[4.x] Fix 1267: early return in runForMultiple if an empty array is passed (#1286)

* fix 1267: early return in runForMultiple if an empty array is passed

* Test that runForMulltiple runs the passed closure for the right tenants

* Correct comment

---------

Co-authored-by: lukinovec <lukinovec@gmail.com>

src/Tenancy.php

@@ -204,8 +204,10 @@ class Tenancy
         // Wrap string in array
         $tenants = is_string($tenants) ? [$tenants] : $tenants;
 
-        // Use all tenants if $tenants is falsy
-        $tenants = $tenants ?: $this->model()->cursor(); // todo@phpstan phpstan thinks this isn't needed, but tests fail without it
+        // If $tenants is falsy by this point (e.g. an empty array) there's no work to be done
+        if (! $tenants) {
+            return;
+        }
 
         $originalTenant = $this->tenant;
 

tests/RunForMultipleTest.php

@@ -0,0 +1,73 @@
+<?php
+
+declare(strict_types=1);
+
+use Stancl\Tenancy\Tests\Etc\Tenant;
+use Illuminate\Support\Facades\Event;
+use Stancl\Tenancy\Events\TenantCreated;
+use Stancl\Tenancy\Jobs\CreateDatabase;
+use Stancl\Tenancy\Jobs\MigrateDatabase;
+use Stancl\JobPipeline\JobPipeline;
+use Stancl\Tenancy\Tests\Etc\User;
+use Illuminate\Support\Str;
+use Stancl\Tenancy\Events\TenancyInitialized;
+use Stancl\Tenancy\Listeners\BootstrapTenancy;
+use Stancl\Tenancy\Bootstrappers\DatabaseTenancyBootstrapper;
+
+beforeEach(function () {
+    Event::listen(TenancyInitialized::class, BootstrapTenancy::class);
+
+    Event::listen(TenantCreated::class, JobPipeline::make([
+        CreateDatabase::class,
+        MigrateDatabase::class,
+    ])->send(function (TenantCreated $event) {
+        return $event->tenant;
+    })->toListener());
+
+    config(['tenancy.bootstrappers' => [
+        DatabaseTenancyBootstrapper::class,
+    ]]);
+});
+
+test('runForMultiple runs the passed closure for the right tenants', function() {
+    $tenants = [Tenant::create(), Tenant::create(), Tenant::create()];
+
+    $createUser = fn ($username) => function () use ($username) {
+        User::create(['name' => $username, 'email' => Str::random(8) . '@example.com', 'password' => bcrypt('password')]);
+    };
+
+    // tenancy()->runForMultiple([], ...) shouldn't do anything
+    // No users should be created -- the closure should not run at all
+    tenancy()->runForMultiple([], $createUser('none'));
+    // Try the same with an empty collection -- the result should be the same for any traversable
+    tenancy()->runForMultiple(collect(), $createUser('none'));
+
+    foreach ($tenants as $tenant) {
+        $tenant->run(function() {
+            expect(User::count())->toBe(0);
+        });
+    }
+
+    // tenancy()->runForMultiple(['foo', 'bar'], ...) should run the closure only for the passed tenants
+    tenancy()->runForMultiple([$tenants[0]->getTenantKey(), $tenants[1]->getTenantKey()], $createUser('user'));
+
+    // User should be created for tenants[0] and tenants[1], but not for tenants[2]
+    foreach ($tenants as $tenant) {
+        $tenant->run(function() use ($tenants) {
+            if (tenant()->getTenantKey() !== $tenants[2]->getTenantKey()) {
+                expect(User::first()->name)->toBe('user');
+            } else {
+                expect(User::count())->toBe(0);
+            }
+        });
+    }
+
+    // tenancy()->runForMultiple(null, ...) should run the closure for all tenants
+    tenancy()->runForMultiple(null, $createUser('new_user'));
+
+    foreach ($tenants as $tenant) {
+        $tenant->run(function() {
+            expect(User::all()->pluck('name'))->toContain('new_user');
+        });
+    }
+});