chore: fix language binding based install message (#18480)

packages/playwright-core/src/inProcessFactory.ts

@@ -19,9 +19,10 @@ import { createPlaywright, DispatcherConnection, RootDispatcher, PlaywrightDispa
 import { Connection } from './client/connection';
 import { BrowserServerLauncherImpl } from './browserServerImpl';
 import { AndroidServerLauncherImpl } from './androidServerImpl';
+import type { Language } from './server/isomorphic/locatorGenerators';
 
 export function createInProcessPlaywright(): PlaywrightAPI {
-  const playwright = createPlaywright('javascript');
+  const playwright = createPlaywright((process.env.PW_LANG_NAME as Language | undefined) || 'javascript');
 
   const clientConnection = new Connection();
   const dispatcherConnection = new DispatcherConnection(true /* local */);

tests/installation/playwright-cli-install-should-work-with-languages.spec.ts

@@ -0,0 +1,39 @@
+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { test, expect } from './npmTest';
+
+test('codegen should print the right install command without browsers', async ({ exec }) => {
+  await exec('npm i --foreground-scripts playwright', { env: { PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: '1' } });
+
+  const pwLangName2InstallCommand = {
+    'java': 'mvn exec:java -e -Dexec.mainClass=com.microsoft.playwright.CLI -Dexec.args="install"',
+    'python': 'playwright install',
+    'csharp': 'pwsh bin/Debug/netX/playwright.ps1 install',
+    '': 'npx playwright install',
+  };
+
+  for (const [langName, installCommand] of Object.entries(pwLangName2InstallCommand)) {
+    await test.step(`codegen should work for ${langName}`, async () => {
+      const result = await exec('npx playwright codegen', {
+        expectToExitWithError: true,
+        env: {
+          PW_LANG_NAME: langName,
+        }
+      });
+      expect(result).toContain(installCommand);
+    });
+  }
+});