yojeek / Nats-Mock

Nats-Mock

Usage

Create an instance of Mock:

const NatsMock = require('./');

const options = {
    maxReconnectAttempts: -1,
    reconnectTimeWait: 250,
    url: 'nats://localhost:4222',
    group: 'natsMock',
    requestTimeout: 100,
};

const mock = new NatsMock(options);

or attach to existed Tasu instance

const Nats = require('tasu');
const NatsMock = require('./');

const options = {
    maxReconnectAttempts: -1,
    reconnectTimeWait: 250,
    url: 'nats://localhost:4222',
    group: 'natsMock',
    requestTimeout: 100,
};

const nats=new Nats(options);
const mock = new NatsMock(nats);

ensure that it's connected to NATS server

await mock.connected();

set up onetime mock

const onceMock = mock.once('mockTest.once')
        .req({a: 1, b: 2})
        .res({result: true});

or persistent one

const persistMock = mock.persist('mockTest.once')
        .req({a: 1, b: 2})
        .res({result: true});

Request validation

Passing exact object (compared using lodash.isEqual)

const persistMock = mock.persist('mockTest.once')
        .req({a: 1, b: 2})
        .res({result: true});

Passing function

const persistMock = mock.persist('mockTest.once')
        .req((data)=> data.someField === 'some value')
        .res({result: true});

Passing async function

const persistMock = mock.persist('mockTest.once')
        .req((data)=> await someAsyncFunction(data))
        .res({result: true});

Return result

        .res({result: true, value: 'some value'});

Checking result

assert.isOk(onceMock.isDone());

assert.equal(persistMock.numOfCalls, 2);

Other

if you have other questions: @see tests.js