Revert adding optional value to fail-fast option

src/Codeception/Codecept.php

@@ -133,7 +133,7 @@ public function registerSubscribers()
             $this->dispatcher->addSubscriber(new Subscriber\Console($this->options));
         }
         if ($this->options['fail-fast']) {
-            $this->dispatcher->addSubscriber(new Subscriber\FailFast($this->options['fail-fast']));
+            $this->dispatcher->addSubscriber(new Subscriber\FailFast());
         }
 
         if ($this->options['coverage']) {

src/Codeception/Command/Run.php

@@ -82,7 +82,7 @@
  *  --skip (-s)           Skip selected suites (multiple values allowed)
  *  --skip-group (-x)     Skip selected groups (multiple values allowed)
  *  --env                 Run tests in selected environments. (multiple values allowed, environments can be merged with ',')
- *  --fail-fast (-f)      Stop after nth failure (defaults to 1)
+ *  --fail-fast (-f)      Stop after first failure
  *  --no-rebuild          Do not rebuild actor classes on start
  *  --help (-h)           Display this help message.
  *  --quiet (-q)          Do not output any message. Almost the same as `--silent`
@@ -214,7 +214,7 @@ protected function configure()
                 InputOption::VALUE_IS_ARRAY | InputOption::VALUE_REQUIRED,
                 'Run tests in selected environments.'
             ),
-            new InputOption('fail-fast', 'f', InputOption::VALUE_OPTIONAL, 'Stop after nth failure'),
+            new InputOption('fail-fast', 'f', InputOption::VALUE_NONE, 'Stop after first failure'),
             new InputOption('no-rebuild', '', InputOption::VALUE_NONE, 'Do not rebuild actor classes on start'),
             new InputOption(
                 'seed',
@@ -326,10 +326,6 @@ public function execute(InputInterface $input, OutputInterface $output)
         if (!$userOptions['ansi'] && $input->getOption('colors')) {
             $userOptions['colors'] = true; // turn on colors even in non-ansi mode if strictly passed
         }
-        // array key will exist if fail-fast option is used
-        if (array_key_exists('fail-fast', $userOptions)) {
-            $userOptions['fail-fast'] = (int) $this->options['fail-fast'] ?: 1;
-        }
 
         $suite = $input->getArgument('suite');
         $test = $input->getArgument('test');

src/Codeception/Subscriber/FailFast.php

@@ -2,7 +2,6 @@
 namespace Codeception\Subscriber;
 
 use Codeception\Event\SuiteEvent;
-use Codeception\Event\TestEvent;
 use Codeception\Events;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 
@@ -11,33 +10,12 @@ class FailFast implements EventSubscriberInterface
     use Shared\StaticEvents;
 
     public static $events = [
-        Events::TEST_FAIL => 'stopOnFail',
-        Events::TEST_ERROR => 'stopOnFail',
-        Events::SUITE_BEFORE => 'cacheSuite'
+        Events::SUITE_BEFORE => 'stopOnFail',
     ];
 
-    private $failureCount = 0;
-
-    private $stopFailureCount;
-
-    private $suiteCache;
-
-    public function __construct($stopFailureCount)
-    {
-        $this->stopFailureCount = (int) $stopFailureCount;
-    }
-
-    public function cacheSuite(SuiteEvent $e)
+    public function stopOnFail(SuiteEvent $e)
     {
-        $this->suiteCache = $e->getResult();
-    }
-
-    public function stopOnFail(TestEvent $e)
-    {
-        $this->failureCount++;
-
-        if ($this->failureCount >= $this->stopFailureCount) {
-            $this->suiteCache->stop();
-        }
+        $e->getResult()->stopOnError(true);
+        $e->getResult()->stopOnFailure(true);
     }
 }

tests/cli/RunCest.php

@@ -296,24 +296,16 @@ public function runOneGroupWithDataProviders(\CliGuy $I)
         $I->seeInShellOutput("OK");
     }
 
-    public function runTestWithFailFastDefault(\CliGuy $I)
+    public function runTestWithFailFast(\CliGuy $I)
     {
-        $I->executeCommand('run unit --skip-group error --skip-group multiple-fail --no-exit');
+        $I->executeCommand('run unit --skip-group error --no-exit');
         $I->seeInShellOutput('FailingTest: Me');
         $I->seeInShellOutput("PassingTest: Me");
-        $I->executeCommand('run unit --fail-fast --skip-group error --skip-group multiple-fail --no-exit');
+        $I->executeCommand('run unit --fail-fast --skip-group error --no-exit');
         $I->seeInShellOutput('There was 1 failure');
         $I->dontSeeInShellOutput("PassingTest: Me");
     }
 
-    public function runTestWithFailFastCustom(\CliGuy $I)
-    {
-        $I->executeCommand('run unit MultipleFailingTest.php --fail-fast=2 --no-exit');
-        $I->seeInShellOutput('There were 2 failures');
-        $I->executeCommand('run unit MultipleFailingTest.php --no-exit');
-        $I->seeInShellOutput('There were 3 failures');
-    }
-
     public function runWithCustomOutputPath(\CliGuy $I)
     {
         $I->executeCommand('run dummy --xml myverycustom.xml --html myownhtmlreport.html');

tests/data/claypit/tests/unit/FailingTest.php

@@ -6,4 +6,5 @@ public function testMe()
     {
         $this->assertFalse(true);
     }
-}
+
+}