update API command for #85533

src/vs/workbench/api/common/extHostApiCommands.ts

@@ -86,7 +86,7 @@ const newCommands: ApiCommand[] = [
 	new ApiCommand(
 		'vscode.prepareCallHierarchy', '_executePrepareCallHierarchy', 'Prepare call hierarchy at a position inside a document',
 		[ApiCommandArgument.Uri, ApiCommandArgument.Position],
-		new ApiCommandResult<ICallHierarchyItemDto, types.CallHierarchyItem>('A CallHierarchyItem or undefined', v => typeConverters.CallHierarchyItem.to(v))
+		new ApiCommandResult<ICallHierarchyItemDto[], types.CallHierarchyItem[]>('A CallHierarchyItem or undefined', v => v.map(typeConverters.CallHierarchyItem.to))
 	),
 	new ApiCommand(
 		'vscode.provideIncomingCalls', '_executeProvideIncomingCalls', 'Compute incoming calls for an item',

src/vs/workbench/contrib/callHierarchy/browser/callHierarchy.ts

@@ -172,7 +172,7 @@ CommandsRegistry.registerCommand('_executePrepareCallHierarchy', async (accessor
 				_models.delete(key);
 			}
 		});
-		return model.root;
+		return [model.root];
 
 	} finally {
 		dispose(textModelReference);

src/vs/workbench/test/electron-browser/api/extHostApiCommands.test.ts

@@ -885,16 +885,17 @@ suite('ExtHostLanguageFeatureCommands', function () {
 
 		await rpcProtocol.sync();
 
-		const root = await commands.executeCommand<vscode.CallHierarchyItem>('vscode.prepareCallHierarchy', model.uri, new types.Position(0, 0));
+		const root = await commands.executeCommand<vscode.CallHierarchyItem[]>('vscode.prepareCallHierarchy', model.uri, new types.Position(0, 0));
 
-		assert.ok(root);
-		assert.equal(root.name, 'ROOT');
+		assert.ok(Array.isArray(root));
+		assert.equal(root.length, 1);
+		assert.equal(root[0].name, 'ROOT');
 
-		const incoming = await commands.executeCommand<vscode.CallHierarchyIncomingCall[]>('vscode.provideIncomingCalls', root);
+		const incoming = await commands.executeCommand<vscode.CallHierarchyIncomingCall[]>('vscode.provideIncomingCalls', root[0]);
 		assert.equal(incoming.length, 1);
 		assert.equal(incoming[0].from.name, 'INCOMING');
 
-		const outgoing = await commands.executeCommand<vscode.CallHierarchyOutgoingCall[]>('vscode.provideOutgoingCalls', root);
+		const outgoing = await commands.executeCommand<vscode.CallHierarchyOutgoingCall[]>('vscode.provideOutgoingCalls', root[0]);
 		assert.equal(outgoing.length, 1);
 		assert.equal(outgoing[0].to.name, 'OUTGOING');
 	});