vendor and env first commit

vendor/brianium/paratest/src/Coverage/CoverageMerger.php

@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ParaTest\Coverage;
+
+use SebastianBergmann\CodeCoverage\CodeCoverage;
+use SplFileInfo;
+
+use function assert;
+
+/** @internal */
+final class CoverageMerger
+{
+    public function __construct(
+        private readonly CodeCoverage $coverage
+    ) {
+    }
+
+    public function addCoverageFromFile(SplFileInfo $coverageFile): void
+    {
+        if (! $coverageFile->isFile() || $coverageFile->getSize() === 0) {
+            return;
+        }
+
+        /** @psalm-suppress UnresolvableInclude **/
+        $coverage = include $coverageFile->getPathname();
+        assert($coverage instanceof CodeCoverage);
+
+        $this->coverage->merge($coverage);
+    }
+}