improve hook & testing docs (fix #38)

docs/source/v2/application-testing.blade.md

@@ -7,9 +7,11 @@ section: content
 
 # Application Testing {#application-testing}
 
-> Note: You cannot use `:memory:` SQLite databases or the `RefreshDatabase` trait due to the switching of default database.
+> Note: At the moment it's not possible to use `:memory:` SQLite databases or the `RefreshDatabase` trait due to the switching of default database. This will hopefully change in the future.
 
-To test your application with this package installed, you can create tenants in the `setUp()` method of your test case:
+### Initializing tenancy
+
+You can create tenants in the `setUp()` method of your test case:
 
 ```php
 protected function setUp(): void
@@ -21,7 +23,46 @@ protected function setUp(): void
 }
 ```
 
-And to delete tenants & their databases after tests:
+If you don't want to initialize tenancy before each test, you may want to do something like this:
+```php
+class TestCase // extends ...
+{
+    protected $tenancy = false;
+
+    public function setUp(): void
+    {
+        if ($this->tenancy) {
+            $this->initializeTenancy();
+        }
+    }
+
+    public function initializeTenancy($domain = 'test.localhost')
+    {
+        tenancy()->create($domain);
+        tenancy()->init($domain);
+    }
+
+    // ...
+}
+```
+
+And in your individual test classes:
+```php
+class FooTest
+{
+    protected $tenancy = true;
+
+    /** @test */
+    public function some_test()
+    {
+        $this->assertTrue(...);
+    }
+}
+```
+
+### Cleanup
+
+To delete tenants & their databases after tests, you may use this:
 ```php
 public function tearDown(): void
 {
@@ -35,7 +76,9 @@ public function tearDown(): void
 }
 ```
 
-If you're using the database storage driver, you will also need to run the migrations:
+### Storage setup
+
+If you're using the database storage driver, you will need to run the migrations in `setUp()`:
 ```php
 protected function setUp(): void
 {
@@ -43,8 +86,7 @@ protected function setUp(): void
 
     $this->artisan('migrate:fresh');
 
-    tenancy()->create('test.localhost');
-    tenancy()->init('test.localhost');
+    // ...
 }
 ```
 
@@ -58,7 +100,59 @@ protected function setUp(): void
     // make sure you're using a different connection for testing to avoid losing data
     Redis::connection('tenancyTesting')->flushdb();
 
-    tenant()->create('test.localhost');
-    tenancy()->init('test.localhost');
+    // ...
 }
 ```
+
+### Sample TestCase
+
+Put together, here's a ready-to-use base TestCase for the DB storage driver
+```php
+<?php
+
+namespace Tests;
+
+use Illuminate\Foundation\Testing\TestCase as BaseTestCase;
+
+abstract class TestCase extends BaseTestCase
+{
+    use CreatesApplication;
+
+    public function setUp(): void
+    {
+        parent::setUp();
+
+        $this->artisan('migrate:fresh');
+
+        config([
+            'tenancy.queue_database_creation' => false,
+        ]);
+
+        config(['tenancy.exempt_domains' => [
+            '127.0.0.1',
+            'localhost',
+        ]]);
+    }
+
+    public function tearDown(): void
+    {
+        config([
+            'tenancy.queue_database_deletion' => false,
+            'tenancy.delete_database_after_tenant_deletion' => true,
+        ]);
+        tenancy()->all()->each->delete();
+
+        parent::tearDown();
+    }
+}
+```
+
+phpunit.xml:
+```xml
+<server name="DB_DRIVER" value="sqlite"/>
+<server name="DB_DATABASE" value="database/testing.sqlite"/>
+```
+
+> Don't forget to create an empty database/testing.sqlite
+
+You may also wish toa dd `testing.sqlite` to `database/.gitignore`.