test: use raw core index-update for the tests

It should make integration tests more resilient on the Windows CI.

From now on, tests are not starting a daemon to initialize the
`directories.data` folder for the test suites but rely on the raw
command. It is required to avoid spawning the discovery processes, which
cannot be terminated on Windows while the daemon is up and running.

Closes #2059

Signed-off-by: Akos Kitta <[email protected]>

Author: Akos Kitta

Diff for: arduino-ide-extension/src/test/node/core-client-provider.slow-test.ts

@@ -1,5 +1,4 @@
 import { DisposableCollection } from '@theia/core/lib/common/disposable';
-import { waitForEvent } from '@theia/core/lib/common/promise-util';
 import type { MaybePromise } from '@theia/core/lib/common/types';
 import { FileUri } from '@theia/core/lib/node/file-uri';
 import { Container } from '@theia/core/shared/inversify';
@@ -16,6 +15,7 @@ import { ArduinoDaemonImpl } from '../../node/arduino-daemon-impl';
 import { CLI_CONFIG, DefaultCliConfig } from '../../node/cli-config';
 import { BoardListRequest } from '../../node/cli-protocol/cc/arduino/cli/commands/v1/board_pb';
 import { CoreClientProvider } from '../../node/core-client-provider';
+import { spawnCommand } from '../../node/exec-util';
 import { ConfigDirUriProvider } from '../../node/theia/env-variables/env-variables-server';
 import { ErrnoException } from '../../node/utils/errors';
 import {
@@ -177,10 +177,9 @@ describe('core-client-provider', () => {
         boardsPackages.filter(({ id }) => id === 'teensy:avr').length
       ).to.be.equal(1);
     };
-    const configDirPath = await prepareTestConfigDir(
-      { board_manager: { additional_urls: additionalUrls } },
-      ({ boardsService }) => assertTeensyAvailable(boardsService)
-    );
+    const configDirPath = await prepareTestConfigDir({
+      board_manager: { additional_urls: additionalUrls },
+    });
     const thirdPartyPackageIndexPath = join(
       configDirPath,
       'data',
@@ -273,27 +272,31 @@ async function assertFunctionalCli(
  * the config folder.
  */
 async function prepareTestConfigDir(
-  configOverrides: Partial<DefaultCliConfig> = {},
-  otherExpect?: (services: Services) => MaybePromise<void>
+  configOverrides: Partial<DefaultCliConfig> = {}
 ): Promise<string> {
-  const toDispose = new DisposableCollection();
   const params = { configDirPath: newTempConfigDirPath(), configOverrides };
   const container = await createContainer(params);
-  try {
-    await start(container, toDispose);
-    await assertFunctionalCli(container, otherExpect);
-    const configDirUriProvider =
-      container.get<ConfigDirUriProvider>(ConfigDirUriProvider);
-    return FileUri.fsPath(configDirUriProvider.configDirUri());
-  } finally {
-    const daemon = container.get<ArduinoDaemonImpl>(ArduinoDaemonImpl);
-    // Wait for the daemon stop event. All subprocesses (such as `serial-discovery` and `mdns-discovery`) must terminate.
-    // Otherwise, `EPERM: operation not permitted, unlink` is thrown on Windows when "corrupting" the `directories.data` folder for the tests.
-    await Promise.all([
-      waitForEvent(daemon.onDaemonStopped, 5_000),
-      Promise.resolve(toDispose.dispose()),
-    ]);
-  }
+  const daemon = container.get<ArduinoDaemonImpl>(ArduinoDaemonImpl);
+  const cliPath = await daemon.getExecPath();
+  const configDirUriProvider =
+    container.get<ConfigDirUriProvider>(ConfigDirUriProvider);
+  const configDirPath = FileUri.fsPath(configDirUriProvider.configDirUri());
+  await coreUpdateIndex(cliPath, configDirPath);
+  return configDirPath;
+}
+
+async function coreUpdateIndex(
+  cliPath: string,
+  configDirPath: string
+): Promise<void> {
+  const cliConfigPath = join(configDirPath, 'arduino-cli.yaml');
+  await fs.access(cliConfigPath);
+  const stdout = await spawnCommand(
+    cliPath,
+    ['core', 'update-index', '--config-file', cliConfigPath],
+    (error) => console.error(error)
+  );
+  console.log(stdout);
 }
 
 async function startCli(
@@ -312,15 +315,8 @@ async function startCli(
     throw err;
   }
   const container = await createContainer(configDirPath);
-  await start(container, toDispose);
-  return container;
-}
-
-async function start(
-  container: Container,
-  toDispose: DisposableCollection
-): Promise<void> {
   await startDaemon(container, toDispose);
+  return container;
 }
 
 async function createContainer(