fix(ivy): directives without selector should not be supported (#28021)

PR Close #28021

packages/compiler-cli/src/ngtsc/annotations/src/directive.ts

@@ -165,6 +165,9 @@ export function extractDirectiveMetadata(
     }
     selector = resolved;
   }
+  if (!selector) {
+    throw new Error(`Directive ${clazz.name !.text} has no selector, please add it!`);
+  }
 
   const host = extractHostBindings(directive, decoratedElements, evaluator, coreModule);
 

packages/compiler-cli/test/compliance/r3_compiler_compliance_spec.ts

@@ -640,9 +640,6 @@ describe('compiler compliance', () => {
           'spec.ts': `
             import {Component, Directive, NgModule} from '@angular/core';
 
-            @Directive({})
-            export class EmptyOutletDirective {}
-
             @Component({template: '<router-outlet></router-outlet>'})
             export class EmptyOutletComponent {}
 
@@ -652,16 +649,6 @@ describe('compiler compliance', () => {
         }
       };
 
-      // EmptyOutletDirective definition should be:
-      const EmptyOutletDirectiveDefinition = `
-        …
-        EmptyOutletDirective.ngDirectiveDef = $r3$.ɵdefineDirective({
-          type: EmptyOutletDirective,
-          selectors: [],
-          factory: function EmptyOutletDirective_Factory(t) { return new (t || EmptyOutletDirective)(); }
-        });
-      `;
-
       // EmptyOutletComponent definition should be:
       const EmptyOutletComponentDefinition = `
         …
@@ -683,13 +670,48 @@ describe('compiler compliance', () => {
       const result = compile(files, angularFiles);
       const source = result.source;
 
-      expectEmit(
-          source, EmptyOutletDirectiveDefinition,
-          'Incorrect EmptyOutletDirective.ngDirectiveDefDef');
       expectEmit(
           source, EmptyOutletComponentDefinition, 'Incorrect EmptyOutletComponent.ngComponentDef');
     });
 
+    it('should not support directives without selector', () => {
+      const files = {
+        app: {
+          'spec.ts': `
+            import {Component, Directive, NgModule} from '@angular/core';
+
+            @Directive({})
+            export class EmptyOutletDirective {}
+
+            @NgModule({declarations: [EmptyOutletDirective]})
+            export class MyModule{}
+          `
+        }
+      };
+
+      expect(() => compile(files, angularFiles))
+          .toThrowError('Directive EmptyOutletDirective has no selector, please add it!');
+    });
+
+    it('should not support directives with empty selector', () => {
+      const files = {
+        app: {
+          'spec.ts': `
+            import {Component, Directive, NgModule} from '@angular/core';
+
+            @Directive({selector: ''})
+            export class EmptyOutletDirective {}
+
+            @NgModule({declarations: [EmptyOutletDirective]})
+            export class MyModule{}
+          `
+        }
+      };
+
+      expect(() => compile(files, angularFiles))
+          .toThrowError('Directive EmptyOutletDirective has no selector, please add it!');
+    });
+
     it('should not treat ElementRef, ViewContainerRef, or ChangeDetectorRef specially when injecting',
        () => {
          const files = {

packages/compiler/src/render3/view/compiler.ts

@@ -164,9 +164,9 @@ export function compileDirectiveFromMetadata(
   addFeatures(definitionMap, meta);
   const expression = o.importExpr(R3.defineDirective).callFn([definitionMap.toLiteralMap()]);
 
-  // On the type side, remove newlines from the selector as it will need to fit into a TypeScript
+  if (!meta.selector) {
-  // string literal, which must be on one line.
+    throw new Error(`Directive ${meta.name} has no selector, please add it!`);
-  const selectorForType = (meta.selector || '').replace(/\n/g, '');
+  }
 
   const type = createTypeForDef(meta, R3.DirectiveDefWithMeta);
   return {expression, type, statements};

packages/core/test/linker/integration_spec.ts

@@ -1423,8 +1423,7 @@ function declareTests(config?: {useJit: boolean}) {
         expect(getDOM().querySelectorAll(fixture.nativeElement, 'script').length).toEqual(0);
       });
 
-      fixmeIvy('FW-662: Components without selector are not supported')
+      it('should throw when using directives without selector', () => {
-          .it('should throw when using directives without selector', () => {
         @Directive({})
         class SomeDirective {
         }
@@ -1435,8 +1434,7 @@ function declareTests(config?: {useJit: boolean}) {
 
         TestBed.configureTestingModule({declarations: [MyComp, SomeDirective, SomeComponent]});
         expect(() => TestBed.createComponent(MyComp))
-                .toThrowError(
+            .toThrowError(`Directive ${stringify(SomeDirective)} has no selector, please add it!`);
-                    `Directive ${stringify(SomeDirective)} has no selector, please add it!`);
       });
 
       it('should use a default element name for components without selectors', () => {