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Core binaries for pact-js, a Contract Testing Framework. NOTE: If you are looking to do Pact contract testing in node, you almost certainly want pact-js, not pact-node.

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ℹ️ Usage notice
This is a core library, designed for use in the bowels of another package. Unless you are wanting to develop tools for the pact ecosystem, you almost certainly want to install @pact-foundation/pact instead

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Pact-JS Core

A wrapper for the Pact Reference Core Library.

Installation

npm install @pact-foundation/pact-core --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?

TL;DR - you almost always want Pact JS.

Purpose Library Comments
Synchronous / HTTP APIs Pact JS
Asynchronous APIs Pact JS
Node.js Pact JS
Browser testing Pact Web You probably still want Pact JS. See Using Pact in non-Node environments *
Isomorphic testing Pact Web You probably still want Pact JS. See Using Pact in non-Node environments *
Publishing to Pact Broker Pact CLI

* The "I need to run it in the browser" question comes up occasionally. The question is this - for your JS code to be able to make a call to another API, is this dependent on browser-specific code? In most cases, people use tools like React/Angular which have libraries that work on the server and client side, in which case, these tests don't need to run in a browser and could instead be executed in a Node.js environment.

Documentation

Set Log Level

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

Provider Verification

Read more about Verify Pacts.

var pact = require('@pact-foundation/pact-core');

pact.verifyPacts({
 ...
});

Options:

Parameter Required? Type Description
providerBaseUrl true string Running API provider host endpoint.
pactBrokerUrl false string Base URL of the Pact Broker from which to retrieve the pacts. Required if pactUrls not given.
provider false string Name of the provider if fetching from a Broker
consumerVersionSelectors false ConsumerVersionSelector|array Use Selectors to is a way we specify which pacticipants and versions we want to use when configuring verifications.
consumerVersionTags false string|array Retrieve the latest pacts with given tag(s)
providerVersionTags false string|array Tag(s) to apply to the provider application
includeWipPactsSince false string Includes pact marked as WIP since this date. String in the format %Y-%m-%d or %Y-%m-%dT%H:%M:%S.000%:z
pactUrls false array Array of local pact file paths or HTTP-based URLs. Required if not using a Pact Broker.
providerStatesSetupUrl false string URL to send PUT requests to setup a given provider state
pactBrokerUsername false string Username for Pact Broker basic authentication
pactBrokerPassword false string Password for Pact Broker basic authentication
pactBrokerToken false string Bearer token for Pact Broker authentication
publishVerificationResult false boolean Publish verification result to Broker (NOTE: you should only enable this during CI builds)
providerVersion false string Provider version, required to publish verification result to Broker. Optional otherwise.
enablePending false boolean Enable the pending pacts feature.
timeout false number The duration in ms we should wait to confirm verification process was successful. Defaults to 30000.
logLevel false LogLevel (string) Log level. One of "TRACE", "DEBUG", "ERROR", "WARN", "INFO", can be set by LOG_LEVEL env var

The consumer version selector looks like this:

ConsumerVersionSelector {
  tag?: string;
  latest?: boolean;
  consumer?: string;
  deployedOrReleased?: boolean;
  deployed?: boolean; 
  released?: boolean; 
  environment?: string;
  fallbackTag?: string;
  branch?: string;
  mainBranch?: boolean;
  matchingBranch?: boolean;
}

See the Pact Broker documentation on selectors for more information.

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.

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Core binaries for pact-js, a Contract Testing Framework. NOTE: If you are looking to do Pact contract testing in node, you almost certainly want pact-js, not pact-node.

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