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Just-API

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Just-API is a declarative, specification based test framework for REST, GraphQL APIs. Users can test APIs without writing code, but they can also tap into code when they want to. It reads API test specification from YAML files and runs them in serial/parallel mode. Test reports can be generated in several formats including HTML and JSON.

In simple terms, users build a test suite by providing a set of request and response validation specification in a YAML file. Each suite can have one or more specs. Just-API builds the request, sends it to server and validates response as per the specification. One can choose to validate any or all of following

Status code
Headers
Cookies
Response JSON body
Response JSON schema

or Provide a custom Javascript function to validate the response

Find more here

Features

Runs test suites in parallel/serial mode
Supports all widely used HTTP methods
Supports x-www-form-urlencoded requests, Multipart requests, File uploads
Built-in Response Validation Constructs(Headers, Cookies, Status code, JSON body, JSON schema)
Custom Response validator functions
Supports running custom inline or module javascript sync/async functions
Supports Hooks (Before All, After All, Before Each, After Each, Before Test, After Test)
Custom suite configuration
Chained Request flows
Define/override Request path, query params, path params, headers, body at runtime
Suite and test context for reuse
Supports importing specs from one or more test suites
Intrasuite and Intersuite spec dependencies
Reusing test specification
Retry failed tests
Looping: Generate 'n' number of tests with a list
Built-in HTML, JSON reporters
Can generate reports in multiple formats for the same run
Logging HTTP request/response data for failed tests
Proper error reporting
Can run tests matching with a given pattern/string
Skipping tests with specification
Disable or Enable redirections
Reports test duration
Allows user to plug-in custom reporters

See all features

Getting Started

To run just-api, you will need Node.js v7.10.0 or newer.

Installation

$ npm install just-api

Following is a simple example showing usage of Just-API.

$ mkdir specs
$ vim specs/starwars_service.yml

Write following suite in your editor

meta:
  name: Star Wars suite
configuration:
  scheme: https
  host: swapi.co
  base_path: /api
specs:
  - name: get Luke Skywalker info
    request:
      path: /people/1/
      method: get
    response:
      status_code: 200
      headers:
        - name: content-type
          value: !!js/regexp application/json     
      json_data:
        - path: $.name
          value: Luke Skywalker

Back in the terminal

$ ./node_modules/.bin/just-api

   ✓ get Luke Skywalker info (1216ms)

  Done: specs/starwars_service.yml (Passed)

0 skipped, 0 failed, 1 passed (1 tests)
0 skipped, 0 failed, 1 passed (1 suites)
Duration: 1.3s

Testing GraphQL APIs

Following example tests a GraphQL API that returns location for a given ip address.

Create a YAML suite and run just-api.

meta:
  name: GraphQL Starwars service
configuration:
  host: swapi.graph.cool
  scheme: https
specs:
  - name: Get Details of a character
    request:
      method: post
      headers:
        - name: content-type
          value: application/json
      payload:
        body:
          type: json
          content:
            query: >
                   {
                    Person(name: "Luke Skywalker") {
                      name,
                      id,
                      gender
                     }
                    }
            variables: null
            operationName: null
    response:
      status_code: 200
      json_data:
        - path: $.data.Person.name
          value: "Luke Skywalker"

A chained request flow with hook and custom validation

When you need to test complex chained API flows, run dependencies in hooks to fetch pre-requisite data and pass it to actual test.

Following example shows how to run dependencies using a hook, get data and validating response with a custom validator function.

meta:
  name: Starwars suite
configuration:
  scheme: https
  host: swapi.co
  base_path: /api
specs:
  - name: get R2-D2 info
    request:
      path: /people/3/
      method: get
    response:
      status_code: 200
      json_data:
        - path: $.name
          value: R2-D2

  - name: search R2-D2 info
    before_test:
      run_type: inline
      inline:
        function: !js/asyncFunction >
          async function() {
            var response = await this.runSpec('get R2-D2 info');
            var jsonData = JSON.parse(response.body);
            this.test.query_params = { name:  jsonData.name };
          }
    request:
      path: /people
      method: get
    response:
      status_code: 200
      custom_validator:
        run_type: inline
        inline:
          function: !!js/function >
            function() {
              var jsonData = JSON.parse(this.response.body);
              var r2d2 = jsonData.results.find(result => result.name === 'R2-D2');
              
              if (!r2d2) 
                throw new Error('R2-D2 not returned in search results');
            }

Note: You can also place custom JS functions in a module and specify the function name, module path in YAML to import.

More advanced stuff can be done with Just-API. Documentation says it all. Take a look at Just-API Website for detailed documentation.

If you are looking to use Docker to run Just-API, you might want to checkout Just-API docker boilerplate here