open-rpc-mock-server

Provide a Mock server for an OpenRPC Document.

Features

Basic Mode

Given an OpenRPC document, Mock server will provide a mock implementation of the JSON-RPC api that:

• implements all of the methods specified in the given OpenRPC document.
• when calling a method with params used in an example, the example's result will be returned.
• params without examples will have their results generated according to the method.result.schema: JSONSchema.
• validates input params against their respective JSONSchemas.
• Provides rpc.discover for service discovery-based integration testing.

Service Mode

Running the mock server in service mode will run a JSON-RPC service that:

• implements one method: mock. It takes an openrpc document, returns a url path postfix. Appending the path to the services url will give us a mock server for the document provided.
• host it yourself or use the OpenRPC hosted one: https://mock.open-rpc.org

CLI & Javascript/Typescript API

Mock server is generally meant to be run via CLI, however it can also be imported to your project. doing so will:

• give you a function to start the server, and returns you the OpenRPC Server instance
• from there you can add transports, routers & middleware

Install

CLI

1npm i -g @open-rpc/mock-server

Javascript API

1npm i -S @open-rpc/mock-server

Usage

CLI

Defaults

The default settings expect to find a file in the root of your project called open-rpc.json. It will must be a valid OpenRPC document as validated by OpenRPC Metaschema, or an error will be returned.

1npm run mock-server

this will start an HTTP server on http://localhost:3333 (default settings)

Custom path or filename

Where my-open-rpc-document.json is a file in the current directory which is a valid OpenRPC document as validated by OpenRPC Metaschema.

1open-rpc-mock-server -d my-open-rpc-document.json

OpenRPC Document from url

You can also provide a URL that will resolve the OpenRPC document in JSON format:

1open-rpc-mock-server -d https://raw.githubusercontent.com/open-rpc/examples/master/service-descriptions/simple-math-openrpc.json

Running in Service Mode

Allows you to add documents to the running server as a JSON-RPC request. One mock server in service mode can handle a large number of mocked services at once with this configuration.

1open-rpc-mock-server --mode service

A server is running on http://localhost:3333 now. You can call the mock method, and pass it your OpenRPC document, which will start mocking that service (under the returned url path).

Trying out the mocked service

• Try out the free to use OpenRPC-hosted mock server https://mock.open-rpc.org/ here
• use your own localhost mock server with playground here
• or try the postman-like only interface OpenRPC Inspector with any of the above links

Example

• Using OpenRPC Mock Server to test against an Ethereum JSON-RPC API - Jun 11, 2019 - ETC Labs Core

Contributing

How to contribute, build and release are outlined in CONTRIBUTING.md, BUILDING.md and RELEASING.md respectively. Commits in this repository follow the CONVENTIONAL_COMMITS.md specification.