#6143 test: add standalone forwardRef regression

tests/issue-6143/test.spec.ts

@@ -0,0 +1,63 @@
+import { CommonModule } from '@angular/common';
+import { Component, forwardRef, VERSION } from '@angular/core';
+
+import { MockBuilder, MockRender, ngMocks } from 'ng-mocks';
+
+// Regression coverage for #6143:
+// - this standalone child imports its standalone parent via forwardRef
+// - the parent imports the child directly
+//
+// The same setup fails with a recursive stack overflow on v14.7.1 for the
+// Angular 15 line reported in the issue, but current main should keep rendering
+// both sides of the standalone graph correctly.
+@Component({
+  selector: 'issue-6143-child',
+  template: 'ChildComponent',
+  ['standalone' as never /* TODO: remove after upgrade to a14 */]: true,
+  ['imports' as never /* TODO: remove after upgrade to a14 */]: [
+    CommonModule,
+    forwardRef(() => ParentComponent),
+  ],
+})
+class ChildComponent {}
+
+@Component({
+  selector: 'issue-6143-parent',
+  template: 'ParentComponent',
+  ['standalone' as never /* TODO: remove after upgrade to a14 */]: true,
+  ['imports' as never /* TODO: remove after upgrade to a14 */]: [
+    CommonModule,
+    ChildComponent,
+  ],
+})
+class ParentComponent {}
+
+describe('issue-6143', () => {
+  if (Number.parseInt(VERSION.major, 10) < 15) {
+    it('needs >=a15', () => {
+      expect(true).toBeTruthy();
+    });
+
+    return;
+  }
+
+  describe('ChildComponent', () => {
+    beforeEach(() => MockBuilder(ChildComponent));
+
+    it('renders without recursive parsing failures', () => {
+      const fixture = MockRender(ChildComponent);
+
+      expect(ngMocks.formatText(fixture)).toEqual('ChildComponent');
+    });
+  });
+
+  describe('ParentComponent', () => {
+    beforeEach(() => MockBuilder(ParentComponent));
+
+    it('renders its own standalone graph', () => {
+      const fixture = MockRender(ParentComponent);
+
+      expect(ngMocks.formatText(fixture)).toEqual('ParentComponent');
+    });
+  });
+});