packager-worker-for-buck: bundleCommand-test.js: add more consistency

Reviewed By: davidaurelio

Differential Revision: D6395673

fbshipit-source-id: 24516bd456a231708891e789f1d5aa5c18f4eeca

local-cli/__mocks__/fs.js

@@ -67,6 +67,7 @@ fs.readdir.mockImplementation((filepath, callback) => {
 });
 
 fs.readFile.mockImplementation(function(filepath, encoding, callback) {
+  filepath = path.normalize(filepath);
   callback = asyncCallback(callback);
   if (arguments.length === 2) {
     callback = encoding;
@@ -90,6 +91,7 @@ fs.readFile.mockImplementation(function(filepath, encoding, callback) {
 });
 
 fs.readFileSync.mockImplementation(function(filepath, encoding) {
+  filepath = path.normalize(filepath);
   const node = getToNode(filepath);
   if (isDirNode(node)) {
     throw new Error('Error readFileSync a dir: ' + filepath);
@@ -103,6 +105,7 @@ fs.readFileSync.mockImplementation(function(filepath, encoding) {
 fs.writeFile.mockImplementation(asyncify(fs.writeFileSync));
 
 fs.writeFileSync.mockImplementation((filePath, content, options) => {
+  filePath = path.normalize(filePath);
   if (options == null || typeof options === 'string') {
     options = {encoding: options};
   }

local-cli/__tests__/fs-mock-test.js

@@ -46,6 +46,12 @@ describe('fs mock', () => {
         fs.writeFileSync('/dir/test', 'foobar', 'utf8'),
       ).toThrowError('ENOENT: no such file or directory');
     });
+
+    it('properly normalizes paths', () => {
+      fs.writeFileSync('/test/foo/../bar/../../tadam', 'beep', 'utf8');
+      const content = fs.readFileSync('/glo/../tadam', 'utf8');
+      expect(content).toEqual('beep');
+    });
   });
 
   describe('mkdirSync()', () => {