fix(language-service): function.bind() should not be an error (#34041)

When performing diagnostic checks or completions, we should take into
account members and properties in the base class, if any. Otherwise, the
language service will produce a false error.

PR closes https://github.com/angular/vscode-ng-language-service/issues/93

PR Close #34041

packages/language-service/src/typescript_symbols.ts

@@ -271,7 +271,11 @@ class TypeWrapper implements Symbol {
   }
 
   members(): SymbolTable {
-    return new SymbolTableWrapper(this.tsType.getProperties(), this.context);
+    // Should call getApparentProperties() instead of getProperties() because
+    // the former includes properties on the base class whereas the latter does
+    // not. This provides properties like .bind(), .call(), .apply(), etc for
+    // functions.
+    return new SymbolTableWrapper(this.tsType.getApparentProperties(), this.context);
   }
 
   signatures(): Signature[] { return signaturesOf(this.tsType, this.context); }

packages/language-service/test/diagnostics_spec.ts

@@ -128,6 +128,14 @@ describe('diagnostics', () => {
         .toBe(`Identifier 'badProperty' is not defined. 'Hero' does not contain such a member`);
   });
 
+  it('should not produce errors on function.bind()', () => {
+    mockHost.override(TEST_TEMPLATE, `
+      <test-comp (test)="myClick.bind(this)">
+      </test-comp>`);
+    const diags = ngLS.getDiagnostics(TEST_TEMPLATE);
+    expect(diags).toEqual([]);
+  });
+
   describe('in expression-cases.ts', () => {
     it('should report access to an unknown field', () => {
       const diags = ngLS.getDiagnostics(EXPRESSION_CASES).map(d => d.messageText);