Allow link to receive owner directly

reactiveweb/src/link.ts

@@ -111,6 +111,16 @@ function directLink(child: object, parent: object) {
 
   let owner = getOwner(parent);
 
+  // the parent *is* the owner
+  // These checks are based on the `@public` interface of what
+  // an owner is
+  if (!owner && 'lookup' in parent && 'register' in parent && 'ownerInjection' in parent) {
+    // SAFETY: there is no JS-mode way to narrow an object
+    //         to an owner.
+    // SEE: @ember/-internal/owner.d.ts
+    owner = parent as any;
+  }
+
   if (owner) {
     setOwner(child, owner);
   }

tests/test-app/package.json

@@ -24,7 +24,7 @@
     "lint:prettier": "prettier -c .",
     "lint:prettier:fix": "prettier -w .",
     "_syncPnpm": "pnpm sync-dependencies-meta-injected",
-    "start": "concurrently 'ember serve' 'pnpm _syncPnpm --watch' --names 'tests serve,tests sync deps'",
+    "start": "concurrently 'ember serve' 'pnpm sync-dependencies-meta-injected --watch' --names 'tests serve,tests sync deps'",
     "test:ember": "pnpm _syncPnpm && ember test --test-port 0"
   },
   "dependenciesMeta": {
@@ -82,7 +82,6 @@
     "prettier": "^3.0.3",
     "qunit": "^2.20.0",
     "qunit-dom": "^3.0.0",
-    "reactiveweb": "workspace:*",
     "stylelint": "^15.11.0",
     "stylelint-config-standard": "^34.0.0",
     "stylelint-prettier": "^4.0.2",
@@ -101,6 +100,7 @@
     "@nullvoxpopuli/eslint-configs": "^3.2.2",
     "ember-concurrency": "^3.1.1",
     "ember-resources": "^6.4.2",
+    "reactiveweb": "workspace:*",
     "msw": "^1.3.2"
   },
   "msw": {

tests/test-app/tests/utils/link-test.ts

@@ -69,4 +69,18 @@ module('link', function (hooks) {
 
     assert.strictEqual(demo.foo.foo, 2);
   });
+
+  test('can be passed the owner', async function (assert) {
+    this.owner.register('service:foo', FooService);
+
+    class Demo {
+      @service declare foo: FooService;
+    }
+
+    let demo = new Demo();
+
+    link(demo, this.owner);
+
+    assert.strictEqual(demo.foo.foo, 2);
+  });
 });