open-consul/command/agent/health_endpoint_test.go

873 lines
20 KiB
Go

package agent
import (
"fmt"
"net/http"
"net/http/httptest"
"os"
"reflect"
"testing"
"github.com/hashicorp/consul/api"
"github.com/hashicorp/consul/consul/structs"
"github.com/hashicorp/consul/testrpc"
"github.com/hashicorp/serf/coordinate"
)
func TestHealthChecksInState(t *testing.T) {
httpTest(t, func(srv *HTTPServer) {
req, err := http.NewRequest("GET", "/v1/health/state/warning?dc=dc1", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
if err := testrpc.WaitForResult(func() (bool, error) {
resp := httptest.NewRecorder()
obj, err := srv.HealthChecksInState(resp, req)
if err != nil {
return false, err
}
if err := checkIndex(resp); err != nil {
return false, err
}
// Should be a non-nil empty list
nodes := obj.(structs.HealthChecks)
if nodes == nil || len(nodes) != 0 {
return false, fmt.Errorf("bad: %v", obj)
}
return true, nil
}); err != nil {
t.Fatal(err)
}
})
httpTest(t, func(srv *HTTPServer) {
req, err := http.NewRequest("GET", "/v1/health/state/passing?dc=dc1", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
if err := testrpc.WaitForResult(func() (bool, error) {
resp := httptest.NewRecorder()
obj, err := srv.HealthChecksInState(resp, req)
if err != nil {
return false, err
}
if err := checkIndex(resp); err != nil {
return false, err
}
// Should be 1 health check for the server
nodes := obj.(structs.HealthChecks)
if len(nodes) != 1 {
return false, fmt.Errorf("bad: %v", obj)
}
return true, nil
}); err != nil {
t.Fatal(err)
}
})
}
func TestHealthChecksInState_NodeMetaFilter(t *testing.T) {
httpTest(t, func(srv *HTTPServer) {
args := &structs.RegisterRequest{
Datacenter: "dc1",
Node: "bar",
Address: "127.0.0.1",
NodeMeta: map[string]string{"somekey": "somevalue"},
Check: &structs.HealthCheck{
Node: "bar",
Name: "node check",
Status: api.HealthCritical,
},
}
var out struct{}
if err := srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
req, err := http.NewRequest("GET", "/v1/health/state/critical?node-meta=somekey:somevalue", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
if err := testrpc.WaitForResult(func() (bool, error) {
resp := httptest.NewRecorder()
obj, err := srv.HealthChecksInState(resp, req)
if err != nil {
return false, err
}
if err := checkIndex(resp); err != nil {
return false, err
}
// Should be 1 health check for the server
nodes := obj.(structs.HealthChecks)
if len(nodes) != 1 {
return false, fmt.Errorf("bad: %v", obj)
}
return true, nil
}); err != nil {
t.Fatal(err)
}
})
}
func TestHealthChecksInState_DistanceSort(t *testing.T) {
dir, srv := makeHTTPServer(t)
defer os.RemoveAll(dir)
defer srv.Shutdown()
defer srv.agent.Shutdown()
testrpc.WaitForLeader(t, srv.agent.RPC, "dc1")
args := &structs.RegisterRequest{
Datacenter: "dc1",
Node: "bar",
Address: "127.0.0.1",
Check: &structs.HealthCheck{
Node: "bar",
Name: "node check",
Status: api.HealthCritical,
},
}
var out struct{}
if err := srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
args.Node, args.Check.Node = "foo", "foo"
if err := srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
req, err := http.NewRequest("GET", "/v1/health/state/critical?dc=dc1&near=foo", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp := httptest.NewRecorder()
obj, err := srv.HealthChecksInState(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
nodes := obj.(structs.HealthChecks)
if len(nodes) != 2 {
t.Fatalf("bad: %v", nodes)
}
if nodes[0].Node != "bar" {
t.Fatalf("bad: %v", nodes)
}
if nodes[1].Node != "foo" {
t.Fatalf("bad: %v", nodes)
}
// Send an update for the node and wait for it to get applied.
arg := structs.CoordinateUpdateRequest{
Datacenter: "dc1",
Node: "foo",
Coord: coordinate.NewCoordinate(coordinate.DefaultConfig()),
}
if err := srv.agent.RPC("Coordinate.Update", &arg, &out); err != nil {
t.Fatalf("err: %v", err)
}
// Retry until foo moves to the front of the line.
if err := testrpc.WaitForResult(func() (bool, error) {
resp = httptest.NewRecorder()
obj, err = srv.HealthChecksInState(resp, req)
if err != nil {
return false, fmt.Errorf("err: %v", err)
}
assertIndex(t, resp)
nodes = obj.(structs.HealthChecks)
if len(nodes) != 2 {
return false, fmt.Errorf("bad: %v", nodes)
}
if nodes[0].Node != "foo" {
return false, fmt.Errorf("bad: %v", nodes)
}
if nodes[1].Node != "bar" {
return false, fmt.Errorf("bad: %v", nodes)
}
return true, nil
}); err != nil {
t.Fatal(err)
}
}
func TestHealthNodeChecks(t *testing.T) {
dir, srv := makeHTTPServer(t)
defer os.RemoveAll(dir)
defer srv.Shutdown()
defer srv.agent.Shutdown()
testrpc.WaitForLeader(t, srv.agent.RPC, "dc1")
req, err := http.NewRequest("GET", "/v1/health/node/nope?dc=dc1", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp := httptest.NewRecorder()
obj, err := srv.HealthNodeChecks(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
// Should be a non-nil empty list
nodes := obj.(structs.HealthChecks)
if nodes == nil || len(nodes) != 0 {
t.Fatalf("bad: %v", obj)
}
req, err = http.NewRequest("GET",
fmt.Sprintf("/v1/health/node/%s?dc=dc1", srv.agent.config.NodeName), nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp = httptest.NewRecorder()
obj, err = srv.HealthNodeChecks(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
// Should be 1 health check for the server
nodes = obj.(structs.HealthChecks)
if len(nodes) != 1 {
t.Fatalf("bad: %v", obj)
}
}
func TestHealthServiceChecks(t *testing.T) {
dir, srv := makeHTTPServer(t)
defer os.RemoveAll(dir)
defer srv.Shutdown()
defer srv.agent.Shutdown()
testrpc.WaitForLeader(t, srv.agent.RPC, "dc1")
req, err := http.NewRequest("GET", "/v1/health/checks/consul?dc=dc1", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp := httptest.NewRecorder()
obj, err := srv.HealthServiceChecks(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
// Should be a non-nil empty list
nodes := obj.(structs.HealthChecks)
if nodes == nil || len(nodes) != 0 {
t.Fatalf("bad: %v", obj)
}
// Create a service check
args := &structs.RegisterRequest{
Datacenter: "dc1",
Node: srv.agent.config.NodeName,
Address: "127.0.0.1",
Check: &structs.HealthCheck{
Node: srv.agent.config.NodeName,
Name: "consul check",
ServiceID: "consul",
},
}
var out struct{}
if err = srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
req, err = http.NewRequest("GET", "/v1/health/checks/consul?dc=dc1", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp = httptest.NewRecorder()
obj, err = srv.HealthServiceChecks(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
// Should be 1 health check for consul
nodes = obj.(structs.HealthChecks)
if len(nodes) != 1 {
t.Fatalf("bad: %v", obj)
}
}
func TestHealthServiceChecks_NodeMetaFilter(t *testing.T) {
dir, srv := makeHTTPServer(t)
defer os.RemoveAll(dir)
defer srv.Shutdown()
defer srv.agent.Shutdown()
testrpc.WaitForLeader(t, srv.agent.RPC, "dc1")
req, err := http.NewRequest("GET", "/v1/health/checks/consul?dc=dc1&node-meta=somekey:somevalue", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp := httptest.NewRecorder()
obj, err := srv.HealthServiceChecks(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
// Should be a non-nil empty list
nodes := obj.(structs.HealthChecks)
if nodes == nil || len(nodes) != 0 {
t.Fatalf("bad: %v", obj)
}
// Create a service check
args := &structs.RegisterRequest{
Datacenter: "dc1",
Node: srv.agent.config.NodeName,
Address: "127.0.0.1",
NodeMeta: map[string]string{"somekey": "somevalue"},
Check: &structs.HealthCheck{
Node: srv.agent.config.NodeName,
Name: "consul check",
ServiceID: "consul",
},
}
var out struct{}
if err = srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
req, err = http.NewRequest("GET", "/v1/health/checks/consul?dc=dc1&node-meta=somekey:somevalue", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp = httptest.NewRecorder()
obj, err = srv.HealthServiceChecks(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
// Should be 1 health check for consul
nodes = obj.(structs.HealthChecks)
if len(nodes) != 1 {
t.Fatalf("bad: %v", obj)
}
}
func TestHealthServiceChecks_DistanceSort(t *testing.T) {
dir, srv := makeHTTPServer(t)
defer os.RemoveAll(dir)
defer srv.Shutdown()
defer srv.agent.Shutdown()
testrpc.WaitForLeader(t, srv.agent.RPC, "dc1")
// Create a service check
args := &structs.RegisterRequest{
Datacenter: "dc1",
Node: "bar",
Address: "127.0.0.1",
Service: &structs.NodeService{
ID: "test",
Service: "test",
},
Check: &structs.HealthCheck{
Node: "bar",
Name: "test check",
ServiceID: "test",
},
}
var out struct{}
if err := srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
args.Node, args.Check.Node = "foo", "foo"
if err := srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
req, err := http.NewRequest("GET", "/v1/health/checks/test?dc=dc1&near=foo", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp := httptest.NewRecorder()
obj, err := srv.HealthServiceChecks(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
nodes := obj.(structs.HealthChecks)
if len(nodes) != 2 {
t.Fatalf("bad: %v", obj)
}
if nodes[0].Node != "bar" {
t.Fatalf("bad: %v", nodes)
}
if nodes[1].Node != "foo" {
t.Fatalf("bad: %v", nodes)
}
// Send an update for the node and wait for it to get applied.
arg := structs.CoordinateUpdateRequest{
Datacenter: "dc1",
Node: "foo",
Coord: coordinate.NewCoordinate(coordinate.DefaultConfig()),
}
if err := srv.agent.RPC("Coordinate.Update", &arg, &out); err != nil {
t.Fatalf("err: %v", err)
}
// Retry until foo has moved to the front of the line.
if err := testrpc.WaitForResult(func() (bool, error) {
resp = httptest.NewRecorder()
obj, err = srv.HealthServiceChecks(resp, req)
if err != nil {
return false, fmt.Errorf("err: %v", err)
}
assertIndex(t, resp)
nodes = obj.(structs.HealthChecks)
if len(nodes) != 2 {
return false, fmt.Errorf("bad: %v", obj)
}
if nodes[0].Node != "foo" {
return false, fmt.Errorf("bad: %v", nodes)
}
if nodes[1].Node != "bar" {
return false, fmt.Errorf("bad: %v", nodes)
}
return true, nil
}); err != nil {
t.Fatal(err)
}
}
func TestHealthServiceNodes(t *testing.T) {
dir, srv := makeHTTPServer(t)
defer os.RemoveAll(dir)
defer srv.Shutdown()
defer srv.agent.Shutdown()
testrpc.WaitForLeader(t, srv.agent.RPC, "dc1")
req, err := http.NewRequest("GET", "/v1/health/service/consul?dc=dc1", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp := httptest.NewRecorder()
obj, err := srv.HealthServiceNodes(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
// Should be 1 health check for consul
nodes := obj.(structs.CheckServiceNodes)
if len(nodes) != 1 {
t.Fatalf("bad: %v", obj)
}
req, err = http.NewRequest("GET", "/v1/health/service/nope?dc=dc1", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp = httptest.NewRecorder()
obj, err = srv.HealthServiceNodes(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
// Should be a non-nil empty list
nodes = obj.(structs.CheckServiceNodes)
if nodes == nil || len(nodes) != 0 {
t.Fatalf("bad: %v", obj)
}
args := &structs.RegisterRequest{
Datacenter: "dc1",
Node: "bar",
Address: "127.0.0.1",
Service: &structs.NodeService{
ID: "test",
Service: "test",
},
}
var out struct{}
if err := srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
req, err = http.NewRequest("GET", "/v1/health/service/test?dc=dc1", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp = httptest.NewRecorder()
obj, err = srv.HealthServiceNodes(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
// Should be a non-nil empty list for checks
nodes = obj.(structs.CheckServiceNodes)
if len(nodes) != 1 || nodes[0].Checks == nil || len(nodes[0].Checks) != 0 {
t.Fatalf("bad: %v", obj)
}
}
func TestHealthServiceNodes_NodeMetaFilter(t *testing.T) {
dir, srv := makeHTTPServer(t)
defer os.RemoveAll(dir)
defer srv.Shutdown()
defer srv.agent.Shutdown()
testrpc.WaitForLeader(t, srv.agent.RPC, "dc1")
req, err := http.NewRequest("GET", "/v1/health/service/consul?dc=dc1&node-meta=somekey:somevalue", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp := httptest.NewRecorder()
obj, err := srv.HealthServiceNodes(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
// Should be a non-nil empty list
nodes := obj.(structs.CheckServiceNodes)
if nodes == nil || len(nodes) != 0 {
t.Fatalf("bad: %v", obj)
}
args := &structs.RegisterRequest{
Datacenter: "dc1",
Node: "bar",
Address: "127.0.0.1",
NodeMeta: map[string]string{"somekey": "somevalue"},
Service: &structs.NodeService{
ID: "test",
Service: "test",
},
}
var out struct{}
if err := srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
req, err = http.NewRequest("GET", "/v1/health/service/test?dc=dc1&node-meta=somekey:somevalue", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp = httptest.NewRecorder()
obj, err = srv.HealthServiceNodes(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
// Should be a non-nil empty list for checks
nodes = obj.(structs.CheckServiceNodes)
if len(nodes) != 1 || nodes[0].Checks == nil || len(nodes[0].Checks) != 0 {
t.Fatalf("bad: %v", obj)
}
}
func TestHealthServiceNodes_DistanceSort(t *testing.T) {
dir, srv := makeHTTPServer(t)
defer os.RemoveAll(dir)
defer srv.Shutdown()
defer srv.agent.Shutdown()
testrpc.WaitForLeader(t, srv.agent.RPC, "dc1")
// Create a service check
args := &structs.RegisterRequest{
Datacenter: "dc1",
Node: "bar",
Address: "127.0.0.1",
Service: &structs.NodeService{
ID: "test",
Service: "test",
},
Check: &structs.HealthCheck{
Node: "bar",
Name: "test check",
ServiceID: "test",
},
}
var out struct{}
if err := srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
args.Node, args.Check.Node = "foo", "foo"
if err := srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
req, err := http.NewRequest("GET", "/v1/health/service/test?dc=dc1&near=foo", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp := httptest.NewRecorder()
obj, err := srv.HealthServiceNodes(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
nodes := obj.(structs.CheckServiceNodes)
if len(nodes) != 2 {
t.Fatalf("bad: %v", obj)
}
if nodes[0].Node.Node != "bar" {
t.Fatalf("bad: %v", nodes)
}
if nodes[1].Node.Node != "foo" {
t.Fatalf("bad: %v", nodes)
}
// Send an update for the node and wait for it to get applied.
arg := structs.CoordinateUpdateRequest{
Datacenter: "dc1",
Node: "foo",
Coord: coordinate.NewCoordinate(coordinate.DefaultConfig()),
}
if err := srv.agent.RPC("Coordinate.Update", &arg, &out); err != nil {
t.Fatalf("err: %v", err)
}
// Retry until foo has moved to the front of the line.
if err := testrpc.WaitForResult(func() (bool, error) {
resp = httptest.NewRecorder()
obj, err = srv.HealthServiceNodes(resp, req)
if err != nil {
return false, fmt.Errorf("err: %v", err)
}
assertIndex(t, resp)
nodes = obj.(structs.CheckServiceNodes)
if len(nodes) != 2 {
return false, fmt.Errorf("bad: %v", obj)
}
if nodes[0].Node.Node != "foo" {
return false, fmt.Errorf("bad: %v", nodes)
}
if nodes[1].Node.Node != "bar" {
return false, fmt.Errorf("bad: %v", nodes)
}
return true, nil
}); err != nil {
t.Fatal(err)
}
}
func TestHealthServiceNodes_PassingFilter(t *testing.T) {
dir, srv := makeHTTPServer(t)
defer os.RemoveAll(dir)
defer srv.Shutdown()
defer srv.agent.Shutdown()
testrpc.WaitForLeader(t, srv.agent.RPC, "dc1")
// Create a failing service check
args := &structs.RegisterRequest{
Datacenter: "dc1",
Node: srv.agent.config.NodeName,
Address: "127.0.0.1",
Check: &structs.HealthCheck{
Node: srv.agent.config.NodeName,
Name: "consul check",
ServiceID: "consul",
Status: api.HealthCritical,
},
}
var out struct{}
if err := srv.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
req, err := http.NewRequest("GET", "/v1/health/service/consul?passing", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp := httptest.NewRecorder()
obj, err := srv.HealthServiceNodes(resp, req)
if err != nil {
t.Fatalf("err: %v", err)
}
assertIndex(t, resp)
// Should be 0 health check for consul
nodes := obj.(structs.CheckServiceNodes)
if len(nodes) != 0 {
t.Fatalf("bad: %v", obj)
}
}
func TestHealthServiceNodes_WanTranslation(t *testing.T) {
dir1, srv1 := makeHTTPServerWithConfig(t,
func(c *Config) {
c.Datacenter = "dc1"
c.TranslateWanAddrs = true
})
defer os.RemoveAll(dir1)
defer srv1.Shutdown()
defer srv1.agent.Shutdown()
testrpc.WaitForLeader(t, srv1.agent.RPC, "dc1")
dir2, srv2 := makeHTTPServerWithConfig(t,
func(c *Config) {
c.Datacenter = "dc2"
c.TranslateWanAddrs = true
})
defer os.RemoveAll(dir2)
defer srv2.Shutdown()
defer srv2.agent.Shutdown()
testrpc.WaitForLeader(t, srv2.agent.RPC, "dc2")
// Wait for the WAN join.
addr := fmt.Sprintf("127.0.0.1:%d",
srv1.agent.config.Ports.SerfWan)
if _, err := srv2.agent.JoinWAN([]string{addr}); err != nil {
t.Fatalf("err: %v", err)
}
if err := testrpc.WaitForResult(func() (bool, error) {
return len(srv1.agent.WANMembers()) > 1, nil
}); err != nil {
t.Fatal(err)
}
// Register a node with DC2.
{
args := &structs.RegisterRequest{
Datacenter: "dc2",
Node: "foo",
Address: "127.0.0.1",
TaggedAddresses: map[string]string{
"wan": "127.0.0.2",
},
Service: &structs.NodeService{
Service: "http_wan_translation_test",
},
}
var out struct{}
if err := srv2.agent.RPC("Catalog.Register", args, &out); err != nil {
t.Fatalf("err: %v", err)
}
}
// Query for a service in DC2 from DC1.
req, err := http.NewRequest("GET", "/v1/health/service/http_wan_translation_test?dc=dc2", nil)
if err != nil {
t.Fatalf("err: %v", err)
}
resp1 := httptest.NewRecorder()
obj1, err1 := srv1.HealthServiceNodes(resp1, req)
if err1 != nil {
t.Fatalf("err: %v", err1)
}
assertIndex(t, resp1)
// Expect that DC1 gives us a WAN address (since the node is in DC2).
nodes1 := obj1.(structs.CheckServiceNodes)
if len(nodes1) != 1 {
t.Fatalf("bad: %v", obj1)
}
node1 := nodes1[0].Node
if node1.Address != "127.0.0.2" {
t.Fatalf("bad: %v", node1)
}
// Query DC2 from DC2.
resp2 := httptest.NewRecorder()
obj2, err2 := srv2.HealthServiceNodes(resp2, req)
if err2 != nil {
t.Fatalf("err: %v", err2)
}
assertIndex(t, resp2)
// Expect that DC2 gives us a private address (since the node is in DC2).
nodes2 := obj2.(structs.CheckServiceNodes)
if len(nodes2) != 1 {
t.Fatalf("bad: %v", obj2)
}
node2 := nodes2[0].Node
if node2.Address != "127.0.0.1" {
t.Fatalf("bad: %v", node2)
}
}
func TestFilterNonPassing(t *testing.T) {
nodes := structs.CheckServiceNodes{
structs.CheckServiceNode{
Checks: structs.HealthChecks{
&structs.HealthCheck{
Status: api.HealthCritical,
},
&structs.HealthCheck{
Status: api.HealthCritical,
},
},
},
structs.CheckServiceNode{
Checks: structs.HealthChecks{
&structs.HealthCheck{
Status: api.HealthCritical,
},
&structs.HealthCheck{
Status: api.HealthCritical,
},
},
},
structs.CheckServiceNode{
Checks: structs.HealthChecks{
&structs.HealthCheck{
Status: api.HealthPassing,
},
},
},
}
out := filterNonPassing(nodes)
if len(out) != 1 && reflect.DeepEqual(out[0], nodes[2]) {
t.Fatalf("bad: %v", out)
}
}