Object of class could not be converted to int - php

Question

I want to write phpunit test for save method at my repository. My repo code is:
public function saveCustomer(Custom $custom)
{
try
{
$custom->save();
return array(
'status' => true,
'customerId' => $custom->getId()
);
}
catch(\Exception $e)
{
return array(
'status' => false,
'customerId' => 0
);
}
}
I wrote this test:
public function testSaveNewUye()
{
$request = array(
'email' => 'www#www.com',
'phone' => '555 555 555',
'password' => '34636'
);
$repo = new CustomerRepository();
$result_actual = $this->$repo->saveCustomer($request);
$result_expected = array(
'status' => true,
'customerId' => \DB::table('custom')->select('id')->orderBy('id', 'DESC')->first() + 1
);
self::assertEquals($result_expected, $result_actual);
}
I got the error given below:
ErrorException: Object of class App\CustomerRepository could not be converted to int
Can you help me?

Answer 1

Problem is here:
$repo = new CustomerRepository();
$result_actual = $this->$repo->saveCustomer($request);
You are assigning and using variables not the same.
Try like this instead:
$this->repo = new CustomerRepository();
// ^------- assign to `$this`
$result_actual = $this->repo->saveCustomer($request);
// ^------- remove `$`
When doing $this->$repo-> PHP tries to convert the (object) $repo to a string $this->(object)-> which does not work.
Then you have a second error here:
\DB::table('custom')->select('id')->orderBy('id', 'DESC')->first() + 1
From the database you get an object (instanceof stdClass) which you cannot simply + 1.
The whole thing is probably something like
\DB::table('custom')->select('id')->orderBy('id', 'DESC')->first()->id + 1
(From the returned object, you want the property id.)