babel and jest

.babelrc

@@ -0,0 +1,5 @@
+{
+  "presets": [
+    "react-native"
+  ]
+}

package.json

@@ -21,11 +21,12 @@
   "scripts": {
     "build": ":",
     "lint": "eslint src2",
-    "test:js": "jest",
+    "test:js": "jest --coverage",
     "test:android": "cd android && ./gradlew clean testDebugUnitTest",
     "test:ios": ":",
     "pretest": "npm run lint",
     "test": "npm run test:js && npm run test:android && npm run test:ios",
+    "test:watch": "jest --coverage --watch",
     "release": ": #npm version prerelease && npm publish --tag next && npm view react-native-navigation dist-tags && git push"
   },
   "peerDependencies": {
@@ -49,5 +50,9 @@
     "eslint-plugin-react-native": "2.x.x",
     "jest": "17.x.x",
     "jest-cli": "17.x.x"
+  },
+  "jest": {
+    "resetMocks": true,
+    "resetModules": true
   }
 }

src2/stores/props/store.js

@@ -0,0 +1,17 @@
+import _ from 'lodash';
+
+const state = {
+  propsByScreenId: {}
+};
+
+export const mutators = {
+  setPropsForScreenId(screenId, props) {
+    _.set(state.propsByScreenId, screenId, props);
+  }
+};
+
+export const selectors = {
+  getPropsForScreenId(screenId) {
+    return _.get(state.propsByScreenId, screenId, {});
+  }
+};

src2/stores/props/store.test.js

@@ -0,0 +1,22 @@
+describe('stores/props/store', () => {
+  let uut;
+
+  beforeEach(() => {
+    uut = require('./store');
+  });
+
+  it('initial state', () => {
+    expect(uut.selectors.getPropsForScreenId('screen1')).toEqual({});
+  });
+
+  it('holds props by screenId', () => {
+    uut.mutators.setPropsForScreenId('screen1', {a: 1, b: 2});
+    expect(uut.selectors.getPropsForScreenId('screen1')).toEqual({a: 1, b: 2});
+  });
+
+  it('defensive for invalid screenId and props', () => {
+    uut.mutators.setPropsForScreenId('screen1', undefined);
+    uut.mutators.setPropsForScreenId(undefined, undefined);
+    expect(uut.selectors.getPropsForScreenId('screen1')).toEqual({});
+  });
+});

wallaby.js

@@ -0,0 +1,30 @@
+/*eslint-disable*/
+'use strict';
+const babelOptions = JSON.parse(require('fs').readFileSync(`${__dirname}/.babelrc`));
+module.exports = function(wallaby) {
+  return {
+    env: {
+      type: 'node',
+      runner: 'node'
+    },
+
+    testFramework: 'jest',
+
+    files: [
+      'src2/**/*.js',
+      '!src2/**/*.test.js'
+    ],
+
+    tests: [
+      'src2/**/*.test.js'
+    ],
+
+    compilers: {
+      '**/*.js': wallaby.compilers.babel(babelOptions)
+    },
+
+    setup: function(w) {
+      require('babel-polyfill');
+    }
+  };
+};