Yarn workspaces

Summary:
1) moved "sonar/desktop/src" to "sonar/desktop/app/src", so "app" is now a separate package containing the core Flipper app code
2) Configured yarn workspaces with the root in "sonar/desktop": app, static, pkg, doctor, headless-tests. Plugins are not included for now, I plan to do this later.

Reviewed By: jknoxville

Differential Revision: D20535782

fbshipit-source-id: 600b2301960f37c7d72166e0d04eba462bec9fc1

desktop/app/src/utils/__tests__/jsonFileStorage.node.js

@@ -0,0 +1,40 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import JsonFileStorage from '../jsonFileReduxPersistStorage.tsx';
+import fs from 'fs';
+
+const validSerializedData = fs
+  .readFileSync('app/src/utils/__tests__/data/settings-v1-valid.json')
+  .toString()
+  .replace(/\r\n/g, '\n')
+  .trim();
+
+const validDeserializedData =
+  '{"androidHome":"\\"/opt/android_sdk\\"","something":"{\\"else\\":4}","_persist":"{\\"version\\":-1,\\"rehydrated\\":true}"}';
+
+const storage = new JsonFileStorage(
+  'app/src/utils/__tests__/data/settings-v1-valid.json',
+);
+
+test('A valid settings file gets parsed correctly', () => {
+  return storage
+    .getItem('anykey')
+    .then(result => expect(result).toEqual(validDeserializedData));
+});
+
+test('deserialize works as expected', () => {
+  const deserialized = storage.deserializeValue(validSerializedData);
+  expect(deserialized).toEqual(validDeserializedData);
+});
+
+test('serialize works as expected', () => {
+  const serialized = storage.serializeValue(validDeserializedData);
+  expect(serialized).toEqual(validSerializedData);
+});