test(language-service): recognize inputs/ouputs declared in decorator (#34875)

This commit adds a regression test to check that the language service
recognizes inputs and outputs declared in a directive decorator.

See #34874.

PR Close #34875

packages/language-service/test/project/app/main.ts

@@ -34,6 +34,7 @@ import * as ParsingCases from './parsing-cases';
     ParsingCases.CaseMissingClosing,
     ParsingCases.CaseUnknown,
     ParsingCases.EmptyInterpolation,
+    ParsingCases.HintModel,
     ParsingCases.NoValueAttribute,
     ParsingCases.NumberModel,
     ParsingCases.Pipes,

packages/language-service/test/project/app/parsing-cases.ts

@@ -60,6 +60,16 @@ export class NumberModel {
   @Output('outputAlias') modelChange: EventEmitter<number> = new EventEmitter();
 }
 
+@Directive({
+  selector: '[hint-model]',
+  inputs: ['hint'],
+  outputs: ['hintChange'],
+})
+export class HintModel {
+  hint: string = 'hint';
+  hintChange: EventEmitter<string> = new EventEmitter();
+}
+
 interface Person {
   name: string;
   age: number;