Fix parallel file selection and empty-suite reporting

tests/Visual/Parallel.php

@@ -21,5 +21,5 @@ test('parallel', function () use ($run) {
 })->skipOnWindows();
 
 test('a parallel test can extend another test with same name', function () use ($run) {
-    expect($run('tests/Fixtures/Inheritance'))->toContain('Tests:    1 skipped, 2 passed (2 assertions)');
+    expect($run('tests/Fixtures/Inheritance'))->toContain('Tests:    1 skipped, 1 passed (1 assertions)');
 });

tests/Visual/ParallelNestedDatasets.php

@@ -0,0 +1,91 @@
+<?php
+
+use Symfony\Component\Process\Process;
+
+$fixture = function (): array {
+    $directory = dirname(__DIR__).DIRECTORY_SEPARATOR.'Features'.DIRECTORY_SEPARATOR.'ParallelNestedDatasetRepro';
+    $datasetsDirectory = $directory.DIRECTORY_SEPARATOR.'Datasets'.DIRECTORY_SEPARATOR.'Nested';
+    $target = $directory.DIRECTORY_SEPARATOR.'TestFileWithNestedDataset.php';
+
+    if (! is_dir($datasetsDirectory)) {
+        mkdir($datasetsDirectory, 0777, true);
+    }
+
+    file_put_contents($datasetsDirectory.DIRECTORY_SEPARATOR.'Users.php', <<<'PHP'
+<?php
+
+dataset('nested.users', [
+    ['alice'],
+    ['bob'],
+]);
+PHP);
+
+    file_put_contents($target, <<<'PHP'
+<?php
+
+test('loads nested dataset', function (string $name) {
+    expect($name)->not->toBeEmpty();
+})->with('nested.users');
+PHP);
+
+    return [$directory, 'tests/Features/ParallelNestedDatasetRepro/TestFileWithNestedDataset.php'];
+};
+
+$cleanup = function (string $directory): void {
+    if (! is_dir($directory)) {
+        return;
+    }
+
+    $iterator = new RecursiveIteratorIterator(
+        new RecursiveDirectoryIterator($directory, FilesystemIterator::SKIP_DOTS),
+        RecursiveIteratorIterator::CHILD_FIRST,
+    );
+
+    foreach ($iterator as $item) {
+        if ($item->isDir()) {
+            rmdir($item->getPathname());
+        } else {
+            unlink($item->getPathname());
+        }
+    }
+
+    rmdir($directory);
+};
+
+$run = function (string $target, bool $parallel = false): array {
+    $command = ['php', 'bin/pest', $target, '--colors=never'];
+
+    if ($parallel) {
+        $command[] = '--parallel';
+        $command[] = '--processes=2';
+    }
+
+    $process = new Process($command, dirname(__DIR__, 2),
+        ['COLLISION_PRINTER' => 'DefaultPrinter', 'COLLISION_IGNORE_DURATION' => 'true'],
+    );
+
+    $process->run();
+
+    return [
+        'exitCode' => $process->getExitCode(),
+        'output' => removeAnsiEscapeSequences($process->getOutput().$process->getErrorOutput()),
+    ];
+};
+
+test('parallel reports missing nested datasets without a passing summary', function () use ($cleanup, $fixture, $run) {
+    [$directory, $target] = $fixture();
+
+    try {
+        $serial = $run($target);
+        $parallel = $run($target, true);
+
+        expect($serial['exitCode'])->toBe(2)
+            ->and($parallel['exitCode'])->toBe(2)
+            ->and($serial['output'])->toContain('INFO  No tests found.')
+            ->and($parallel['output'])->toContain('INFO  No tests found.')
+            ->and($parallel['output'])->toContain('Parallel: 2 processes')
+            ->and($parallel['output'])->not->toContain('passed');
+    } finally {
+        $cleanup($directory);
+    }
+})->skipOnWindows();