Enables consumer driven contract testing, providing a mock service and DSL for the consumer project, and interaction playback and verification for the service provider project.

Pact is most valuable for designing and testing integrations where you (or your team/organisation/partner organisation) control the development of both the consumer and the provider, and the requirements of the consumer are going to be used to drive the features of the provider. It is fantastic tool for developing and testing intra-organisation microservices. A service is mocked using an actual process running on a specified port, so javascript clients can be tested as easily as backend clients. "Provider states" (similar to fixtures) allow the same request to be made with a different expected response. Consumers specify only the fields they are interested in, allowing a provider to return more fields without breaking the pact. This allows a provider to have a different pact with a different consumer, and know which fields each cares about in a given response. RSpec and Minitest support for the service consumer codebase. Rake tasks allow pacts to be verified against a service provider codebase. Different versions of a consumer/provider pairs can be easily tested against each other, allowing confidence when deploying new versions of each (see the pact_broker and pact_broker-client gems). Autogenerated API documentation - need we say more? Autogenerated network diagrams with the Pact Broker 

Development tool to mock API endpoints quickly and easily (docker image available)

DuckRails is a development tool. Its main purpose is to allow developers to quickly mock API endpoints that for many possible reasons they can't reach at a specific time. Embedded Ruby JavaScript 

Mocha is a mocking and stubbing library for Ruby

RSpec's 'test double' framework, with support for stubbing and mocking

rspec-mocks is a test-double framework for rspec with support for method stubs, fakes, and message expectations on generated test-doubles and real objects alike. 

A mocking library for testing stripe ruby

This gem has unexpectedly grown in popularity and I've gotten pretty busy, so I'm currently looking for more core contributors to help me out. If you're interested, there is only one requirement: submit a significant enough pull request and have it merged into master (many of you have already done this). Afterwards, ping @gilbert in chat and I will add you as a collaborator. No stripe server access required Easily test against stripe errors Mock and customize stripe webhooks Flip a switch to run your tests against Stripe's live test servers 

Generate mocks from ActiveRecord models for unit tests that run fast because they don’t need to load Rails or a database.

Creates stub classes from any ActiveRecord model. By using stubs in your tests you don't need to load Rails or the database, sometimes resulting in a 10x speed improvement. ActiveMocker analyzes the methods and database columns to generate a Ruby class file. The stub file can be run standalone and comes included with many useful parts of ActiveRecord. Stubbed out methods contain their original argument signatures or ActiveMocker's friendly code can be brought over in its entirety. Mocks are regenerated when the schema is modified so your mocks won't go stale, preventing the case where your unit tests pass but production code fails. Use theses defaults if you are starting fresh. 

Mock Redis gem for RubyString methods: get, set, append, incr, etc. List methods: lpush, lpop, lrange, rpoplpush, etc. Set methods: sadd, sinter, sismember, srandmember, etc. Hash methods: hset, hget, hgetall, hmget, hincrby, hincrbyfloat etc. Sorted set methods: zadd, zrank, zunionstore, etc. Expirations: expire, pexpire, ttl, pttl, etc. Transactions: multi, exec, discard Futures 

Mock5 allows to mock external APIs with simple Sinatra Rack apps. 

A simple opinionated mocking framework. All the features of rspec-mocks and more in half the code.

Spy is a lightweight stubbing framework with support for method spies, constant stubs, and object mocks. Spy supports ruby 2.1.0+. For versions less than 2.1 use v0.4.5. Spy features that were completed were tested against the rspec-mocks tests so it covers all cases that rspec-mocks does. Inspired by the spy api of the jasmine javascript testing framework. 