History

Seth Vargo a3cd42bd68 Use a random port instead of idx in testutil The testutil server uses an atomic incrementer to generate unique port numbers. This works great until tests are run in parallel, _across packages_. Because each package starts at the same "offset" idx, they collide. One way to overcome this is to run each packages' test in isolation, but that makes the test suite much longer as it does not maximize parallelization. Alternatively, instead of having "predictable" ports, we can let the OS choose a random open port automatically. This still has a (albeit smaller) race condition in that the OS could return an open port twice, before the server has a chance to actually start and occupy said port. In practice, I have not been able to hit this race condition, so it either doesn't happen or it happens far less frequently that the existing implementation. I'm not sure how I feel about the panic, but this is just test code, so I'm including to say it's okay?		2016-12-01 17:24:26 +02:00
..
README.md	…
server.go	Use a random port instead of idx in testutil	2016-12-01 17:24:26 +02:00
wait.go	…
wait_test.go	…

README.md

Consul Testing Utilities

This package provides some generic helpers to facilitate testing in Consul.

TestServer

TestServer is a harness for managing Consul agents and initializing them with test data. Using it, you can form test clusters, create services, add health checks, manipulate the K/V store, etc. This test harness is completely decoupled from Consul's core and API client, meaning it can be easily imported and used in external unit tests for various applications. It works by invoking the Consul CLI, which means it is a requirement to have Consul installed in the $PATH.

Following is an example usage:

package my_program

import (
	"testing"

	"github.com/hashicorp/consul/consul/structs"
	"github.com/hashicorp/consul/testutil"
)

func TestMain(t *testing.T) {
	// Create a test Consul server
	srv1 := testutil.NewTestServer(t)
	defer srv1.Stop()

	// Create a secondary server, passing in configuration
	// to avoid bootstrapping as we are forming a cluster.
	srv2 := testutil.NewTestServerConfig(t, func(c *testutil.TestServerConfig) {
		c.Bootstrap = false
	})
	defer srv2.Stop()

	// Join the servers together
	srv1.JoinLAN(srv2.LANAddr)

	// Create a test key/value pair
	srv1.SetKV("foo", []byte("bar"))

	// Create lots of test key/value pairs
	srv1.PopulateKV(map[string][]byte{
		"bar": []byte("123"),
		"baz": []byte("456"),
	})

	// Create a service
	srv1.AddService("redis", structs.HealthPassing, []string{"master"})

	// Create a service check
	srv1.AddCheck("service:redis", "redis", structs.HealthPassing)

	// Create a node check
	srv1.AddCheck("mem", "", structs.HealthCritical)

	// The HTTPAddr field contains the address of the Consul
	// API on the new test server instance.
	println(srv1.HTTPAddr)
}