npm i pact

// Pact works with http.Server instances.
// This includes express.Server, connect.Server, etc.
// This method returns a new express.Server:
var createServer = require("../lib/app").createServer;

require("vows").describe("HTTP Server").addBatch({
    "A server in development" : {
        // Start a server for testing with httpify
        // Give it a new http.Server
        topic : httpify(createServer()),
        "when /foo is requested" : {
            topic : request(), // knows the URL from context name
            "should fail" : code(400) // check status code
        }
        "when /foo?bar=baz is requested" : {
            topic : request(),
            "should succeed" : code(200),
            "should return response time header" : function (topic) {
                // header names are lowercased for easy testing
                assert.include(topic.headers, "x-response-time");
            },
            "should be correct size" : function (topic) {
                // response is available as topic.body
                assert.equal(topic.body.length, 11);
            }
        },
        "when making a bogus request" : {
            // you can always specify your own URL
            // POST requests work as well
            topic : request({
                url : "/bogus",
                method : "POST",
                body : "quux=0"
            }),
            "should fail" : code(404)
        }
    },
    "A server in production" : {
        topic : function () {
            // Example: wrap httpify for testing
            // with a new environment
            var oldEnv = process.env.NODE_ENV;
            process.env.NODE_ENV = "production";
            var server = app.createServer();
            httpify(server).apply(this);
            process.env.NODE_ENV = oldEnv;
        },
        "when / is requested" : {
            topic : request(),
            "should fail" : code(404)
        }
    }
}).export(module);

make test