feat: Normalize host_set_id in target host sets response

addons/api/addon/serializers/fragment-host-set.js

@@ -0,0 +1,18 @@
+import JSONSerializer from '@ember-data/serializer/json';
+
+export default class FragmentHostSetSerializer extends JSONSerializer {
+
+  // =methods
+
+  /**
+   * Renames `id` to `host_set_id` because fragments may not have IDs.
+   * Otherwise normalizes as normal.
+   * @param {ModelClass} typeClass
+   * @param {object} resourceHash
+   * @return {object}
+   */
+  normalize(typeClass, { id: host_set_id, ...obj }) {
+    return super.normalize(typeClass, { host_set_id, ...obj });
+  }
+
+}

addons/api/app/serializers/fragment-host-set.js

@@ -0,0 +1 @@
+export { default } from 'api/serializers/fragment-host-set';

addons/api/tests/unit/serializers/fragment-host-set-test.js

@@ -0,0 +1,28 @@
+import { module, test } from 'qunit';
+import { setupTest } from 'ember-qunit';
+import FragmentHostSet from 'api/models/fragment-host-set';
+
+module('Unit | Serializer | fragment host set', function(hooks) {
+  setupTest(hooks);
+
+  test('it normalizes `id` into `host_set_id`', function(assert) {
+    assert.expect(1);
+    const store = this.owner.lookup('service:store');
+    const serializer = store.serializerFor('fragment-host-set');
+    const normalized = serializer.normalize(FragmentHostSet, {
+      host_set_id: '2',
+      host_catalog_id: '1'
+    });
+    assert.deepEqual(normalized, {
+      data: {
+        attributes: {
+          host_set_id: '2',
+          host_catalog_id: '1'
+        },
+        id: null,
+        relationships: {},
+        type: 'fragment-host-set'
+      }
+    });
+  });
+});