test(rush-lib): verify version bump eligibility and publish dispatch for VSIX

Add tests verifying VS Code extensions use individual versioning
(no lockstep policy) and only target the 'vsix' publish provider,
ensuring correct dispatch through the publish pipeline.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: TheLarkInn

libraries/rush-lib/src/api/test/RushConfiguration.test.ts

@@ -458,6 +458,60 @@ describe(RushConfiguration.name, () => {
       expect(vscodeShared).toBeDefined();
       expect(vscodeShared!.shouldPublish).toBe(false);
     });
+
+    it('verifies VS Code extensions are eligible for version bumping (no lockstep policy)', () => {
+      const rushJsonPath: string = path.resolve(__dirname, '../../../../../rush.json');
+      const rushJson: IRushJson = JsonFile.load(rushJsonPath) as IRushJson;
+
+      const vsixProjectNames: string[] = [
+        'rushstack',
+        '@rushstack/rush-vscode-command-webview',
+        'debug-certificate-manager',
+        'playwright-local-browser-server'
+      ];
+
+      for (const projectName of vsixProjectNames) {
+        const entry: IRushJsonProjectEntry | undefined = rushJson.projects.find(
+          (p: IRushJsonProjectEntry) => p.packageName === projectName
+        );
+        expect(entry).toBeDefined();
+        // shouldPublish must be true for rush version --bump to process the project
+        expect(entry!.shouldPublish).toBe(true);
+        // Must not have a lockstep version policy with publishTarget 'none'
+        // (no versionPolicyName means individual versioning, which is compatible with vsix)
+        expect(entry!.publishTarget).toEqual(['vsix']);
+        // Extensions should not have a lockstep version policy
+        // (they use individual versioning for independent VSIX releases)
+        expect(entry!.versionPolicyName).toBeUndefined();
+      }
+    });
+
+    it('verifies publish dispatch path: vsix projects do not include npm target', () => {
+      const rushJsonPath: string = path.resolve(__dirname, '../../../../../rush.json');
+      const rushJson: IRushJson = JsonFile.load(rushJsonPath) as IRushJson;
+
+      const vsixProjectNames: string[] = [
+        'rushstack',
+        '@rushstack/rush-vscode-command-webview',
+        'debug-certificate-manager',
+        'playwright-local-browser-server'
+      ];
+
+      for (const projectName of vsixProjectNames) {
+        const entry: IRushJsonProjectEntry | undefined = rushJson.projects.find(
+          (p: IRushJsonProjectEntry) => p.packageName === projectName
+        );
+        expect(entry).toBeDefined();
+        const targets: string[] = Array.isArray(entry!.publishTarget)
+          ? entry!.publishTarget
+          : [entry!.publishTarget!];
+        // VSIX projects must only have 'vsix' target (not 'npm')
+        // This ensures rush publish dispatches to VsixPublishProvider, not NpmPublishProvider
+        expect(targets).toEqual(['vsix']);
+        expect(targets).not.toContain('npm');
+        expect(targets).not.toContain('none');
+      }
+    });
   });
 
   describe(RushConfigurationProject.name, () => {