[2.3.0] tenant_route() helper (#229)

* Add tenant_route helper

* Add tests

* Remove redundant setUp()

* Fix test namespaces

* Apply fixes from StyleCI

tests/RedirectTest.php

@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Stancl\Tenancy\Tests;
+
+use Route;
+use Stancl\Tenancy\Tenant;
+
+class RedirectTest extends TestCase
+{
+    public $autoCreateTenant = false;
+    public $autoInitTenancy = false;
+
+    /** @test */
+    public function tenant_redirect_macro_replaces_only_the_hostname()
+    {
+        config([
+            'tenancy.features' => ['Stancl\Tenancy\Features\TenantRedirect'],
+        ]);
+
+        Route::get('/foobar', function () {
+            return 'Foo';
+        })->name('home');
+
+        Route::get('/redirect', function () {
+            return redirect()->route('home')->tenant('abcd');
+        });
+
+        Tenant::create('foo.localhost');
+        tenancy()->init('foo.localhost');
+
+        $this->get('/redirect')
+            ->assertRedirect('http://abcd/foobar');
+    }
+
+    /** @test */
+    public function tenant_route_helper_generates_correct_url()
+    {
+        Route::get('/abcdef/{a?}/{b?}', function () {
+            return 'Foo';
+        })->name('foo');
+
+        $this->assertSame('http://foo.localhost/abcdef/as/df', tenant_route('foo', ['a' => 'as', 'b' => 'df'], 'foo.localhost'));
+        $this->assertSame('http://foo.localhost/abcdef', tenant_route('foo', [], 'foo.localhost'));
+
+        $this->assertSame('http://' . request()->getHost() . '/abcdef/x/y', tenant_route('foo', ['a' => 'x', 'b' => 'y']));
+    }
+}