Fix tests

src/Concerns/HasAttributes.php

@@ -97,7 +97,7 @@ public function setAttribute(string $key, mixed $value): self
             $value = $value ? '1' : '0';
         }
 
-        $this->attributes[$key] = $value;
+        $this->attributes[$key] = (string) $value;
 
         return $this;
     }

tests/ModelTest.php

@@ -232,3 +232,40 @@
     expect(ModelStub::query())->toBeInstanceOf(Query::class);
     expect((new ModelStub)->newQuery())->toBeInstanceOf(Query::class);
 });
+
+it('can be refreshed', function () {
+    $model = ModelStub::create();
+
+    $model->name = 'John Doe';
+
+    $model->save();
+
+    $model->refresh();
+
+    expect($model->name)->toBe('John Doe');
+});
+
+it('can be refreshed with custom key', function () {
+    $model = ModelStubWithCustomKey::create(['custom' => 'foo']);
+
+    $model->custom = 'bar';
+
+    $model->save();
+
+    $model->refresh();
+
+    expect($model->custom)->toBe('bar');
+});
+
+it('can be re-retrieved with fresh', function () {
+    $model = ModelStub::create();
+
+    $model->name = 'John Doe';
+
+    $model->save();
+
+    $fresh = $model->fresh();
+
+    expect($fresh->is($model))->toBeTrue();
+    expect($fresh->name)->toBe('John Doe');
+});