The builder had to be registered to the helper manager

Author: NullVoxPopuli

ember-resources/src/intermediate-representation.ts

@@ -193,7 +193,7 @@ export class Resource<Value> {
   }
 }
 
-setHelperManager(ResourceManagerFactory, Resource);
+setHelperManager(ResourceManagerFactory, Builder.prototype);
 
 function isReactive<Value>(maybe: unknown): maybe is Reactive<Value> {
   return typeof maybe === 'object' && maybe !== null && CURRENT in maybe;

test-app/tests/core/rendering-test.gts

@@ -9,29 +9,29 @@ import { cell, resource, resourceFactory } from 'ember-resources';
 module('Core | Resource | rendering', function (hooks) {
   setupRenderingTest(hooks);
 
-  module('cleanup with wrapping factory/blueprint', function() {
+  module('cleanup with wrapping factory/blueprint', function () {
     test('a generated interval can be cleared', async function (assert) {
       const id = cell(0);
       const condition = cell(true);
 
-      const poll = resourceFactory((id: number) => {
+      const poll = (id: number) => {
         return resource(({ on }) => {
           assert.step(`setup: ${id}`);
           on.cleanup(() => assert.step(`cleanup: ${id}`));
 
           return id;
         });
-      });
+      };
 
-      await render(
-        <template>
-          <button type="button" {{on 'click' condition.toggle}}>Toggle</button><br />
+      resourceFactory(poll);
 
-          {{#if condition.current}}
-            {{poll id.current}}
-          {{/if}}
-        </template>
-      );
+      await render(<template>
+        <button type="button" {{on "click" condition.toggle}}>Toggle</button><br />
+
+        {{#if condition.current}}
+          {{poll id.current}}
+        {{/if}}
+      </template>);
 
       assert.verifySteps(['setup: 0']);