Scheduler - fixed wrong number of processes for 1 job

Author: ondrejmirtes

src/Parallel/ParallelAnalyser.php

@@ -184,6 +184,10 @@ public function analyse(
 
 		$loop->run();
 
+		if (count($jobs) > 0) {
+			throw new \PHPStan\ShouldNotHappenException('Some jobs remaining');
+		}
+
 		return new AnalyserResult(
 			$errors,
 			$internalErrors,

src/Parallel/Scheduler.php

@@ -34,7 +34,7 @@ public function scheduleWork(
 	{
 		$jobs = array_chunk($files, $this->jobSize);
 		$numberOfProcesses = min(
-			(int) floor(count($jobs) / $this->minimumNumberOfJobsPerProcess),
+			max((int) floor(count($jobs) / $this->minimumNumberOfJobsPerProcess), 1),
 			$cpuCores
 		);
 

tests/PHPStan/Parallel/SchedulerTest.php

@@ -55,6 +55,15 @@ public function dataSchedule(): array
 				2,
 				[30, 30, 30, 30, 4],
 			],
+			[
+				16,
+				16,
+				2,
+				20,
+				1,
+				1,
+				[1],
+			],
 		];
 	}