Pact CLI

• Pact CLI
  • Pact CLI Tools
  • Pact-CLI API
  • Installation
  • Do Not Track
  • Which Library/Package should I use?
  • Usage
  • Documentation
  • Set Log Level
  • Pact Broker Publishing
  • Pact Broker Deployment Check
  • Mock Servers
    • Create Mock Server
    • List Mock Servers
    • Remove All Mock Servers
    • Start a Mock Server
    • Stop a Mock server
    • Delete a Mock server
    • Check if a Mock server is running
    • Mock Server Events
  • Stub Servers
    • Create Stub Server
  • Message Pacts
    • Create Message Pacts
    • Example
  • Windows Issues
  • Enable Long Paths
  • Contributing
  • Testing
  • Questions?

Pact CLI Tools

This package wraps the Pact Standalone Tools so that they are available to node scripts in package.json, and linked binaries in the standard NPM installation directory (e..g. ./node_modules/.bin).

For example:

"scripts": {
  "pactPublish": "pact-broker publish ./pacts --consumer-app-version=$\(git describe\) --broker-base-url=$BROKER_BASE_URL --broker-username=$BROKER_USERNAME --broker-password=BROKER_PASSWORD"`
}

Or:

```sh
# Example can-i-deploy check
./node_modules/.bin/pact-broker can-i-deploy --pacticipant "Banana Service" --broker-base-url https://test.pact.dius.com.au --latest --broker-username dXfltyFMgNOFZAxr8io9wJ37iUpY42M --broker-password O5AIZWxelWbLvqMd8PkAVycBJh2Psyg1

Computer says no ¯\_(ツ)_/¯

CONSUMER       | C.VERSION | PROVIDER       | P.VERSION | SUCCESS?
---------------|-----------|----------------|-----------|---------
Banana Service | 1.0.0     | Fofana Service | 1.0.0     | false

The verification between the latest version of Banana Service (1.0.0) and version 1.0.0 of Fofana Service failed

The following are the binaries currently made available:

• pact-mock-service
• pact-broker
• pact-stub-service
• pact-message
• pact-provider-verifier
• pact

Pact-CLI API

A wrapper for the Pact CLI Tools.

Installation

npm install @pact-foundation/pact-cli --save-dev

Do Not Track

In order to get better statistics as to who is using Pact, we have an anonymous tracking event that triggers when Pact installs for the first time. To respect your privacy, anyone can turn it off by simply adding a 'do not track' flag within their package.json file:

{
 "name": "some-project",
 ...
 "config": {
  "pact_do_not_track": true
 },
 ...
}

Which Library/Package should I use?

pact-js for core contract testing functionality pact-cli for broker client tools, either standalone or as a JavaScript API.

Usage

Simply require the library and call the create function to start the mock service

var pact = require("@pact-foundation/pact-cli");
var server = pact.createServer({ port: 9999 });
server.start().then(function() {
 // Do your testing/development here
});

Or if you're using Typescript instead of plain old Javascript

import pact from "@pact-foundation/pact-cli";
const server = pact.createServer({ port: 9999 });
server.start().then(() => {
 // Do your testing/development here
});

Or you can also use the CLI

$# pact mock --port 9999

To see the list commands possible with the CLI, simply ask for help $# pact --help

Documentation

Set Log Level

var pact = require("@pact-foundation/pact-cli");
pact.logLevel("debug");

or you can set it via an environment variable

LOG_LEVEL=debug

Pact Broker Publishing

var pact = require('@pact-foundation/pact-core');
var opts = {
 ...
};

pact.publishPacts(opts).then(function () {
 // do something
});

Options:

Parameter	Required?	Type	Description
pactFilesOrDirs	true	array	Array of local Pact files or directories containing them. Required.
pactBroker	true	string	URL of the Pact Broker to publish pacts to. Required.
consumerVersion	true	string	A string containing a semver-style version e.g. 1.0.0. Required.
pactBrokerUsername	false	string	Username for Pact Broker basic authentication. Optional
pactBrokerPassword	false	string	Password for Pact Broker basic authentication. Optional
pactBrokerToken	false	string	Bearer token for Pact Broker authentication. Optional
tags	false	array	An array of Strings to tag the Pacts being published. Optional
branch	false	string	The branch to associate with the published pacts. Optional but recommended
autoDetectVersionProperties	false	boolean	Automatically detect the repository branch from known CI environment variables or git CLI. Supports Buildkite, Circle CI, Travis CI, GitHub Actions, Jenkins, Hudson, AppVeyor, GitLab, CodeShip, Bitbucket and Azure DevOps. Optional
buildUrl	false	string	The build URL that created the pact. Optional
verbose	false	boolean	Enables verbose output for underlying pact binary.

Pact Broker Deployment Check

var pact = require('@pact-foundation/pact-core');
var opts = {
 ...
};

pact.canDeploy(opts)
 .then(function (result) {
  // You can deploy this
    // If output is not specified or is json, result describes the result of the check.
    // If outout is 'table', it is the human readable string returned by the check
 })
 .catch(function(error) {
  // You can't deploy this
    // if output is not specified, or is json, error will be an object describing
    // the result of the check (if the check failed),
    // if output is 'table', then the error will be a string describing the output from the binary,

    // In both cases, `error` will be an Error object if something went wrong during the check.
 });

Options:

Parameter	Required?	Type	Description
pacticipants	true	[]objects	An array of version selectors in the form { name: String, latest?: string | boolean, version?: string }
			specify a tag, use the tagname with latest. Specify one of these per pacticipant
			that you want to deploy
pactBroker	true	string	URL of the Pact Broker to query about deployment. Required.
pactBrokerUsername	false	string	Username for Pact Broker basic authentication. Optional
pactBrokerPassword	false	string	Password for Pact Broker basic authentication. Optional
pactBrokerToken	false	string	Bearer token for Pact Broker authentication. Optional
output	false	json,table	Specify output to show, json or table. Optional, Defaults to json.
verbose	false	boolean	Enables verbose output for underlying pact binary.
retryWhileUnknown	false	number	The number of times to retry while there is an unknown verification result. Optional
retryInterval	false	number	The time between retries in seconds, use with retryWhileUnknown. Optional
to	false	string	The tag that you want to deploy to (eg, 'prod')

Mock Servers

Mock servers are used by Pact to record interactions and create pact contracts.

Create Mock Server

var pact = require('@pact-foundation/pact-cli');
var server = pact.createServer({
 ...
});

Options:

Parameter	Required?	Type	Description
port	false	number	Port number that the server runs on, defaults to random available port
host	false	string	Host on which to bind the server on, defaults to 'localhost'. Supports '0.0.0.0' to bind on all IPv4 addresses on the local machine.
log	false	string	File to log output on relative to current working directory, defaults to none
logLevel	false	LogLevel (string)	Log level to pass to the pact core. One of "DEBUG", "ERROR", "WARN", "INFO", can be set by LOG_LEVEL env var
ssl	false	boolean	Create a self-signed SSL cert to run the server over HTTPS , defaults to false
sslcert	false	string	Path to a custom self-signed SSL cert file, 'ssl' option must be set to true to use this option, defaults to none
sslkey	false	string	Path a custom key and self-signed SSL cert key file, 'ssl' option must be set to true to use this, defaults to none
cors	false	boolean	Allow CORS OPTION requests to be accepted, defaults to 'false'
dir	false	string	Directory to write the pact contracts relative to the current working directory, defaults to none
spec	false	number	The pact specification version to use when writing pact contracts, defaults to '1'
consumer	false	string	The name of the consumer to be written to the pact contracts, defaults to none
provider	false	string	The name of the provider to be written to the pact contracts, defaults to none
pactFileWriteMode	false	overwrite OR update OR merge	Control how the pact file is created. Defaults to "overwrite"
format	false	json OR xml	Format to write the results as, either in JSON or XML, defaults to JSON
out	false	string	Write output to a file instead of returning it in the promise, defaults to none
timeout	false	number	How long to wait for the mock server to start up (in milliseconds). Defaults to 30000 (30 seconds)

List Mock Servers

If you ever need to see which servers are currently created.

var pact = require("@pact-foundation/pact-cli");
var servers = pact.listServers();
console.log(JSON.stringify(servers));

Remove All Mock Servers

Remove all servers once you're done with them in one fell swoop.

var pact = require("@pact-foundation/pact-cli");
pact.removeAllServers();

Start a Mock Server

Start the current server.

var pact = require("@pact-foundation/pact-cli");
pact.createServer()
 .start()
 .then(function() {
  // Do something after it started
 });

Stop a Mock server

Stop the current server.

var pact = require("@pact-foundation/pact-cli");
pact.createServer()
 .stop()
 .then(function() {
  // Do something after it stopped
 });

Delete a Mock server

Stop the current server and deletes it from the list.

var pact = require("@pact-foundation/pact-cli");
pact.createServer()
 .delete()
 .then(function() {
  // Do something after it was killed
 });

Check if a Mock server is running

var pact = require("@pact-foundation/pact-cli");
pact.createServer().running;

Mock Server Events

There's 3 different events available, 'start', 'stop' and 'delete'. They can be listened to the same way as an EventEmitter.

var pact = require("@pact-foundation/pact-cli");
var server = pact.createServer();
server.on("start", function() {
 console.log("started");
});
server.on("stop", function() {
 console.log("stopped");
});
server.on("delete", function() {
 console.log("deleted");
});

Stub Servers

Stub servers create runnable APIs from existing pact files.

The interface is comparable to the Mock Server API.

Create Stub Server

var pact = require('@pact-foundation/pact-cli');
var server = pact.createStub({
 ...
});

Options:

Parameter	Required?	Type	Description
pactUrls	true	array	List of local Pact files to create the stub service from
port	false	number	Port number that the server runs on, defaults to random available port
host	false	string	Host on which to bind the server on, defaults to 'localhost'. Supports '0.0.0.0' to bind on all IPv4 addresses on the local machine.
log	false	string	File to log output on relative to current working directory, defaults to none
logLevel	false	LogLevel (string)	Log level to pass to the pact core. One of "DEBUG", "ERROR", "WARN", "INFO", can be set by LOG_LEVEL env var
ssl	false	boolean	Create a self-signed SSL cert to run the server over HTTPS , defaults to 'false'
sslcert	false	string	Path to a custom self-signed SSL cert file, 'ssl' option must be set to true to use this option. Defaults false	to none
sslkey	false	string	Path a custom key and self-signed SSL cert key file, 'ssl' option must be set to true to use this option false. Defaults to none
cors	false	boolean	Allow CORS OPTION requests to be accepted, defaults to 'false'
timeout	false	number	How long to wait for the stub server to start up (in milliseconds). Defaults to 30000 (30 seconds)

Message Pacts

Create Message Pacts

var pact = require('@pact-foundation/pact-cli');
var message = pact.createMessage({
 ...
});

Options:

Parameter	Required?	Type	Description
dir	true	string	Directory to write the pact contracts relative to the current working directory, defaults to none
consumer	true	string	The name of the consumer to be written to the pact contracts, defaults to none
provider	true	string	The name of the provider to be written to the pact contracts, defaults to none
pactFileWriteMode	false	"overwrite" | "update" | "merge"	Control how the pact file is created. Defaults to "update"

Example

const messageFactory = messageFactory({
 consumer: "consumer",
 provider: "provider",
 dir: dirname(`${__filename}/pacts`),
 content: `{
  "description": "a test mesage",
  "content": {
   "name": "Mary"
  }
 }`
});

messageFactory.createMessage();

Windows Issues

Enable Long Paths

Windows has a default path length limit of 260 causing issues with projects that are nested deep inside several directory and with how npm handles node_modules directory structures. To fix this issue, please enable Windows Long Paths in the registry by running regedit.exe, find the key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem\LongPathsEnabled and change the value from 0 to 1, then reboot your computer. Pact should now work as it should, if not, please raise an issue on github.

Contributing

To develop this project, simply install the dependencies with npm install --ignore-scripts, and run npm run watch to for continual development, linting and testing when a source file changes.

Testing

Running npm test will execute the tests that has the *.spec.js pattern.

Questions?

Please search for potential answers or post question on our official Pact StackOverflow.