fix(serializers): revert partially changes in ng-snapshot (#1150)

Closes #1148

src/__tests__/ng-snapshot.spec.ts

@@ -0,0 +1,11 @@
+import ngSnapshot from '../serializers/ng-snapshot';
+
+describe('ng-snapshot', () => {
+  test('should return true when matching the condition', () => {
+    expect(ngSnapshot.test({ componentRef: 'foo' })).toBe(true);
+  });
+
+  test.each([undefined, null, 1, {}])('should return false when not matching the condition', (value) => {
+    expect(ngSnapshot.test(value)).toBe(false);
+  });
+});

src/serializers/ng-snapshot.ts

@@ -101,7 +101,7 @@ const print = (fixture: unknown, print: Printer, indent: Indent, opts: PluginOpt
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any, @typescript-eslint/explicit-module-boundary-types
 const test = (val: any): boolean =>
-  typeof val === 'object' && Object.prototype.hasOwnProperty.call(val, 'componentRef');
+  !!val && typeof val === 'object' && Object.prototype.hasOwnProperty.call(val, 'componentRef');
 
 export = {
   print,