public function testInvokeFlow()
{
$file = $this->makeFile('copys/invoke/source/file', 'some text');
$target = $this->makeFile('copys/invoke/target/');
$flow = Flow::copyFiles($target);
$output = call_user_func($flow, new FileNodeCollection([$file]));
static::assertInstanceOf(FileNodeCollection::class, $output);
static::assertEquals(1, $output->count());
static::assertEquals('copys/invoke/target/file', $output->getAll()[0]->getPath());
static::assertTrue($file->exists(), "The original file should still exist");
}
