History

Frank Schroeder 74859ff3c0 test: replace porter tool with freeport lib This patch removes the porter tool which hands out free ports from a given range with a library which does the same thing. The challenge for acquiring free ports in concurrent go test runs is that go packages are tested concurrently and run in separate processes. There has to be some inter-process synchronization in preventing processes allocating the same ports. freeport allocates blocks of ports from a range expected to be not in heavy use and implements a system-wide mutex by binding to the first port of that block for the lifetime of the application. Ports are then provided sequentially from that block and are tested on localhost before being returned as available.		2017-10-21 22:01:09 +02:00
..
retry
io.go
README.md
server.go
server_methods.go
server_wrapper.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 TestFoo_bar(t *testing.T) {
	// Create a test Consul server
	srv1, err := testutil.NewTestServer()
	if err != nil {
		t.Fatal(err)
	}
	defer srv1.Stop()

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

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

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

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

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

	// Create a service that will be accessed in target source code
	srv1.AddAccessibleService("redis", structs.HealthPassing, "127.0.0.1", 6379, []string{"master"})

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

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

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

	// All functions also have a wrapper method to limit the passing of "t"
	wrap := srv1.Wrap(t)
	wrap.SetKV("foo", []byte("bar"))
}