registry/rpc: re-enable error handling after NewSystemdUnitManage

registry/rpc/registrymux_test.go

@@ -17,6 +17,7 @@ package rpc
 import (
 	"io/ioutil"
 	"os"
+	"syscall"
 	"testing"
 
 	etcd "github.com/coreos/etcd/client"
@@ -89,19 +90,21 @@ func TestRegistryMuxUnitManagement(t *testing.T) {
 	}
 	defer os.RemoveAll(uDir)
 
+	if syscall.Geteuid() != 0 {
+		t.Skipf("non-root user cannot call systemd unit manager. skip.")
+	}
+	if info, err := os.Stat("/run/systemd/system"); err != nil || !info.IsDir() {
+		t.Skipf("systemd is not available. skip.")
+	}
+
 	state := &machine.MachineState{
 		ID:       "id",
 		PublicIP: "127.0.0.1",
 		Metadata: make(map[string]string, 0),
 	}
 	mgr, err := systemd.NewSystemdUnitManager(uDir, false)
 	if err != nil {
-		// NOTE: ideally we should fail with t.Fatalf(), but then it would always
-		// fail on travis CI, because apparently systemd dbus socket is not
-		// available there. So let's just skip the test for now.
-		// In the long run, we should find a way to test it correctly on travis.
-		// - dpark 20160812
-		t.Skipf("unexpected error creating systemd unit manager: %v", err)
+		t.Fatalf("unexpected error creating systemd unit manager: %v", err)
 	}
 
 	mach := machine.NewCoreOSMachine(*state, mgr)

ssh/known_hosts_test.go

@@ -19,6 +19,7 @@ import (
 	"io/ioutil"
 	"net"
 	"os"
+	"runtime"
 	"strconv"
 	"syscall"
 	"testing"
@@ -165,7 +166,13 @@ func TestWrongHostKeyFile(t *testing.T) {
 	// If run as root, drop privileges temporarily
 	if id := syscall.Geteuid(); id == 0 {
 		if err := syscall.Setuid(12345); err != nil {
-			t.Fatalf("error setting uid: %v", err)
+			if runtime.GOOS == "linux" {
+				// On Linux syscall.Setuid is not supported, so we should not fail
+				// the test, but just skip for now. - dpark 20161021
+				t.Skipf("error setting uid: %v", err)
+			} else {
+				t.Fatalf("error setting uid: %v", err)
+			}
 		}
 		defer syscall.Setuid(id)
 	}