fix: force remove symbol link destination for test tool install

Author: qinzhouxu

packages/fx-core/src/component/deps-checker/internal/testToolChecker.ts

@@ -97,7 +97,7 @@ export class TestToolChecker implements DepsChecker {
       );
       this.telemetryProperties[TelemetryProperties.SelectedPortableTestToolVersion] = version;
       if (symlinkDir) {
-        await createSymlink(portablePath, symlinkDir);
+        await createSymlink(portablePath, symlinkDir, true);
         return await this.getSuccessDepsInfo(version, symlinkDir);
       } else {
         return await this.getSuccessDepsInfo(version, portablePath);
@@ -200,7 +200,7 @@ export class TestToolChecker implements DepsChecker {
     await rename(tmpPath, portablePath);
 
     if (symlinkDir) {
-      await createSymlink(portablePath, symlinkDir);
+      await createSymlink(portablePath, symlinkDir, true);
     }
 
     await this.writeInstallInfoFile(projectPath);

packages/fx-core/src/component/deps-checker/util/fileHelper.ts

@@ -14,9 +14,6 @@ export async function unlinkSymlink(linkFilePath: string): Promise<void> {
     const stat = await fs.lstat(linkFilePath);
     if (stat.isSymbolicLink()) {
       await fs.unlink(linkFilePath);
-    } else {
-      // For regular file or directory, remove it
-      await fs.remove(linkFilePath);
     }
   } catch (error: unknown) {
     const statError = error as { code?: string };
@@ -26,11 +23,23 @@ export async function unlinkSymlink(linkFilePath: string): Promise<void> {
   }
 }
 
-export async function createSymlink(target: string, linkFilePath: string): Promise<void> {
+export async function createSymlink(
+  target: string,
+  linkFilePath: string,
+  forceUpdate = false
+): Promise<void> {
   await unlinkSymlink(linkFilePath);
   // check if destination already exists
   if (await fs.pathExists(linkFilePath)) {
-    throw new DepsCheckerError(Messages.symlinkDirAlreadyExist(linkFilePath), v3DefaultHelpLink);
+    if (!forceUpdate) {
+      throw new DepsCheckerError(Messages.symlinkDirAlreadyExist(linkFilePath), v3DefaultHelpLink);
+    }
+    try {
+      // For regular file or directory, unlink will fail so we remove it
+      await fs.remove(linkFilePath);
+    } catch {
+      throw new DepsCheckerError(Messages.symlinkDirAlreadyExist(linkFilePath), v3DefaultHelpLink);
+    }
   }
 
   return await fs.ensureSymlink(