Accessing Properties from Classes inside of traits - php

Question

I'm trying to write a unit test for the startedAt() method using mocks however the problem I'm facing is that I don't think I can access the builder instance from inside that startedAt() method.
To test the startedAt() method I created a fixture class called ExampleFilters and had it extend the parent class of Filters. Inside of the ExampleFilters class I import the FiltersByStartDate trait.
Does anyone have any suggestions on how I can access the builder property from the FiltersByStartDate trait?
Any ideas on this?
<?php
namespace App\Filters\Concerns;
trait FiltersByStartDate
{
/**
* Filter a query to include models of a specific date started.
*
* #param array $startedAt
* #return \Illuminate\Database\Eloquent\Builder
*/
public function startedAt($startedAt)
{
if (isset($startedAt[1])) {
$this->builder->whereHas('currentEmployment', function ($query) use ($startedAt) {
$query->whereBetween('started_at', [
$startedAt[0],
$startedAt[1]
]);
});
} else {
$this->builder->whereHas('currentEmployment', function ($query) use ($startedAt) {
$query->whereDate('started_at', $startedAt[0]);
});
}
return $this->builder;
}
}
<?php
namespace Tests\Fixtures;
use App\Filters\Concerns\FiltersByStartDate;
use App\Filters\Filters;
class ExampleFilters extends Filters
{
use FiltersByStartDate;
}
<?php
namespace App\Filters;
use Illuminate\Http\Request;
abstract class Filters
{
/**
* #var \Illuminate\Http\Request
*/
protected $request;
/**
* The Eloquent builder.
*
* #var \Illuminate\Database\Eloquent\Builder
*/
protected $builder;
/**
* Registered filters to operate upon
*
* #var array
*/
protected $filters = [];
/**
* Create a new class instance.
*
* #param \Illuminate\Http\Request $request
*/
public function __construct(Request $request)
{
$this->request = $request;
}
/**
* Apply the filters.
*
* #param \Illuminate\Database\Eloquent\Builder $builder
* #return \Illuminate\Database\Eloquent\Builder
*/
public function apply($builder)
{
$this->builder = $builder;
foreach ($this->getFilters() as $filter => $value) {
if (method_exists($this, $filter)) {
$this->$filter($value);
}
}
return $this->builder;
}
/**
* Fetch all relevant filters from the request.
*
* #return array
*/
public function getFilters()
{
return array_filter($this->request->only($this->filters));
}
}
<?php
namespace Tests\Unit\Filters\Concerns;
use Illuminate\Database\Query\Builder;
use Tests\Fixtures\ExampleFilters;
use Tests\TestCase;
/*
* #group filters
*/
class FiltersByStartDateTest extends TestCase
{
/* #var Tests\Fixtures\ExampleFilters */
protected $subject;
public function setUp(): void
{
$this->subject = app(ExampleFilters::class);
}
/** #test */
public function models_can_be_filtered_by_their_start_date()
{
// $this->markTestIncomplete();
$dateSet = ['2020-01-01 00:00:00'];
$mock = \Mockery::mock(Builder::class)
->shouldReceive('whereHas', \Mockery::any())
->shouldReceive('whereDate')
->withArgs(['started_at', $dateSet])
->once()
->andReturn(true)
->getMock();
dd($this->subject->startedAt($dateSet));
$builderMockFromDate = $this->subject->startedAt($dateSet);
$this->assertSame($builderMockFromDate, $mock);
}
}