CliTester::run() returns int

Author: dg

src/Runner/CliTester.php

@@ -26,7 +26,7 @@ class CliTester
 	private ?string $stdoutFormat = null;
 
 
-	public function run(): ?int
+	public function run(): int
 	{
 		Environment::setupColors();
 		$this->setupErrors();
@@ -43,7 +43,7 @@ public function run(): ?int
 
 		if ($cmd->isEmpty() || $this->options['--help']) {
 			$cmd->help();
-			return null;
+			return 0;
 		}
 
 		$this->createPhpInterpreter();
@@ -53,7 +53,7 @@ public function run(): ?int
 			$job->setTempDirectory($this->options['--temp']);
 			$job->run();
 			echo $job->getTest()->stdout;
-			return null;
+			return 0;
 		}
 
 		$runner = $this->createRunner();
@@ -74,7 +74,7 @@ public function run(): ?int
 
 		if ($this->options['--watch']) {
 			$this->watch($runner);
-			return null;
+			return 0;
 		}
 
 		$result = $runner->run();