moongoose js Schema is not a Constructor and function error - node.js

I am facing a problem with moongoose js
This is my node js code:
var mongoose=require('moongoose');
var test=mongoose.Schema({test:String})
module.exports = mongoose.model('test',test);
When I run this code, node js throws:
var test=mongoose.Schema({test:String})
^
TypeError: **mongoose.Schema is not a function**
at Object.<anonymous> (H:\TodoList\Model\TodoListModel.js:4:19)
at Module._compile (module.js:652:30)
at Object.Module._extensions..js (module.js:663:10)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
at Function.Module._load (module.js:497:3)
at Module.require (module.js:596:17)
at require (internal/module.js:11:18)
at Object.<anonymous> (H:\TodoList\app.js:9:10)
at Module._compile (module.js:652:30)
at Object.Module._extensions..js (module.js:663:10)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
at Function.Module._load (module.js:497:3)
at Function.Module.runMain (module.js:693:10)
at startup (bootstrap_node.js:188:16)
If I change this code to this format:
var mongoose=require('moongoose');
var Schema = mongoose.Schema;
var test=new Schema({test:String})
module.exports = mongoose.model('test',test);
That code throws:
TypeError: **Schema is not a constructor**
Please help me to resolve this code error.

Its require('mongoose'); you have written require('moongoose');
an o typo :))

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This is what my class looks like:
import * as bluebird from 'bluebird';
import { Application } from 'express';
import { connect, connection, disconnect, mongo } from 'mongoose';
import * as mongoose from 'mongoose';
import 'reflect-metadata'; // this shim is required for routing-controllers
import { createExpressServer, useContainer } from 'routing-controllers';
import { Container } from 'typedi';
import { getEnv } from './Service/Env';
// middleware
import { AuthenticateTokenMiddleware } from './Middleware/AuthenticateTokenMiddleware';
import { CorsHeadersMiddleware } from './Middleware/CorsHeadersMiddleware';
import { DisableAllExceptGetMiddleware } from './Middleware/DisableAllExceptGetMiddleware';
import { ParseTokenMiddleware } from './Middleware/ParseTokenMiddleware';
// controllers
import { init } from 'ooyala-express';
import { AudioController } from './Controller/V1/AudioController';
import { MovieController } from './Controller/V1/MovieController';
import { RootController } from './Controller/V1/RootController';
import { Indexer } from './indexer';
class App {
public express: Application;
constructor() {
(<any> mongoose).Promise = bluebird;
connect(getEnv('MONGODB_URI'), { useMongoClient: true });
useContainer(Container);
Indexer.ensureIndexes();
init({
ooyala_api_host: getEnv('ooyala_api_host'),
ooyala_cdn_host: getEnv('ooyala_cdn_host'),
ooyala_rights_locker_host: getEnv('ooyala_rights_locker_host'),
ooyala_player_host: getEnv('ooyala_player_host'),
player_expiration_window: getEnv('player_expiration_window'),
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// If they fix the issue with Expose/Exclude not being respected then
// perhaps this could be set back to true
classTransformer: false,
controllers: [
RootController,
AudioController,
MovieController,
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middlewares: [
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CorsHeadersMiddleware,
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AuthenticateTokenMiddleware,
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}
}
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