Pact Mock Service

This codebase provides the HTTP mock service used by implementations of Pact. It is packaged as a gem, and as a standalone executable for Mac OSX and Linux and Windows.

The mock service provides the following endpoints:

• DELETE /interactions - clear previously mocked interactions
• POST /interactions - set up an expected interaction
• PUT /interactions - clear and set up multiple expected interactions in one call
• GET /interactions/verification - determine whether the expected interactions have taken place
• POST /pact - write the pact file
• GET / - the healthcheck endpoint

All requests to the "administration" endpoints listed above must contain the header X-Pact-Mock-Service: true to allow the mock service to know whether the request is an administration request or a request from the actual consumer code.

As the Pact mock service can be used as a standalone executable and administered via HTTP, it can be used for testing with any language. All that is required is a library in the native language to create the HTTP calls listed above. Check out docs.pact.io for a list of implemented languages. If you are interested in creating bindings in a new langauge, and have a chat to one of us on the pact-dev Google group.

Installation

Without Ruby

Use the Pact standalone executables.

With Ruby

Use the pact gem if you would like the full Pact DSL, mock service and verification functionality in your ruby project.

Otherwise:

$ gem install pact-mock_service
$ pact-mock-service --consumer Foo --provider Bar --port 1234

Or add gem "pact-mock_service" to your Gemfile then run:

$ bundle install
$ bundle exec pact-mock-service --consumer Foo --provider Bar --port 1234

Run pact-mock-service help for command line options.

Usage

The lifecycle of the a mock service instance during at test suite is as follows:

Before suite: start mock service Before each test: clear interactions from previous test During test: set up interactions, execute interactions After each test: verify interactions After suite: write pact file, stop mock service

Each mock service instance can only handle one test process/thread at a time. If you wish to run multiple test threads in parallel, you will need to start each mock service instance on a different port, and set the --pact-file-write-mode to merge (see usage notes below).

Usage:
  pact-mock-service service

Options:
      [--consumer=CONSUMER]                                      # Consumer name
      [--provider=PROVIDER]                                      # Provider name
  -p, [--port=PORT]                                              # Port on which to run the service
  -h, [--host=HOST]                                              # Host on which to bind the service
                                                                 # Default: localhost
  -d, [--pact-dir=PACT_DIR]                                      # Directory to which the pacts will be written
  -m, [--pact-file-write-mode=PACT_FILE_WRITE_MODE]              # `overwrite` or `merge`. Use `merge` when running multiple mock service instances in parallel for the same consumer/provider pair. Ensure the pact file is deleted before running tests when using this option so that interactions deleted from the code are not maintained in the file.
                                                                 # Default: overwrite
  -i, [--pact-specification-version=PACT_SPECIFICATION_VERSION]  # The pact specification version to use when writing the pact
                                                                 # Default: 1
  -l, [--log=LOG]                                                # File to which to log output
  -o, [--cors=CORS]                                              # Support browser security in tests by responding to OPTIONS requests and adding CORS headers to mocked responses
      [--ssl], [--no-ssl]                                        # Use a self-signed SSL cert to run the service over HTTPS
      [--sslcert=SSLCERT]                                        # Specify the path to the SSL cert to use when running the service over HTTPS
      [--sslkey=SSLKEY]                                          # Specify the path to the SSL key to use when running the service over HTTPS

Start a mock service. If the consumer, provider and pact-dir options are provided, the pact will be written automatically on shutdown.

See script/example.sh for an executable example.

You can find more documentation for the mock service in the repository wiki.

With SSL

If you need to use the mock service with HTTPS, you can use the built-in SSL mode which relies on and generates a self-signed certificate.

$ pact-mock-service --port 1234 --ssl

If you need to provide your own certificate and key, use the following syntax.

$ pact-mock-service --port 1234 --ssl --sslcert PATH_TO_CERT --sslkey PATH_TO_KEY

With CORS

Read the wiki page on CORS.

Contributing

See CONTRIBUTING.md