AssertRequestRules.php

<?php


namespace Tests;


use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Validator;

trait AssertRequestRules
{
    protected function assertRequestRuleHasError($field, $value, FormRequest $request, array $attributes = [])
    {
        $result = $this->checkRequestRule($field, $value, $request, $attributes)->offsetExists($field);

        if ($result) {
            self::assertTrue($result, "Session missing error: $result");
        } else {
            $error = "This field '{$field}' don't contains error. \n";
            self::assertContains('true', $result ? 'true' : 'false', $error);
        }
    }

    protected function assertRequestRuleNoHasError($field, $value, FormRequest $request, array $attributes = [])
    {
        $collection = $this->checkRequestRule($field, $value, $request, $attributes);
        $result = $collection->offsetExists($field);

        if (!$result) {
            self::assertFalse($result, "Session missing error: $result");
        } else {
            $error = $this->getErrorMessage($field, $collection);
            self::assertContains('false', $result ? 'true' : 'false', $error);
        }
    }

    private function checkRequestRule($field, $value, FormRequest $request, array $attributes = []):Collection
    {
        $rules = $request->rules();
        $attributes = array_merge($attributes, [$field => $value]);
        $validator = Validator::make($attributes, $rules);
        $fails = $validator->errors();
        $collection = collect($fails);

        return $collection;
    }

    private function getErrorMessage($field, Collection $collection)
    {
        $error = "Errors in '${field}' field : \n";
        foreach ($collection[$field] as $ruleError) {
            $error .= " - {$ruleError} \n";
        }
        return $error;
    }
}