Add is-waypoint-record util (moved from ember-core)

addon/utils/is-waypoint-record.js

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+import WaypointModel from '../models/waypoint';
+
+export default function isWaypointRecord(record) {
+    return record instanceof WaypointModel;
+}

app/utils/is-waypoint-record.js

@@ -0,0 +1 @@
+export { default } from '@fleetbase/fleetops-data/utils/is-waypoint-record';

tests/unit/utils/is-waypoint-record-test.js

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+import isWaypointRecord from 'dummy/utils/is-waypoint-record';
+import WaypointModel from 'dummy/models/waypoint';
+import PlaceModel from 'dummy/models/place';
+import { module, test } from 'qunit';
+import { setupTest } from 'dummy/tests/helpers';
+import ObjectProxy from '@ember/object/proxy';
+
+module('Unit | Utility | is-waypoint-record', function (hooks) {
+    setupTest(hooks);
+
+    hooks.beforeEach(function () {
+        this.store = this.owner.lookup('service:store');
+    });
+
+    test('it returns true for a waypoint record', function (assert) {
+        assert.true(isWaypointRecord(this.store.createRecord('waypoint', {})));
+    });
+
+    test('it returns false for a place, which waypoint extends', function (assert) {
+        // WaypointModel extends PlaceModel, so the check has to be narrow enough
+        // to reject the parent while still accepting the child.
+        assert.true(WaypointModel.prototype instanceof PlaceModel, 'waypoint does extend place');
+        assert.false(isWaypointRecord(this.store.createRecord('place', {})));
+    });
+
+    test('it returns false for an unrelated record', function (assert) {
+        assert.false(isWaypointRecord(this.store.createRecord('order', {})));
+    });
+
+    test('it returns false for a proxy wrapping a waypoint', function (assert) {
+        const record = this.store.createRecord('waypoint', {});
+
+        assert.false(isWaypointRecord(ObjectProxy.create({ content: record })), 'instanceof looks at the proxy, not its content');
+    });
+
+    test('it returns false for plain and nullish values', function (assert) {
+        assert.false(isWaypointRecord({}));
+        assert.false(isWaypointRecord(null));
+        assert.false(isWaypointRecord(undefined));
+        assert.false(isWaypointRecord('waypoint'));
+        assert.false(isWaypointRecord([]));
+    });
+
+    test('it returns false for an object merely shaped like a waypoint', function (assert) {
+        assert.false(isWaypointRecord({ place: {}, order: 1 }), 'the check is by identity, not by shape');
+    });
+});