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testutils.go
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testutils.go
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package testutils
import (
"crypto/rand"
"crypto/rsa"
"encoding/json"
"fmt"
"log"
"net/http"
"net/http/httptest"
"os"
"strings"
"testing"
"time"
"github.com/go-logr/logr"
"github.com/weaveworks/weave-gitops/pkg/kube"
"github.com/weaveworks/weave-gitops/pkg/vendorfakes/fakelogr"
"gopkg.in/square/go-jose.v2"
"gopkg.in/square/go-jose.v2/jwt"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/envtest"
kustomizev2 "github.com/fluxcd/kustomize-controller/api/v1beta2"
sourcev1 "github.com/fluxcd/source-controller/api/v1beta1"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
v1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
"k8s.io/client-go/discovery"
memory "k8s.io/client-go/discovery/cached"
"k8s.io/client-go/dynamic"
"k8s.io/client-go/rest"
"k8s.io/client-go/restmapper"
)
var k8sEnv *K8sTestEnv
type K8sTestEnv struct {
Client client.Client
DynClient dynamic.Interface
RestMapper *restmapper.DeferredDiscoveryRESTMapper
Rest *rest.Config
Stop func()
}
// Starts a local k8s test environment for testing Kubernetes operations such as Create, Get, Delete, etc.
// Note that crdPaths are relative to the path of the test file,
// NOT the current working directory or path that the tests were started from.
func StartK8sTestEnvironment(crdPaths []string) (*K8sTestEnv, error) {
if k8sEnv != nil {
return k8sEnv, nil
}
testEnv := &envtest.Environment{
CRDDirectoryPaths: crdPaths,
CRDInstallOptions: envtest.CRDInstallOptions{
CleanUpAfterUse: false,
},
}
var err error
cfg, err := testEnv.Start()
if err != nil {
return nil, fmt.Errorf("could not start testEnv: %w", err)
}
scheme := kube.CreateScheme()
k8sManager, err := ctrl.NewManager(cfg, ctrl.Options{
ClientDisableCacheFor: []client.Object{
&corev1.Namespace{},
&corev1.Secret{},
&appsv1.Deployment{},
&corev1.ConfigMap{},
&kustomizev2.Kustomization{},
&sourcev1.GitRepository{},
&v1.CustomResourceDefinition{},
},
Scheme: scheme,
MetricsBindAddress: "0",
})
if err != nil {
return nil, fmt.Errorf("could not create controller manager: %w", err)
}
go func() {
err := k8sManager.Start(ctrl.SetupSignalHandler())
if err != nil {
log.Fatal(err.Error())
}
}()
dc, err := discovery.NewDiscoveryClientForConfig(cfg)
if err != nil {
return nil, fmt.Errorf("failed to initialize discovery client: %s", err)
}
mapper := restmapper.NewDeferredDiscoveryRESTMapper(memory.NewMemCacheClient(dc))
dyn, err := dynamic.NewForConfig(cfg)
if err != nil {
return nil, fmt.Errorf("failed to initialize dynamic client: %s", err)
}
k8sEnv = &K8sTestEnv{
Client: k8sManager.GetClient(),
DynClient: dyn,
RestMapper: mapper,
Rest: cfg,
Stop: func() {
err := testEnv.Stop()
if err != nil {
log.Fatal(err.Error())
}
},
}
return k8sEnv, nil
}
// MakeFakeLogr returns an API compliant logr object that can be used for unit testing.
func MakeFakeLogr() (logr.Logger, *fakelogr.LogSink) {
sink := &fakelogr.LogSink{}
sink.WithValuesStub = func(i ...interface{}) logr.LogSink {
return sink
}
sink.EnabledStub = func(i int) bool {
return true
}
return logr.New(sink), sink
}
func Setenv(k, v string) func() {
prev := os.Environ()
os.Setenv(k, v)
return func() {
os.Unsetenv(k)
for _, kv := range prev {
parts := strings.SplitN(kv, "=", 2)
os.Setenv(parts[0], parts[1])
}
}
}
// MakeRSAPrivateKey generates and returns an RSA Private Key.
func MakeRSAPrivateKey(t *testing.T) *rsa.PrivateKey {
t.Helper()
k, err := rsa.GenerateKey(rand.Reader, 4096)
if err != nil {
t.Fatal(err)
}
return k
}
// MakeJWToken creates and signs a token with the provided key.
func MakeJWToken(t *testing.T, key *rsa.PrivateKey, email string) string {
t.Helper()
signer, err := jose.NewSigner(jose.SigningKey{Algorithm: jose.RS256, Key: key}, nil)
if err != nil {
t.Fatal(err)
}
maxAgeSecondsAuthCookie := time.Second * 600
notBefore := time.Now().Add(-time.Second * 60)
claims := jwt.Claims{
Issuer: "http://127.0.0.1:5556/dex",
Subject: "testing",
Audience: jwt.Audience{"test-service"},
NotBefore: jwt.NewNumericDate(notBefore),
IssuedAt: jwt.NewNumericDate(notBefore),
Expiry: jwt.NewNumericDate(notBefore.Add(time.Duration(maxAgeSecondsAuthCookie))),
}
githubClaims := struct {
Groups []string `json:"groups"`
Email string `json:"email"`
PreferredUsername string `json:"preferred_username"`
}{
[]string{"testing"},
email,
"example",
}
signed, err := jwt.Signed(signer).Claims(claims).Claims(githubClaims).CompactSerialize()
if err != nil {
t.Fatal(err)
}
return signed
}
// MakeKeysetServer starts an HTTP server that can serve JSONWebKey sets.
func MakeKeysetServer(t *testing.T, key *rsa.PrivateKey) *httptest.Server {
t.Helper()
ts := httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
var keys jose.JSONWebKeySet
keys.Keys = []jose.JSONWebKey{
{
Key: key.Public(),
Use: "sig",
Algorithm: "RS256",
},
}
_ = json.NewEncoder(w).Encode(keys)
}))
t.Cleanup(ts.Close)
return ts
}