Add return value to execute method (#333)

* Add command for test

* Write test to verify issue

* Make test pass

tests/Traits/TenantAwareCommandTest.php

@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Stancl\Tenancy\Tests\Traits;
+
+use Stancl\Tenancy\Tenant;
+use Stancl\Tenancy\Tests\TestCase;
+
+class TenantAwareCommandTest extends TestCase
+{
+    public $autoCreateTenant = false;
+    public $autoInitTenancy = false;
+
+    /** @test */
+    public function commands_run_globally_are_tenant_aware_and_return_valid_exit_code()
+    {
+        $tenant1 = Tenant::new()->save();
+        $tenant2 = Tenant::new()->save();
+        \Artisan::call('tenants:migrate', [
+            '--tenants' => [$tenant1['id'], $tenant2['id']],
+        ]);
+
+        $this->artisan('user:add')
+            ->assertExitCode(1);
+
+        tenancy()->initializeTenancy($tenant1);
+        $this->assertNotEmpty(\DB::table('users')->get());
+        tenancy()->end();
+
+        tenancy()->initializeTenancy($tenant2);
+        $this->assertNotEmpty(\DB::table('users')->get());
+        tenancy()->end();
+    }
+}