Added singleton test

Author: auser

lib/modules/analytics.js

@@ -1,5 +1,6 @@
-
 import {NativeModules, NativeAppEventEmitter} from 'react-native';
+
+console.log('NativeModules ->', Object.keys(NativeModules).sort());
 const FirestackAnalytics = NativeModules.FirestackAnalytics;
 
 import promisify from '../utils/promisify'

lib/modules/base.js

@@ -5,7 +5,7 @@ import Log from '../utils/log'
 
 import {NativeModules, NativeEventEmitter, AsyncStorage} from 'react-native';
 const FirestackModule = NativeModules.Firestack;
-const FirestackModuleEvt = new NativeEventEmitter(FirestackModule);
+let FirestackModuleEvt;
 
 import promisify from '../utils/promisify'
 
@@ -53,6 +53,9 @@ export class Base {
       //   this.eventHandlers[name] = {};
       // }
       if (!nativeModule) {
+        if (!FirestackModuleEvt) {
+          FirestackModuleEvt = new NativeEventEmitter(FirestackModule);
+        }
         nativeModule = FirestackModuleEvt;
       }
       const sub = nativeModule.addListener(name, cb);

lib/utils/__tests__/singleton-test.js

@@ -0,0 +1,40 @@
+jest.unmock('../singleton');
+
+import Singleton from '../singleton';
+import sinon from 'sinon'
+
+let created = 0;
+class TestClass extends Singleton {
+  constructor() {
+    super();
+    created += 1;
+  }
+
+  get namespace() {
+    return 'firestack:TestClass'
+  }
+}
+
+describe('singleton', () => {
+  let tc;
+
+  beforeEach(() => {
+    created = 0;
+    TestClass.reset();
+  })
+
+  it('creates an instance of the class', () => {
+    expect(created).toBe(0);
+    TestClass.instance
+    expect(created).toBe(1);
+  })
+
+  it('returns the singleton instance of the class when called a subsequent times', () => {
+    expect(created).toBe(0);
+    tc = TestClass.instance
+    let tc2 = TestClass.instance
+    expect(created).toBe(1);
+    expect(tc).toBe(tc2);
+  })
+
+});

lib/utils/singleton.js

@@ -1,25 +1,31 @@
 'use strict';
 
 const Symbol = require('es6-symbol');
-const singleton = Symbol('singleton');
+let singleton;
 
 class Singleton {    
   constructor() {
+    this.singleton = Symbol(this.namespace);
+
     let Class = this.constructor;
 
-    if(!Class[singleton]) {
-      Class[singleton] = this;
+    if(!Class[this.singleton]) {
+      Class[this.singleton] = this;
     }
 
-    return Class[singleton];
+    return Class[this.singleton];
   }
 
   static get instance() {
-    if(!this[singleton]) {
-      this[singleton] = new this;
+    if(!this[this.singleton]) {
+      this[this.singleton] = new this;
     }
 
-    return this[singleton];
+    return this[this.singleton];
+  }
+
+  static reset() {
+    delete this[this.singleton]
   }
 }
 

package.json

@@ -15,7 +15,11 @@
     "url": "https://github.com/fullstackreact/react-native-firestack.git"
   },
   "jest": {
-    "preset": "jest-react-native"
+    "preset": "jest-react-native",
+    "unmockedModulePathPatterns": [
+      "react-native",
+      "firestack"
+    ]
   },
   "license": "ISC",
   "keywords": [