add observer test

tests/ObserverTest.php

@@ -0,0 +1,26 @@
+<?php
+
+use Illuminate\Support\Facades\Log;
+use Spatie\LaravelCipherSweet\Tests\TestClasses\User;
+use Spatie\LaravelCipherSweet\Tests\TestClasses\UserObserver;
+
+
+it('whatever', function () {
+    $user = User::create([
+        'name' => 'John Doe',
+        'password' => bcrypt('password'),
+        'email' => '[email protected]',
+    ]);
+
+    Log::spy();
+    User::observe(UserObserver::class);
+    $user->update(['email' => '[email protected]']);
+
+    Log::shouldHaveReceived('info')
+        ->with("saving: dirty=2")
+        ->once();
+
+    Log::shouldHaveReceived('info')
+        ->with("saved: dirty=2")
+        ->once();
+});

tests/TestClasses/UserObserver.php

@@ -0,0 +1,19 @@
+<?php
+namespace Spatie\LaravelCipherSweet\Tests\TestClasses;
+
+class UserObserver
+{
+    public function saved(User $user)
+    {
+        $msg = "saved: dirty=".sizeof($user->getDirty());
+        \Log::info($msg);
+    }
+
+    public function saving(User $user)
+    {
+        $user->name .=".";
+
+        $msg = "saving: dirty=".sizeof($user->getDirty());
+        \Log::info($msg);
+    }
+}