Add Postgres tests

tests/PostgresTest.php

@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+
+use Illuminate\Support\Facades\DB;
+use Stancl\Tenancy\Tests\Etc\Tenant;
+use Stancl\Tenancy\Jobs\CreatePostgresUserForTenant;
+use Stancl\Tenancy\Jobs\DeleteTenantsPostgresUser;
+
+beforeEach(function () {
+    DB::setDefaultConnection('pgsql');
+});
+
+test('postgres user can get created using the job', function() {
+    $tenant = Tenant::create();
+    $name = $tenant->getTenantKey();
+
+    $tenantHasPostgresUser = count(DB::select("SELECT usename FROM pg_user WHERE usename = '$name';")) > 0;
+
+    expect($tenantHasPostgresUser)->toBeFalse();
+
+    CreatePostgresUserForTenant::dispatchSync($tenant);
+
+    expect($tenantHasPostgresUser)->toBeTrue();
+});
+
+
+test('postgres user can get deleted using the job', function() {
+    $tenant = Tenant::create();
+    $name = $tenant->getTenantKey();
+    CreatePostgresUserForTenant::dispatchSync($tenant);
+
+    $tenantHasPostgresUser = count(DB::select("SELECT usename FROM pg_user WHERE usename = '$name';")) > 0;
+
+    expect($tenantHasPostgresUser)->toBeTrue();
+
+    DeleteTenantsPostgresUser::dispatchSync($tenant);
+
+    expect($tenantHasPostgresUser)->toBeFalse();
+});
+
+test('correct rls policies get created using the command', function() {
+
+});