tests/Feature/ProfileTest.php: test that user can not set an empty password hash.

tests/Feature/ProfileTest.php

@@ -85,6 +85,26 @@ class ProfileTest extends TestCase
         ]);
     }
 
+    public function test_user_can_not_set_empty_password_hash()
+    {
+        $user = User::factory()->create([ 'password' => NULL ]);
+
+        $response = $this->actingAs($user)
+            ->post(route('profile.update'), [
+                'username' => $user->username,
+                'current_password' => '',
+                'password' => '',
+                'password_confirmation' => ''
+            ]);
+
+        $response->assertRedirect(route('profile.index'));
+
+        $this->assertDatabaseHas('users', [
+            'id' => $user->id,
+            'password' => NULL
+        ]);
+    }
+
     public function test_guest_can_not_update()
     {
         $response = $this->post(route('profile.update'), [