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React Native Firebase Mock
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1. Create a __mocks__ folder in the project's root (on the same level as of node_modules). | |
2. Inside __mocks__ folder, create a file named react-native-firebase.js and copy-paste the content from RNFirebaseMock.js in this gist to your react-native-firebase.js that you just created. |
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'use strict' | |
export class Database { | |
ref = (path) => { | |
if (!this[path]) { | |
this[path] = new Reference(path) | |
} | |
return this[path] | |
} | |
} | |
export class Reference { | |
constructor(path) { | |
this.path = path | |
this.snap = { val: () => this._val()} | |
this.data = null | |
} | |
_val = jest.fn(() => { | |
return this.data | |
}) | |
once = jest.fn((param, callback) => { | |
const promise = new Promise ((resolve, reject) => { | |
if (callback) { | |
callback(this.snap) | |
resolve() | |
} else { | |
resolve(this.snap) | |
} | |
}) | |
RNFirebase.promises.push(promise) | |
return promise | |
}) | |
on = jest.fn((param, callback) => { | |
const promise = new Promise ((resolve, reject) => { | |
if (callback) { | |
callback(this.snap) | |
resolve() | |
} else { | |
resolve(this.snap) | |
} | |
}) | |
RNFirebase.promises.push(promise) | |
return promise | |
}) | |
off = jest.fn((param, callback) => { | |
const promise = Promise.resolve() | |
RNFirebase.promises.push(promise) | |
return promise | |
}) | |
update = jest.fn((data) => { | |
const promise = Promise.resolve() | |
RNFirebase.promises.push(promise) | |
return promise | |
}) | |
remove = jest.fn(() => { | |
const promise = Promise.resolve() | |
RNFirebase.promises.push(promise) | |
return promise | |
}) | |
} | |
export class MockFirebase { | |
constructor() { | |
this.database = () => { | |
if (!this.databaseInstance) { | |
this.databaseInstance = new Database() | |
} | |
return this.databaseInstance | |
} | |
} | |
} | |
export default class RNFirebase { | |
static initializeApp() { | |
RNFirebase.firebase = new MockFirebase() | |
RNFirebase.promises = [] | |
return RNFirebase.firebase | |
} | |
static reset() { | |
RNFirebase.promises = [] | |
RNFirebase.firebase.databaseInstance = null | |
} | |
static waitForPromises() { | |
return Promise.all(RNFirebase.promises) | |
} | |
static analytics () {} | |
static app () {} | |
} |
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