now-we-test
Test your Now deployed Node.js lambdas locally
Last updated 3 months ago by lucasconstantino .
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Now we test

Build Status coverage oclif npm version

Temporary lib to help test Now.sh lambdas written in Node.js. It was created with the purpose to eventually be deprecated when now dev command is released.

Purpose

Help unit test and locally serve lambdas written to deploy using Now.

Installation

yarn add now-we-test --dev

Usage

For unit tests

In your unit tests, you can use the simulator helper to simulate a lambda execution environment without needing a running server:

import { simulator } from 'now-we-test'
import func from '../your-lambda-implementation'

const app = simulator(func)

describe('func', () => {
  it('should do something', async () => {
    const result = await app.get('/')

    expect(result.text).toBe('[the value returned by the lambda]')
  })
})

Signature:

simulator(
  fn: Function,
  [builder="@now/node"]: String
)

Alternatively to the default @now/node building evironment, you can also simulate a now-micro passing it as second parameter.

The result of the invokation of simulator helper is a SuperTest instance, so please refer to that documentation for details on possible assertions and usage.

For locally serving lambdas

Now we test provides a simple CLI to serve your lambdas locally - useful for testing integration with other tools.

Keep in mind there is only so much it can do in terms of simulation, so you should never completelly trust what works locally would necessarily work on Now.sh environment.

Commands

now-we-test serve

Serves the lambdas locally

USAGE
  $ now-we-test serve [PATH]

ARGUMENTS
  PATH  [default: .] The path to the directory where now.json stands

OPTIONS
  -f, --format=format  [default: combined] logger format (morgan compliant)
  -p, --port=port      [default: 3000] port to use

See code: lib/commands/serve.js

Only @now/node, @now/static, and now-micro builders are available so far.

now-we-test help [COMMAND]

display help for a now-we-test command

USAGE
  $ now-we-test help [COMMAND]

ARGUMENTS
  COMMAND  command to show help for

OPTIONS
  --all  see all commands in CLI

See code: @oclif/plugin-help

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