Merge pull request #7 from wagng/unit-test

Unit test

Author: Gang Wang

.babelrc

@@ -0,0 +1,30 @@
+#
+# Check https://circleci.com/docs/2.0/language-javascript/ for more details
+#
+version: 2
+jobs:
+  build:
+    docker:
+      - image: circleci/node:8.10.0
+
+    working_directory: ~/repo
+
+    steps:
+      - checkout
+
+      # Download and cache dependencies
+      - restore_cache:
+          keys:
+          - v1-dependencies-{{ checksum "package.json" }}
+          # fallback to using the latest cache if no exact match is found
+          - v1-dependencies-
+
+      - run: yarn install
+
+      - save_cache:
+          paths:
+            - node_modules
+          key: v1-dependencies-{{ checksum "package.json" }}
+        
+      # run tests!
+      - run: yarn test

.circleci/config.yml

@@ -1,3 +1,6 @@
 ./**/tests/*.js
 *.test.js
 ./**/__tests__/**/*.js
+__mocks__/**/*.js
+jest-setup.js
+babel.config.js

.eslintignore

@@ -52,3 +52,4 @@ buck-out/
 */fastlane/report.xml
 */fastlane/Preview.html
 */fastlane/screenshots
+.jest-cache

.gitignore

@@ -0,0 +1,2 @@
+jest
+  .mock('react-native-navigation', () => require.requireActual('./react-native-navigation'));

App.js

@@ -0,0 +1,3 @@
+export const Navigation = {
+  registerComponent: () => Promise.resolve()
+};

__mocks__/index.js

@@ -0,0 +1,19 @@
+// {
+//   "presets": ["env", "module:metro-react-native-babel-preset"],
+//   "plugins": [
+//     ["@babel/plugin-proposal-decorators", { "legacy": true }],
+//     "@babel/plugin-syntax-export-namespace-from",
+//     "transform-export-extensions"
+//   ]
+// }
+'use strict'
+
+module.exports = {
+  presets: ["env", "@babel/preset-env", "module:metro-react-native-babel-preset"],
+  plugins: [
+    "@babel/plugin-transform-modules-commonjs",
+    ["@babel/plugin-proposal-decorators", { "legacy": true }],
+    "@babel/plugin-syntax-export-namespace-from",
+    "transform-export-extensions"
+  ],
+};

__mocks__/react-native-navigation.js

@@ -0,0 +1,21 @@
+import './__mocks__';
+
+jest
+  .mock('Button', () => {
+    const RealComponent = require.requireActual('react-native-elements').Button;
+    return RealComponent;
+  });
+
+const emptyFn = () => {};
+const AnimatedValue = function() {
+  this.setValue = emptyFn;
+  this.setOffset = emptyFn;
+};
+
+const AnimatedValueXY = function() {};
+AnimatedValueXY.prototype.x = new AnimatedValue();
+AnimatedValueXY.prototype.y = new AnimatedValue();
+
+console.error = jest.genMockFunction();
+
+jest.resetModules();