refactor(feed): update FeedCommand.php and FeedCommandTest.php

- Updated FeedCommand.php to set the modified date
- Added Process facade to FeedCommand.php for running git diff command
- Updated the test cases in FeedCommandTest.php to throw specific exceptions

app/Commands/FeedCommand.php

@@ -17,6 +17,7 @@
 use Illuminate\Support\Collection;
 use Illuminate\Support\Facades\Date;
 use Illuminate\Support\Facades\File;
+use Illuminate\Support\Facades\Process;
 use Laminas\Feed\Writer\Feed;
 
 /**
@@ -84,16 +85,20 @@ static function (Collection $carry, string $line) use (&$date): Collection {
                     $feed->addEntry($entry);
                 });
 
-                $feed->count()
-                    ? $feed->setDateModified($feed->getEntry()->getDateModified())
-                    : $feed->setDateModified(new \DateTimeImmutable);
+                $feed->setDateModified($feed->getEntry()->getDateModified());
 
                 foreach (['atom', 'rss'] as $type) {
                     $name = "README.$type";
                     $feed->setFeedLink("https://raw.githubusercontent.com/guanguans/favorite-link/master/$name", $type);
                     File::put(base_path($name), $feed->export($type));
                 }
             })
+            ->tap(fn () => Process::run(
+                'git diff --color README.*',
+                function (string $type, string $line): void {
+                    $this->output->write($line);
+                }
+            ))
             ->tap(fn () => $this->output->success('Feed is done!'));
     }
 

tests/Feature/FeedCommandTest.php

@@ -16,14 +16,14 @@
 
 use App\Commands\FeedCommand;
 
-it('will throw an InvalidArgumentException', function (): void {
+it('will throw an InvalidArgumentException of Symfony', function (): void {
     $this->artisan(FeedCommand::class, ['--from' => $this->faker()->filePath()]);
 })->group(__DIR__, __FILE__)->throws(\Symfony\Component\Console\Exception\InvalidArgumentException::class);
 
-it('can generate empty feed', function (): void {
+it('will throw an InvalidArgumentException of Laminas', function (): void {
     $this->artisan(FeedCommand::class, ['--from' => fixtures_path('README.md')])->assertOk();
-})->group(__DIR__, __FILE__);
+})->group(__DIR__, __FILE__)->throws(\Laminas\Feed\Writer\Exception\InvalidArgumentException::class);
 
 it('can generate feed', function (): void {
     $this->artisan(FeedCommand::class)->assertOk();
-})->group(__DIR__, __FILE__)->depends('it can generate empty feed');
+})->group(__DIR__, __FILE__);