updating test

Author: weaverryan

tests/Update/RecipePatcherTest.php

@@ -33,6 +33,13 @@ protected function setUp(): void
      */
     public function testGeneratePatch(array $originalFiles, array $newFiles, string $expectedPatch)
     {
+        $this->getFilesystem()->remove(FLEX_TEST_DIR);
+        $this->getFilesystem()->mkdir(FLEX_TEST_DIR);
+        // original files need to be present to avoid patcher thinking they were deleting and skipping patch
+        foreach ($originalFiles as $file => $contents) {
+            touch(FLEX_TEST_DIR.'/'.$file);
+        }
+
         $patcher = new RecipePatcher(FLEX_TEST_DIR, $this->createMock(IOInterface::class));
 
         $patch = $patcher->generatePatch($originalFiles, $newFiles);