get adb config from env vars

Summary:
REact adb config from env vars:
- `ADB_SERVER_SOCKET`
- `ANDROID_ADB_SERVER_PORT`

Reviewed By: lawrencelomax

Differential Revision: D14002603

fbshipit-source-id: e30fa4354ab15048d4350654979fd0b6f394cd89

src/utils/__tests__/adbConfig.js

@@ -0,0 +1,45 @@
+/**
+ * Copyright 2018-present Facebook.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ * @format
+ */
+
+import adbConfig from '../adbConfig';
+
+test('get host and port from ADB_SERVER_SOCKET', () => {
+  process.env.ANDROID_ADB_SERVER_PORT = undefined;
+  process.env.ADB_SERVER_SOCKET = 'tcp:127.0.0.1:5037';
+  const {port, host} = adbConfig();
+  expect(port).toBe(5037);
+  expect(host).toBe('127.0.0.1');
+});
+
+test('get IPv6 address from ADB_SERVER_SOCKET', () => {
+  process.env.ANDROID_ADB_SERVER_PORT = undefined;
+  process.env.ADB_SERVER_SOCKET = 'tcp::::1:5037';
+  const {host} = adbConfig();
+  expect(host).toBe(':::1');
+});
+
+test('get port from ANDROID_ADB_SERVER_PORT', () => {
+  process.env.ANDROID_ADB_SERVER_PORT = '1337';
+  process.env.ADB_SERVER_SOCKET = undefined;
+  const {port} = adbConfig();
+  expect(port).toBe(1337);
+});
+
+test('prefer ADB_SERVER_SOCKET over ANDROID_ADB_SERVER_PORT', () => {
+  process.env.ANDROID_ADB_SERVER_PORT = '1337';
+  process.env.ADB_SERVER_SOCKET = 'tcp:127.0.0.1:5037';
+  const {port} = adbConfig();
+  expect(port).toBe(5037);
+});
+
+test('have defaults', () => {
+  process.env.ANDROID_ADB_SERVER_PORT = undefined;
+  process.env.ADB_SERVER_SOCKET = undefined;
+  const {port, host} = adbConfig();
+  expect(port).toBe(5037);
+  expect(host).toBe('localhost');
+});