github.com/smeshkov/go-mock-server

Go Mock

Light weight mock server written in Go.

Supported features:

• good old mocked JSON responses for HTTP methods and URI paths;
• custom error behaviours;
• proxying;
• dynamic results, as in store data from an incoming JSON and then retrieve it.

Installation

For MacOS:

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/smeshkov/gomock/master/_bin/install.sh)"

For Linux:

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/smeshkov/gomock/master/_bin/install.sh)" linux

For Windows:

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/smeshkov/gomock/master/_bin/install.sh)" windows

Usage

Create JSON file with your mocks and start mock server by running gomock -mock /path/to/your/mock.json.

mock.json defines mocks - handlers which will serve provided mocks.

Use gomock --help for more information.

mock.json example:

{
  "port": 8080,
  "endpoints": [
    {
      "methods": [ "GET" ],
      "status": 200,
      "path": "/users",
      "jsonPath": "./users.json"
    },
    {
      "path": "/user/1",
      "json": {
        "id": 1,
        "name": "name",
        "address": "address"
      },
      "allowCors": [ "example.com" ]
    },
    {
      "methods": ["POST"],
      "path": "/error",
      "delay": 100,
      "status": 400,
      "json": {
        "message": "failed"
      }
    },
    {
      "methods": [ "POST" ],
      "path": "/api/*",
      "delay": 200,
      "url": "http://localhost:8090"
    }
  ]
}

Mock JSON configuration properties:

• port - optional (defaults to 8080);
• endpoints - an array of endpoints to configure;

Endpoint object in endpoints list:

• methods - list of allowed methods, optional defaults to "GET";
• path - URL path to the mocked endpoint, if not set, then defaults to catch all;
• delay - delay in milliseconds on the server side;
• status - HTTP response status code, optional defaults to 200;
• json - one way of defining response payload, will output given JSON;
• jsonPath - another way of defining response payload, will read file from the given path (can be relative to the root mock JSON file) and write its contents to response;
• proxy - proxies requests to the given address;
• static - serves static files;
• errors - helps to setup sampled errors, with the randomised error codes;
• allowCors - list of allowed domains for CORS;
• dynamic - allows to configure dynamic read/write behaviour, i.e. values can be stored and retrieved from the inetrnal store.

mock.json is the default name for a mock configuration file, it can be renamed and set via -mock option, e.g. ./gomock -mock api.json

Dynamic mocking

You can store and retrieve values in your mocks by using dynamic property.

For writes use dynamic.write.json:

{
  "port": 8080,
  "endpoints": [
    {
      "methods": [ "POST" ],
      "path": "/note",
      "dynamic": {
        "write": {
          "json": {
            "name": "note",
            "key": "/id", // path to an entity's key inside the incoming request JSON from the client ("id" field in this case)
            "value": "." // path to an entity's value inside the incoming request JSON from the client (root in this case)
          }
        }
      }
    }
  ]
}

For reads use dynamic.read.json:

{
  "port": 8080,
  "endpoints": [
    {
      "methods": [ "GET" ],
      "path": "/note/{noteID:[a-zA-Z0-9-]+}", // uses Gorilla Mux paths
      "dynamic": {
        "read": {
          "json": {
            "name": "note",
            "keyParam": "noteID", // path to an entity's key inside the incoming request path from the client ("noteID" param in this case)
          }
        }
      }
    }
  ]
}

Changelog

See CHANGELOG.md

Contributing

See CONTRIBUTING.md

License

Released under the Apache License 2.0.