loopback-modeltester

Loopback 3.x JSON - Model/Routes Unit testing

Installation

npm install loopback-modeltester --save

Usage example

Configure a JSON file with all use cases and routes to test :

[
  {
    "title": "FileStorage - upload Method",
    "method": "POST",
    "model": "filestorages",
    "url": "upload",
    "expect": {
      "statusCode": 200,
      "bodyType": "Object",
      "properties": {
        "id": "String"
      },
      "headers": {
        "content-type": "application/json"
      }
    },
    "file": {
      "path": "./test/SUService.log",
      "form_name": "fichier"
    },
    "variables": {
      "id": {
        "name": "uploadedImageId",
        "required": true
      }
    }
  },
  {
    "title": "FileStorage - getInfos Method",
    "model": "filestorages",
    "url": "getInfos/${uploadedImageId}",
    "expect": {
      "statusCode": 200,
      "bodyType": "Object"
    }
  },
  {
    "title": "FileStorage - listObjects Method",
    "model": "filestorages",
    "url": "listObjects",
    "expect": {
      "statusCode": 200,
      "bodyType": "Array"
    }
  },
  {
    "title": "FileStorage - download Method",
    "model": "filestorages",
    "url": "download/${uploadedImageId}",
    "debug": true,
    "expect": {
      "statusCode": 200,
      "headers": {
        "content-type": "text/plain"
      }
    }
  },
  {
    "title": "FileStorage - deleteByName Method",
    "method": "DELETE",
    "model": "filestorages",
    "url": "deleteByName/${uploadedImageId}",
    "expect": {
      "statusCode": 200,
      "bodyType": "Object",
      "properties": {
        "count": "Number"
      },
      "headers": {
        "content-type": "application/json"
      }
    }
  }
]

Create a test/test.js file at the root of your project with this content

'use strict';

// Setup manually dev env (setup the env here, or not if not required).
process.env.NODE_ENV = 'development';

// Require Packages
const loopbackModelTester = require('loopback-modeltester');
const app = require('../server/server');
const fileStorageTest = require('../server/model-test.json'); // Require your JSON here!

try {
  loopbackModelTester(app, fileStorageTest);
} catch (E) {
  console.error(E);
}

Documentation

For each tests, all followings keys are allowed. All fields based upon JavaScript types are checked with the lib @sindresorhus/is (So check this package to be sure you entered the right type).

Key	Type	Default Value	Description
title	String	N.A	Test title
skip	Boolean	false	Skip or not the test
debug	Boolean	false	Debug the rest by logging headers and body properties
method	String	GET	The default HTTP Verbose method
model	String	N.A	The model name in the plural form
url	String	N.A	The request url
file	Object	N.A	FormData to upload a file
expect	Object	N.A	The expected response from the request
variables	Object	N.A	Variables to assign to the context based upon the Body response

Expect properties

Key	Type	Default Value	Description
statusCode	Number	200	The expected HTTP status code
bodyType	String	N.A	The expected body type (JavaScript)
headers	Object	N.A	All headers key expected, with the value not matched explicitely
properties	Object	N.A	All body properties expected

Properties values are JavaScript types..

Variables properties

Assign new variables into the context (to be used after with ${varName}). It useful when you want to create a chainable scenario.

Example

"variables": {
     "data[0]._id": {
          "required": true,
          "name": "user1_id"
     },
     "data[1]._id": {
          "required": true,
          "name": "user2_id"
     }
}