Move triggerRestoredEvent(), test restoring Syncables

Update comments in DeleteResourceMapping to explain the detach() behavior. Move triggerRestoredEvent() from SyncMaster to Syncable interface, test restoring tenant resources.

src/ResourceSyncing/Listeners/DeleteResourceMapping.php

@@ -34,8 +34,8 @@ class DeleteResourceMapping extends QueueableListener
         // or the central resource was deleted using forceDelete()
         if ($event->forceDelete || ! in_array(SoftDeletes::class, class_uses_recursive($centralResource::class), true)) {
             Pivot::withoutEvents(function () use ($centralResource, $event) {
-                // $event->tenant is null when the deleted resource is a SyncMaster - all mappings are deleted in that case
+                // If detach() is called with null -- if $event->tenant is null -- this means a central resource was deleted and detaches all tenants.
-                // When $event->tenant is not null (= a Syncable was deleted), only delete the mapping for that tenant
+                // If detach() is called with a specific tenant, it means the resource was deleted in that tenant, and we only delete that single mapping.
                 $centralResource->tenants()->detach($event->tenant);
             });
         }

src/ResourceSyncing/SyncMaster.php

@@ -24,6 +24,4 @@ interface SyncMaster extends Syncable
     public function triggerDetachEvent(TenantWithDatabase&Model $tenant): void;
 
     public function triggerAttachEvent(TenantWithDatabase&Model $tenant): void;
-
-    public function triggerRestoredEvent(): void;
 }

src/ResourceSyncing/Syncable.php

@@ -18,6 +18,8 @@ interface Syncable
 
     public function triggerDeleteEvent(bool $forceDelete = false): void;
 
+    public function triggerRestoredEvent(): void;
+
     /**
      * Get the attributes used for creating the *other* model (i.e. tenant if this is the central one, and central if this is the tenant one).
      *

tests/ResourceSyncingTest.php

@@ -1102,7 +1102,16 @@ test('restoring soft deleted resources works', function () {
     CentralUserWithSoftDeletes::withTrashed()->first()->restore();
 
     tenancy()->runForMultiple([$tenant1, $tenant2], function () {
-        expect(TenantUserWithSoftDeletes::withTrashed()->first()->trashed())->toBeFalse();
+        $tenantResource = TenantUserWithSoftDeletes::withTrashed()->first();
+
+        expect($tenantResource->trashed())->toBeFalse();
+
+        $tenantResource->delete();
+
+        // Restoring a tenant resource works as expected
+        $tenantResource->restore();
+
+        expect($tenantResource->trashed())->toBeFalse();
     });
 });