setup / teardown pattern in Go tests

harness_style_test.go

package main_test

import (
	"net/http/httptest"
	"testing"
)

type testHarness struct {
	server *httptest.Server
}

func setup() *testHarness {
	return &testHarness{server: httptest.NewServer(handler)}
}

func (t *testHarness) teardown() {
	t.server.Close()
}

func TestSomething(t *testing.T) {
	h := setup()
	defer h.teardown()

	t.Log(h.server.URL)
}

func TestSomethingElse(t *testing.T) {
	h := setup()
	defer h.teardown()

	t.Log(h.server.URL)
}

my_test.go

package main_test

import (
	"net/http/httptest"
	"testing"
)

var (
	server *httptest.Server
)

func setup() {
	// should actually be my http handler that I am testing
	server = httptest.NewServer(nil)
}

func teardown() {
	server.Close()
}

func TestSomething(t *testing.T) {
	setup()
	defer teardown()

	t.Log(server.URL)
}

func TestSomethingElse(t *testing.T) {
	setup()
	defer teardown()

	t.Log(server.URL)
}