fix: exhaust output when waiting fake process

Author: innocenzi

packages/process/src/Testing/InvokedTestingProcess.php

@@ -134,6 +134,10 @@ public function wait(?callable $output = null): ProcessResult
             return $this->getProcessResult();
         }
 
+        // @mago-expect best-practices/no-empty-loop
+        while ($this->invokeOutputHandlerWithNextLineOfOutput()) {
+        }
+
         $this->remainingRunIterations = 0;
 
         return $this->getProcessResult();

packages/process/tests/PoolTest.php

@@ -46,7 +46,6 @@ public function test_concurrently(): void
             'echo world',
         ]);
 
-        var_dump($results, $results->count());
         $this->assertSame(2, $results->count());
         $this->assertStringEqualsStringIgnoringLineEndings("hello\n", $results[0]->output);
         $this->assertStringEqualsStringIgnoringLineEndings("world\n", $results[1]->output);