common/daemon: test if sending SIGINT terminates the component

common/daemon/root_test.go

@@ -5,8 +5,10 @@ package daemon
 
 import (
 	"errors"
+	"syscall"
 	"testing"
 	"testing/synctest"
+	"time"
 
 	"gopkg.in/tomb.v2"
 
@@ -43,6 +45,23 @@ func TestTerminate(t *testing.T) {
 	c.Terminate() // Can be called several times.
 }
 
+func TestTerminateWithSignal(t *testing.T) {
+	r := reporter.NewMock(t)
+	c, err := New(r)
+	if err != nil {
+		t.Fatalf("New() error:\n%+v", err)
+	}
+	helpers.StartStop(t, c)
+
+	syscall.Kill(syscall.Getpid(), syscall.SIGINT)
+	select {
+	case <-c.Terminated():
+		// OK
+	case <-time.After(time.Second):
+		t.Fatalf("Terminated() wasn't closed while we requested it to be")
+	}
+}
+
 func TestStop(t *testing.T) {
 	r := reporter.NewMock(t)
 	c, err := New(r)