cache : add cache service (#457)

Signed-off-by: Bobby DeSimone <bobbydesimone@gmail.com>

internal/grpc/server_test.go

@@ -0,0 +1,84 @@
+package grpc
+
+import (
+	"encoding/base64"
+	"os"
+	"os/signal"
+	"sync"
+	"syscall"
+	"testing"
+	"time"
+
+	"github.com/pomerium/pomerium/internal/cryptutil"
+	"google.golang.org/grpc"
+)
+
+const privKey = `-----BEGIN EC PRIVATE KEY-----
+MHcCAQEEIMQiDy26/R4ca/OdnjIf8OEDeHcw8yB5SDV9FD500CW5oAoGCCqGSM49
+AwEHoUQDQgAEFumdSrEe9dnPEUU3LuyC8l6MM6PefNgpSsRL4GrD22XITMjqDKFr
+jqJTf0Fo1ZWm4v+Eds6s88rsLzEC+cKLRQ==
+-----END EC PRIVATE KEY-----`
+const pubKey = `-----BEGIN CERTIFICATE-----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=
+-----END CERTIFICATE-----`
+
+func TestNewServer(t *testing.T) {
+	certb64, err := cryptutil.CertifcateFromBase64(
+		base64.StdEncoding.EncodeToString([]byte(pubKey)),
+		base64.StdEncoding.EncodeToString([]byte(privKey)))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	tests := []struct {
+		name           string
+		opt            *ServerOptions
+		registrationFn func(s *grpc.Server)
+		wg             *sync.WaitGroup
+		wantNil        bool
+		wantErr        bool
+	}{
+		{"simple", &ServerOptions{Addr: ":0"}, func(s *grpc.Server) {}, &sync.WaitGroup{}, false, false},
+		{"bad tcp port", &ServerOptions{Addr: ":9999999"}, func(s *grpc.Server) {}, &sync.WaitGroup{}, true, true},
+		{"with certs", &ServerOptions{Addr: ":0", TLSCertificate: certb64}, func(s *grpc.Server) {}, &sync.WaitGroup{}, false, false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := NewServer(tt.opt, tt.registrationFn, tt.wg)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("NewServer() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if (got == nil) != tt.wantNil {
+				t.Errorf("NewServer() = %v, want %v", got, tt.wantNil)
+			}
+			if got != nil {
+				// simulate a sigterm and cleanup the server
+				c := make(chan os.Signal, 1)
+				signal.Notify(c, syscall.SIGINT)
+				defer signal.Stop(c)
+				go Shutdown(got)
+				syscall.Kill(syscall.Getpid(), syscall.SIGINT)
+				waitSig(t, c, syscall.SIGINT)
+			}
+		})
+	}
+}
+
+func waitSig(t *testing.T, c <-chan os.Signal, sig os.Signal) {
+	select {
+	case s := <-c:
+		if s != sig {
+			t.Fatalf("signal was %v, want %v", s, sig)
+		}
+	case <-time.After(1 * time.Second):
+		t.Fatalf("timeout waiting for %v", sig)
+	}
+}