter {
+class HtmlReporter extends EmptyReporter {
   private config!: FullConfig;
   private suite!: Suite;
   private _options: HtmlReporterOptions;
@@ -57,21 +58,25 @@ class HtmlReporter implements Reporter {
   private _buildResult: { ok: boolean, singleTestId: string | undefined } | undefined;
 
   constructor(options: HtmlReporterOptions) {
+    super();
     this._options = options;
   }
 
-  printsToStdio() {
+  override printsToStdio() {
     return false;
   }
 
-  onBegin(config: FullConfig, suite: Suite) {
+  override onConfigure(config: FullConfig) {
     this.config = config;
+  }
+
+  override onBegin(suite: Suite) {
     const { outputFolder, open, attachmentsBaseURL } = this._resolveOptions();
     this._outputFolder = outputFolder;
     this._open = open;
     this._attachmentsBaseURL = attachmentsBaseURL;
     const reportedWarnings = new Set<string>();
-    for (const project of config.projects) {
+    for (const project of this.config.projects) {
       if (outputFolder.startsWith(project.outputDir) || project.outputDir.startsWith(outputFolder)) {
         const key = outputFolder + '|' + project.outputDir;
         if (reportedWarnings.has(key))
@@ -100,7 +105,7 @@ class HtmlReporter implements Reporter {
     };
   }
 
-  async onEnd() {
+  override async onEnd() {
     const projectSuites = this.suite.suites;
     const reports = projectSuites.map(suite => {
       const rawReporter = new RawReporter();
@@ -112,7 +117,7 @@ class HtmlReporter implements Reporter {
     this._buildResult = await builder.build(this.config.metadata, reports);
   }
 
-  async onExit() {
+  override async onExit() {
     if (process.env.CI || !this._buildResult)
       return;
 

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

@@ -19,44 +19,47 @@ import { colors } from 'playwright-core/lib/utilsBundle';
 import { codeFrameColumns } from '../transform/babelBundle';
 import type { FullConfig, TestCase, TestError, TestResult, FullResult, TestStep } from '../../types/testReporter';
 import { Suite } from '../common/test';
-import { Multiplexer } from './multiplexer';
 import { prepareErrorStack, relativeFilePath } from './base';
 import type { ReporterV2 } from './reporterV2';
 
 export class InternalReporter implements ReporterV2 {
-  private _multiplexer: Multiplexer;
+  private _reporter: ReporterV2;
   private _didBegin = false;
   private _config!: FullConfig;
 
-  constructor(reporters: ReporterV2[]) {
-    this._multiplexer = new Multiplexer(reporters);
+  constructor(reporter: ReporterV2) {
+    this._reporter = reporter;
+  }
+
+  version(): 'v2' {
+    return 'v2';
   }
 
   onConfigure(config: FullConfig) {
     this._config = config;
-    this._multiplexer.onConfigure(config);
+    this._reporter.onConfigure(config);
   }
 
   onBegin(suite: Suite) {
     this._didBegin = true;
-    this._multiplexer.onBegin(suite);
+    this._reporter.onBegin(suite);
   }
 
   onTestBegin(test: TestCase, result: TestResult) {
-    this._multiplexer.onTestBegin(test, result);
+    this._reporter.onTestBegin(test, result);
   }
 
   onStdOut(chunk: string | Buffer, test?: TestCase, result?: TestResult) {
-    this._multiplexer.onStdOut(chunk, test, result);
+    this._reporter.onStdOut(chunk, test, result);
   }
 
   onStdErr(chunk: string | Buffer, test?: TestCase, result?: TestResult) {
-    this._multiplexer.onStdErr(chunk, test, result);
+    this._reporter.onStdErr(chunk, test, result);
   }
 
   onTestEnd(test: TestCase, result: TestResult) {
     this._addSnippetToTestErrors(test, result);
-    this._multiplexer.onTestEnd(test, result);
+    this._reporter.onTestEnd(test, result);
   }
 
   async onEnd(result: FullResult) {
@@ -64,29 +67,29 @@ export class InternalReporter implements ReporterV2 {
       // onBegin was not reported, emit it.
       this.onBegin(new Suite('', 'root'));
     }
-    await this._multiplexer.onEnd(result);
+    await this._reporter.onEnd(result);
   }
 
   async onExit() {
-    await this._multiplexer.onExit();
+    await this._reporter.onExit();
   }
 
   onError(error: TestError) {
     addLocationAndSnippetToError(this._config, error);
-    this._multiplexer.onError(error);
+    this._reporter.onError(error);
   }
 
   onStepBegin(test: TestCase, result: TestResult, step: TestStep) {
-    this._multiplexer.onStepBegin(test, result, step);
+    this._reporter.onStepBegin(test, result, step);
   }
 
   onStepEnd(test: TestCase, result: TestResult, step: TestStep) {
     this._addSnippetToStepError(test, step);
-    this._multiplexer.onStepEnd(test, result, step);
+    this._reporter.onStepEnd(test, result, step);
   }
 
   printsToStdio() {
-    return this._multiplexer.printsToStdio();
+    return this._reporter.printsToStdio();
   }
 
   private _addSnippetToTestErrors(test: TestCase, result: TestResult) {

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

@@ -16,40 +16,45 @@
 
 import fs from 'fs';
 import path from 'path';
-import type { FullConfig, TestCase, Suite, TestResult, TestError, TestStep, FullResult, Location, Reporter, JSONReport, JSONReportSuite, JSONReportSpec, JSONReportTest, JSONReportTestResult, JSONReportTestStep, JSONReportError } from '../../types/testReporter';
+import type { FullConfig, TestCase, Suite, TestResult, TestError, TestStep, FullResult, Location, JSONReport, JSONReportSuite, JSONReportSpec, JSONReportTest, JSONReportTestResult, JSONReportTestStep, JSONReportError } from '../../types/testReporter';
 import { formatError, prepareErrorStack } from './base';
 import { MultiMap } from 'playwright-core/lib/utils';
 import { assert } from 'playwright-core/lib/utils';
 import { FullProjectInternal } from '../common/config';
+import EmptyReporter from './empty';
 
 export function toPosixPath(aPath: string): string {
   return aPath.split(path.sep).join(path.posix.sep);
 }
 
-class JSONReporter implements Reporter {
+class JSONReporter extends EmptyReporter {
   config!: FullConfig;
   suite!: Suite;
   private _errors: TestError[] = [];
   private _outputFile: string | undefined;
 
   constructor(options: { outputFile?: string } = {}) {
+    super();
     this._outputFile = options.outputFile || reportOutputNameFromEnv();
   }
 
-  printsToStdio() {
+  override printsToStdio() {
     return !this._outputFile;
   }
 
-  onBegin(config: FullConfig, suite: Suite) {
+  override onConfigure(config: FullConfig) {
     this.config = config;
+  }
+
+  override onBegin(suite: Suite) {
     this.suite = suite;
   }
 
-  onError(error: TestError): void {
+  override onError(error: TestError): void {
     this._errors.push(error);
   }
 
-  async onEnd(result: FullResult) {
+  override async onEnd(result: FullResult) {
     outputReport(this._serializeReport(), this.config, this._outputFile);
   }
 

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

@@ -16,12 +16,13 @@
 
 import fs from 'fs';
 import path from 'path';
-import type { FullConfig, FullResult, Reporter, Suite, TestCase } from '../../types/testReporter';
+import type { FullConfig, FullResult, Suite, TestCase } from '../../types/testReporter';
 import { monotonicTime } from 'playwright-core/lib/utils';
 import { formatFailure, stripAnsiEscapes } from './base';
 import { assert } from 'playwright-core/lib/utils';
+import EmptyReporter from './empty';
 
-class JUnitReporter implements Reporter {
+class JUnitReporter extends EmptyReporter {
   private config!: FullConfig;
   private suite!: Suite;
   private timestamp!: Date;
@@ -33,22 +34,26 @@ class JUnitReporter implements Reporter {
   private stripANSIControlSequences = false;
 
   constructor(options: { outputFile?: string, stripANSIControlSequences?: boolean } = {}) {
+    super();
     this.outputFile = options.outputFile || reportOutputNameFromEnv();
     this.stripANSIControlSequences = options.stripANSIControlSequences || false;
   }
 
-  printsToStdio() {
+  override printsToStdio() {
     return !this.outputFile;
   }
 
-  onBegin(config: FullConfig, suite: Suite) {
+  override onConfigure(config: FullConfig) {
     this.config = config;
+  }
+
+  override onBegin(suite: Suite) {
     this.suite = suite;
     this.timestamp = new Date();
     this.startTime = monotonicTime();
   }
 
-  async onEnd(result: FullResult) {
+  override async onEnd(result: FullResult) {
     const duration = monotonicTime() - this.startTime;
     const children: XMLEntry[] = [];
     for (const projectSuite of this.suite.suites) {

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

@@ -16,19 +16,19 @@
 
 import { colors } from 'playwright-core/lib/utilsBundle';
 import { BaseReporter, formatError, formatFailure, formatTestTitle } from './base';
-import type { FullConfig, TestCase, Suite, TestResult, FullResult, TestStep, TestError } from '../../types/testReporter';
+import type { TestCase, Suite, TestResult, FullResult, TestStep, TestError } from '../../types/testReporter';
 
 class LineReporter extends BaseReporter {
   private _current = 0;
   private _failures = 0;
   private _lastTest: TestCase | undefined;
 
-  printsToStdio() {
+  override printsToStdio() {
     return true;
   }
 
-  override onBegin(config: FullConfig, suite: Suite) {
-    super.onBegin(config, suite);
+  override onBegin(suite: Suite) {
+    super.onBegin(suite);
     console.log(this.generateStartingMessage());
     console.log();
   }
@@ -62,17 +62,20 @@ class LineReporter extends BaseReporter {
     console.log();
   }
 
-  onTestBegin(test: TestCase, result: TestResult) {
+  override onTestBegin(test: TestCase, result: TestResult) {
+    super.onTestBegin(test, result);
     ++this._current;
     this._updateLine(test, result, undefined);
   }
 
-  onStepBegin(test: TestCase, result: TestResult, step: TestStep) {
+  override onStepBegin(test: TestCase, result: TestResult, step: TestStep) {
+    super.onStepBegin(test, result, step);
     if (step.category === 'test.step')
       this._updateLine(test, result, step);
   }
 
-  onStepEnd(test: TestCase, result: TestResult, step: TestStep) {
+  override onStepEnd(test: TestCase, result: TestResult, step: TestStep) {
+    super.onStepEnd(test, result, step);
     if (step.category === 'test.step')
       this._updateLine(test, result, step.parent);
   }

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

@@ -17,7 +17,7 @@
 /* eslint-disable no-console */
 import { colors, ms as milliseconds } from 'playwright-core/lib/utilsBundle';
 import { BaseReporter, formatError, formatTestTitle, stepSuffix, stripAnsiEscapes } from './base';
-import type { FullConfig, FullResult, Suite, TestCase, TestError, TestResult, TestStep } from '../../types/testReporter';
+import type { FullResult, Suite, TestCase, TestError, TestResult, TestStep } from '../../types/testReporter';
 
 // Allow it in the Visual Studio Code Terminal and the new Windows Terminal
 const DOES_NOT_SUPPORT_UTF8_IN_TERMINAL = process.platform === 'win32' && process.env.TERM_PROGRAM !== 'vscode' && !process.env.WT_SESSION;
@@ -41,12 +41,12 @@ class ListReporter extends BaseReporter {
     this._liveTerminal = process.stdout.isTTY || !!process.env.PWTEST_TTY_WIDTH;
   }
 
-  printsToStdio() {
+  override printsToStdio() {
     return true;
   }
 
-  override onBegin(config: FullConfig, suite: Suite) {
-    super.onBegin(config, suite);
+  override onBegin(suite: Suite) {
+    super.onBegin(suite);
     const startingMessage = this.generateStartingMessage();
     if (startingMessage) {
       console.log(startingMessage);
@@ -54,7 +54,8 @@ class ListReporter extends BaseReporter {
     }
   }
 
-  onTestBegin(test: TestCase, result: TestResult) {
+  override onTestBegin(test: TestCase, result: TestResult) {
+    super.onTestBegin(test, result);
     if (this._liveTerminal)
       this._maybeWriteNewLine();
     this._resultIndex.set(result, String(this._resultIndex.size + 1));
@@ -77,7 +78,8 @@ class ListReporter extends BaseReporter {
     this._dumpToStdio(test, chunk, process.stderr);
   }
 
-  onStepBegin(test: TestCase, result: TestResult, step: TestStep) {
+  override onStepBegin(test: TestCase, result: TestResult, step: TestStep) {
+    super.onStepBegin(test, result, step);
     if (step.category !== 'test.step')
       return;
     const testIndex = this._resultIndex.get(result)!;
@@ -102,7 +104,8 @@ class ListReporter extends BaseReporter {
     }
   }
 
-  onStepEnd(test: TestCase, result: TestResult, step: TestStep) {
+  override onStepEnd(test: TestCase, result: TestResult, step: TestStep) {
+    super.onStepEnd(test, result, step);
     if (step.category !== 'test.step')
       return;
 

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

@@ -33,7 +33,7 @@ class MarkdownReporter extends BaseReporter {
     this._options = options;
   }
 
-  printsToStdio() {
+  override printsToStdio() {
     return false;
   }
 

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

@@ -25,6 +25,10 @@ export class Multiplexer implements ReporterV2 {
     this._reporters = reporters;
   }
 
+  version(): 'v2' {
+    return 'v2';
+  }
+
   onConfigure(config: FullConfig) {
     for (const reporter of this._reporters)
       wrap(() => reporter.onConfigure(config));

packages/playwright-test/src/reporters/reporterV2.ts

@@ -29,6 +29,7 @@ export interface ReporterV2 {
   onStepBegin(test: TestCase, result: TestResult, step: TestStep): void;
   onStepEnd(test: TestCase, result: TestResult, step: TestStep): void;
   printsToStdio(): boolean;
+  version(): 'v2';
 }
 
 type StdIOChunk = {
@@ -37,7 +38,16 @@ type StdIOChunk = {
   result?: TestResult;
 };
 
-export class ReporterV2Wrapper implements ReporterV2 {
+export function wrapReporterAsV2(reporter: Reporter | ReporterV2): ReporterV2 {
+  try {
+    if ('version' in reporter && reporter.version() === 'v2')
+      return reporter as ReporterV2;
+  } catch (e) {
+  }
+  return new ReporterV2Wrapper(reporter as Reporter);
+}
+
+class ReporterV2Wrapper implements ReporterV2 {
   private _reporter: Reporter;
   private _deferred: { error?: TestError, stdout?: StdIOChunk, stderr?: StdIOChunk }[] | null = [];
   private _config!: FullConfig;
@@ -46,6 +56,10 @@ export class ReporterV2Wrapper implements ReporterV2 {
     this._reporter = reporter;
   }
 
+  version(): 'v2' {
+    return 'v2';
+  }
+
   onConfigure(config: FullConfig) {
     this._config = config;
   }

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

@@ -34,6 +34,10 @@ export class TeleReporterEmitter implements ReporterV2 {
     this._skipBuffers = skipBuffers;
   }
 
+  version(): 'v2' {
+    return 'v2';
+  }
+
   onConfigure(config: FullConfig) {
     this._rootDir = config.rootDir;
     this._messageSink({ method: 'onConfigure', params: { config: this._serializeConfig(config) } });

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

@@ -15,7 +15,7 @@
  */
 
 import path from 'path';
-import type { FullConfig, Reporter, TestError } from '../../types/testReporter';
+import type { FullConfig, TestError } from '../../types/testReporter';
 import { formatError } from '../reporters/base';
 import DotReporter from '../reporters/dot';
 import EmptyReporter from '../reporters/empty';
@@ -31,10 +31,11 @@ import type { BuiltInReporter, FullConfigInternal } from '../common/config';
 import { loadReporter } from './loadUtils';
 import { BlobReporter } from '../reporters/blob';
 import type { ReporterDescription } from '../../types/test';
-import { type ReporterV2, ReporterV2Wrapper } from '../reporters/reporterV2';
+import { type ReporterV2, wrapReporterAsV2 } from '../reporters/reporterV2';
 
 export async function createReporters(config: FullConfigInternal, mode: 'list' | 'run' | 'ui' | 'merge', descriptions?: ReporterDescription[]): Promise<ReporterV2[]> {
-  const defaultReporters: { [key in Exclude<BuiltInReporter, 'blob'>]: new(arg: any) => Reporter } = {
+  const defaultReporters: { [key in BuiltInReporter]: new(arg: any) => ReporterV2 } = {
+    blob: BlobReporter,
     dot: mode === 'list' ? ListModeReporter : DotReporter,
     line: mode === 'list' ? ListModeReporter : LineReporter,
     list: mode === 'list' ? ListModeReporter : ListReporter,
@@ -50,18 +51,16 @@ export async function createReporters(config: FullConfigInternal, mode: 'list' |
   for (const r of descriptions) {
     const [name, arg] = r;
     const options = { ...arg, configDir: config.configDir };
-    if (name === 'blob') {
-      reporters.push(new BlobReporter(options));
-    } else if (name in defaultReporters) {
-      reporters.push(new ReporterV2Wrapper(new defaultReporters[name as keyof typeof defaultReporters](options)));
+    if (name in defaultReporters) {
+      reporters.push(new defaultReporters[name as keyof typeof defaultReporters](options));
     } else {
       const reporterConstructor = await loadReporter(config, name);
-      reporters.push(new ReporterV2Wrapper(new reporterConstructor(options)));
+      reporters.push(wrapReporterAsV2(new reporterConstructor(options)));
     }
   }
   if (process.env.PW_TEST_REPORTER) {
     const reporterConstructor = await loadReporter(config, process.env.PW_TEST_REPORTER);
-    reporters.push(new ReporterV2Wrapper(new reporterConstructor()));
+    reporters.push(wrapReporterAsV2(new reporterConstructor()));
   }
 
   const someReporterPrintsToStdio = reporters.some(r => r.printsToStdio());
@@ -69,18 +68,21 @@ export async function createReporters(config: FullConfigInternal, mode: 'list' |
     // Add a line/dot/list-mode reporter for convenience.
     // Important to put it first, jsut in case some other reporter stalls onEnd.
     if (mode === 'list')
-      reporters.unshift(new ReporterV2Wrapper(new ListModeReporter()));
+      reporters.unshift(new ListModeReporter());
     else
-      reporters.unshift(new ReporterV2Wrapper(!process.env.CI ? new LineReporter({ omitFailures: true }) : new DotReporter()));
+      reporters.unshift(!process.env.CI ? new LineReporter({ omitFailures: true }) : new DotReporter());
   }
   return reporters;
 }
 
-class ListModeReporter implements Reporter {
+class ListModeReporter extends EmptyReporter {
   private config!: FullConfig;
 
-  onBegin(config: FullConfig, suite: Suite): void {
+  override onConfigure(config: FullConfig) {
     this.config = config;
+  }
+
+  override onBegin(suite: Suite): void {
     // eslint-disable-next-line no-console
     console.log(`Listing tests:`);
     const tests = suite.allTests();
@@ -88,7 +90,7 @@ class ListModeReporter implements Reporter {
     for (const test of tests) {
       // root, project, file, ...describes, test
       const [, projectName, , ...titles] = test.titlePath();
-      const location = `${path.relative(config.rootDir, test.location.file)}:${test.location.line}:${test.location.column}`;
+      const location = `${path.relative(this.config.rootDir, test.location.file)}:${test.location.line}:${test.location.column}`;
       const projectTitle = projectName ? `[${projectName}] › ` : '';
       // eslint-disable-next-line no-console
       console.log(`  ${projectTitle}${location} › ${titles.join(' › ')}`);
@@ -98,7 +100,7 @@ class ListModeReporter implements Reporter {
     console.log(`Total: ${tests.length} ${tests.length === 1 ? 'test' : 'tests'} in ${files.size} ${files.size === 1 ? 'file' : 'files'}`);
   }
 
-  onError(error: TestError) {
+  override onError(error: TestError) {
     // eslint-disable-next-line no-console
     console.error('\n' + formatError(this.config, error, false).message);
   }

packages/playwright-test/src/runner/runner.ts

@@ -26,6 +26,7 @@ import { colors } from 'playwright-core/lib/utilsBundle';
 import { runWatchModeLoop } from './watchMode';
 import { runUIMode } from './uiMode';
 import { InternalReporter } from '../reporters/internalReporter';
+import { Multiplexer } from '../reporters/multiplexer';
 
 type ProjectConfigWithFiles = {
   name: string;
@@ -69,7 +70,7 @@ export class Runner {
     // Legacy webServer support.
     webServerPluginsForConfig(config).forEach(p => config.plugins.push({ factory: p }));
 
-    const reporter = new InternalReporter(await createReporters(config, listOnly ? 'list' : 'run'));
+    const reporter = new InternalReporter(new Multiplexer(await createReporters(config, listOnly ? 'list' : 'run')));
     const taskRunner = listOnly ? createTaskRunnerForList(config, reporter, 'in-process', { failOnLoadErrors: true })
       : createTaskRunner(config, reporter);
 

packages/playwright-test/src/runner/uiMode.ts

@@ -28,7 +28,7 @@ import type { FSWatcher } from 'chokidar';
 import { open } from 'playwright-core/lib/utilsBundle';
 import ListReporter from '../reporters/list';
 import type { OpenTraceViewerOptions, Transport } from 'playwright-core/lib/server/trace/viewer/traceViewer';
-import { ReporterV2Wrapper } from '../reporters/reporterV2';
+import { Multiplexer } from '../reporters/multiplexer';
 
 class UIMode {
   private _config: FullConfigInternal;
@@ -68,7 +68,7 @@ class UIMode {
   }
 
   async runGlobalSetup(): Promise<FullResult['status']> {
-    const reporter = new InternalReporter([new ReporterV2Wrapper(new ListReporter())]);
+    const reporter = new InternalReporter(new ListReporter());
     const taskRunner = createTaskRunnerForWatchSetup(this._config, reporter);
     reporter.onConfigure(this._config.config);
     const testRun = new TestRun(this._config, reporter);
@@ -161,8 +161,7 @@ class UIMode {
   }
 
   private async _listTests() {
-    const listReporter = new TeleReporterEmitter(e => this._dispatchEvent(e.method, e.params), true);
-    const reporter = new InternalReporter([listReporter]);
+    const reporter = new InternalReporter(new TeleReporterEmitter(e => this._dispatchEvent(e.method, e.params), true));
     this._config.cliListOnly = true;
     this._config.testIdMatcher = undefined;
     const taskRunner = createTaskRunnerForList(this._config, reporter, 'out-of-process', { failOnLoadErrors: false });
@@ -188,7 +187,7 @@ class UIMode {
 
     const reporters = await createReporters(this._config, 'ui');
     reporters.push(new TeleReporterEmitter(e => this._dispatchEvent(e.method, e.params), true));
-    const reporter = new InternalReporter(reporters);
+    const reporter = new InternalReporter(new Multiplexer(reporters));
     const taskRunner = createTaskRunnerForWatch(this._config, reporter);
     const testRun = new TestRun(this._config, reporter);
     clearCompilationCache();

packages/playwright-test/src/runner/watchMode.ts

@@ -31,7 +31,6 @@ import { enquirer } from '../utilsBundle';
 import { separator } from '../reporters/base';
 import { PlaywrightServer } from 'playwright-core/lib/remote/playwrightServer';
 import ListReporter from '../reporters/list';
-import { ReporterV2Wrapper } from '../reporters/reporterV2';
 
 class FSWatcher {
   private _dirtyTestFiles = new Map<FullProjectInternal, Set<string>>();
@@ -113,7 +112,7 @@ export async function runWatchModeLoop(config: FullConfigInternal): Promise<Full
     p.project.retries = 0;
 
   // Perform global setup.
-  const reporter = new InternalReporter([new ReporterV2Wrapper(new ListReporter())]);
+  const reporter = new InternalReporter(new ListReporter());
   const testRun = new TestRun(config, reporter);
   const taskRunner = createTaskRunnerForWatchSetup(config, reporter);
   reporter.onConfigure(config.config);
@@ -281,7 +280,7 @@ async function runTests(config: FullConfigInternal, failedTestIdCollector: Set<s
     title?: string,
   }) {
   printConfiguration(config, options?.title);
-  const reporter = new InternalReporter([new ReporterV2Wrapper(new ListReporter())]);
+  const reporter = new InternalReporter(new ListReporter());
   const taskRunner = createTaskRunnerForWatch(config, reporter, options?.additionalFileMatcher);
   const testRun = new TestRun(config, reporter);
   clearCompilationCache();

packages/trace-viewer/src/ui/uiModeView.tsx

@@ -606,6 +606,8 @@ const refreshRootSuite = (eraseResults: boolean): Promise<void> => {
   };
   let config: FullConfig;
   receiver = new TeleReporterReceiver(pathSeparator, {
+    version: () => 'v2',
+
     onConfigure: (c: FullConfig) => {
       config = c;
     },

tests/playwright-test/web-server.spec.ts

@@ -704,3 +704,32 @@ test('should be able to ignore "stderr"', async ({ runInlineTest }, { workerInde
   expect(result.passed).toBe(1);
   expect(result.output).not.toContain('error from server');
 });
+
+test('should forward stdout when set to "pipe" before server is ready', async ({ runInlineTest }, { workerIndex }) => {
+  test.skip(process.platform === 'win32', 'No sending SIGINT on Windows');
+
+  const result = await runInlineTest({
+    'web-server.js': `
+      console.log('output from server');
+      console.log('\\n%%SEND-SIGINT%%');
+      setTimeout(() => {}, 10000000);
+    `,
+    'test.spec.ts': `
+      import { test, expect } from '@playwright/test';
+      test('pass', async ({}) => {});
+    `,
+    'playwright.config.ts': `
+      module.exports = {
+        webServer: {
+          command: 'node web-server.js',
+          port: 12345,
+          stdout: 'pipe',
+          timeout: 3000,
+        },
+      };
+    `,
+  }, { workers: 1 }, {}, { sendSIGINTAfter: 1 });
+  expect(result.passed).toBe(0);
+  expect(result.output).toContain('[WebServer] output from server');
+  expect(result.output).not.toContain('Timed out waiting 3000ms');
+});