rbd admin: add a test to cover the Status function

This is a complex test as it requires the pool and an image before it
will return any (non empty) data.

Signed-off-by: John Mulligan <jmulligan@redhat.com>

rbd/admin/msschedule_complex_test.go

@@ -0,0 +1,77 @@
+// +build !nautilus
+
+package admin
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/ceph/go-ceph/rbd"
+)
+
+func TestMirrorSnapshotScheduleStatus(t *testing.T) {
+	// note: the status function doesn't return anything "useful" unless
+	// there's an image in the pool. thus we require an image first.
+	ensureDefaultPool(t)
+	conn := getConn(t)
+
+	ioctx, err := conn.OpenIOContext(defaultPoolName)
+	require.NoError(t, err)
+	defer ioctx.Destroy()
+
+	imgName := "img1"
+	options := rbd.NewRbdImageOptions()
+	assert.NoError(t,
+		options.SetUint64(rbd.ImageOptionOrder, uint64(testImageOrder)))
+	err = rbd.CreateImage(ioctx, imgName, testImageSize, options)
+	assert.NoError(t, err)
+	defer func() {
+		assert.NoError(t, rbd.RemoveImage(ioctx, imgName))
+	}()
+	img, err := rbd.OpenImage(ioctx, imgName, rbd.NoSnapshot)
+	assert.NoError(t, err)
+	err = img.MirrorEnable(rbd.ImageMirrorModeSnapshot)
+	assert.NoError(t, err)
+	assert.NoError(t, img.Close())
+
+	ra := getAdmin(t)
+	scheduler := ra.MirrorSnashotSchedule()
+	err = scheduler.Add(
+		NewLevelSpec(defaultPoolName, "", imgName),
+		Interval("1d"),
+		NoStartTime)
+	assert.NoError(t, err)
+	defer func() {
+		err = scheduler.Remove(
+			NewLevelSpec(defaultPoolName, "", imgName),
+			Interval("1d"),
+			NoStartTime)
+		assert.NoError(t, err)
+	}()
+
+	// This is one of those calls that depends on something async inside ceph
+	// and doesn't return the "expected result" immediately after the schedule
+	// is added. Loop on it for a while checking for the desired condition to
+	// become true.
+	// Unfortunately, this particular case is quite slow and doesn't
+	// seem to be ready until around a minute(!).
+	var status []ScheduledImage
+	for i := 0; i < 100; i++ {
+		status, err = scheduler.Status(
+			NewLevelSpec(defaultPoolName, "", imgName))
+		assert.NoError(t, err)
+		if len(status) == 1 {
+			break
+		}
+		time.Sleep(1 * time.Second)
+	}
+	if assert.Len(t, status, 1) {
+		assert.Equal(t, "rbd/img1", status[0].Image)
+		// we don't bother asserting the ScheduleTime value because
+		// it changes - and it's not worth messing with the system
+		// clock just for this kind of test.
+	}
+}