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Edit File: SupportTesting.php

<?php

namespace Livewire\Features\SupportTesting;

use Illuminate\Validation\ValidationException;
use Livewire\Mechanisms\ComponentRegistry;
use Livewire\ComponentHook;
use Livewire\Component;

class SupportTesting extends ComponentHook
{
    static function provide()
    {
        if (! app()->environment('testing')) return;

if (class_exists('Laravel\Dusk\Browser')) {
            DuskTestable::provide();
        }

static::registerTestingMacros();
    }

function dehydrate($context)
    {
        $target = $this->component;

$errors = $target->getErrorBag();

if (! $errors->isEmpty()) {
            $this->storeSet('testing.errors', $errors);
        }
    }

function hydrate()
    {
        $this->storeSet('testing.validator', null);
    }

function exception($e, $stopPropagation) {
        if (! $e instanceof ValidationException) return;

$this->storeSet('testing.validator', $e->validator);
    }

protected static function registerTestingMacros()
    {
        // Usage: $this->assertSeeLivewire('counter');
        \Illuminate\Testing\TestResponse::macro('assertSeeLivewire', function ($component) {
            if (is_subclass_of($component, Component::class)) {
                $component = app(ComponentRegistry::class)->getName($component);
            }
            $escapedComponentName = trim(htmlspecialchars(json_encode(['name' => $component])), '{}');

\PHPUnit\Framework\Assert::assertStringContainsString(
                $escapedComponentName,
                $this->getContent(),
                'Cannot find Livewire component ['.$component.'] rendered on page.'
            );

return $this;
        });

// Usage: $this->assertDontSeeLivewire('counter');
        \Illuminate\Testing\TestResponse::macro('assertDontSeeLivewire', function ($component) {
            if (is_subclass_of($component, Component::class)) {
                $component = app(ComponentRegistry::class)->getName($component);
            }
            $escapedComponentName = trim(htmlspecialchars(json_encode(['name' => $component])), '{}');

\PHPUnit\Framework\Assert::assertStringNotContainsString(
                $escapedComponentName,
                $this->getContent(),
                'Found Livewire component ['.$component.'] rendered on page.'
            );

return $this;
        });

if (class_exists(\Illuminate\Testing\TestView::class)) {
            \Illuminate\Testing\TestView::macro('assertSeeLivewire', function ($component) {
                if (is_subclass_of($component, Component::class)) {
                    $component = app(ComponentRegistry::class)->getName($component);
                }
                $escapedComponentName = trim(htmlspecialchars(json_encode(['name' => $component])), '{}');

\PHPUnit\Framework\Assert::assertStringContainsString(
                    $escapedComponentName,
                    $this->rendered,
                    'Cannot find Livewire component ['.$component.'] rendered on page.'
                );

return $this;
            });

\Illuminate\Testing\TestView::macro('assertDontSeeLivewire', function ($component) {
                if (is_subclass_of($component, Component::class)) {
                    $component = app(ComponentRegistry::class)->getName($component);
                }
                $escapedComponentName = trim(htmlspecialchars(json_encode(['name' => $component])), '{}');

\PHPUnit\Framework\Assert::assertStringNotContainsString(
                    $escapedComponentName,
                    $this->rendered,
                    'Found Livewire component ['.$component.'] rendered on page.'
                );

return $this;
            });
        }
    }
}

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