Fix String() for some option types

and add unit tests for them.

Signed-off-by: Daniel Nephin <dnephin@docker.com>
(cherry picked from commit c26e7d8c91)

api/client/service/opts.go

@@ -28,7 +28,7 @@ type int64Value interface {
 type memBytes int64
 
 func (m *memBytes) String() string {
-	return strconv.FormatInt(m.Value(), 10)
+	return units.BytesSize(float64(m.Value()))
 }
 
 func (m *memBytes) Set(value string) error {
@@ -48,7 +48,7 @@ func (m *memBytes) Value() int64 {
 type nanoCPUs int64
 
 func (c *nanoCPUs) String() string {
-	return strconv.FormatInt(c.Value(), 10)
+	return big.NewRat(c.Value(), 1e9).FloatString(3)
 }
 
 func (c *nanoCPUs) Set(value string) error {
@@ -191,14 +191,14 @@ func (m *MountOpt) Set(value string) error {
 		case "writable":
 			mount.Writable, err = strconv.ParseBool(value)
 			if err != nil {
-				return fmt.Errorf("invalid value for writable: %s", err.Error())
+				return fmt.Errorf("invalid value for writable: %s", value)
 			}
 		case "bind-propagation":
 			mount.BindOptions.Propagation = swarm.MountPropagation(strings.ToUpper(value))
 		case "volume-populate":
 			volumeOptions().Populate, err = strconv.ParseBool(value)
 			if err != nil {
-				return fmt.Errorf("invalid value for populate: %s", err.Error())
+				return fmt.Errorf("invalid value for populate: %s", value)
 			}
 		case "volume-label":
 			setValueOnMap(volumeOptions().Labels, value)
@@ -235,7 +235,8 @@ func (m *MountOpt) Type() string {
 func (m *MountOpt) String() string {
 	mounts := []string{}
 	for _, mount := range m.values {
-		mounts = append(mounts, fmt.Sprintf("%v", mount))
+		repr := fmt.Sprintf("%s %s %s", mount.Type, mount.Source, mount.Target)
+		mounts = append(mounts, repr)
 	}
 	return strings.Join(mounts, ", ")
 }

api/client/service/opts_test.go

@@ -0,0 +1,137 @@
+package service
+
+import (
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/docker/engine-api/types/swarm"
+)
+
+func assertEqual(t *testing.T, actual, expected interface{}) {
+	if expected != actual {
+		t.Fatalf("Expected '%v' (%T) got '%v' (%T)", expected, expected, actual, actual)
+	}
+}
+
+func assertNilError(t *testing.T, err error) {
+	if err != nil {
+		t.Fatalf("Expected no error, got: %s", err.Error())
+	}
+}
+
+func assertError(t *testing.T, err error, contains string) {
+	if err == nil {
+		t.Fatalf("Expected an error, but error was nil")
+	}
+
+	if !strings.Contains(err.Error(), contains) {
+		t.Fatalf("Expected error to contain '%s', got '%s'", contains, err.Error())
+	}
+}
+
+func TestMemBytesString(t *testing.T) {
+	var mem memBytes = 1048576
+	assertEqual(t, mem.String(), "1 MiB")
+}
+
+func TestMemBytesSetAndValue(t *testing.T) {
+	var mem memBytes
+	assertNilError(t, mem.Set("5kb"))
+	assertEqual(t, mem.Value(), int64(5120))
+}
+
+func TestNanoCPUsString(t *testing.T) {
+	var cpus nanoCPUs = 6100000000
+	assertEqual(t, cpus.String(), "6.100")
+}
+
+func TestNanoCPUsSetAndValue(t *testing.T) {
+	var cpus nanoCPUs
+	assertNilError(t, cpus.Set("0.35"))
+	assertEqual(t, cpus.Value(), int64(350000000))
+}
+
+func TestDurationOptString(t *testing.T) {
+	dur := time.Duration(300 * 10e8)
+	duration := DurationOpt{value: &dur}
+	assertEqual(t, duration.String(), "5m0s")
+}
+
+func TestDurationOptSetAndValue(t *testing.T) {
+	var duration DurationOpt
+	assertNilError(t, duration.Set("300s"))
+	assertEqual(t, *duration.Value(), time.Duration(300*10e8))
+}
+
+func TestUint64OptString(t *testing.T) {
+	value := uint64(2345678)
+	opt := Uint64Opt{value: &value}
+	assertEqual(t, opt.String(), "2345678")
+
+	opt = Uint64Opt{}
+	assertEqual(t, opt.String(), "none")
+}
+
+func TestUint64OptSetAndValue(t *testing.T) {
+	var opt Uint64Opt
+	assertNilError(t, opt.Set("14445"))
+	assertEqual(t, *opt.Value(), uint64(14445))
+}
+
+func TestMountOptString(t *testing.T) {
+	mount := MountOpt{
+		values: []swarm.Mount{
+			{
+				Type:   swarm.MountType("BIND"),
+				Source: "/home/path",
+				Target: "/target",
+			},
+			{
+				Type:   swarm.MountType("VOLUME"),
+				Source: "foo",
+				Target: "/target/foo",
+			},
+		},
+	}
+	expected := "BIND /home/path /target, VOLUME foo /target/foo"
+	assertEqual(t, mount.String(), expected)
+}
+
+func TestMountOptSetNoError(t *testing.T) {
+	var mount MountOpt
+	assertNilError(t, mount.Set("type=bind,target=/target,source=/foo"))
+
+	mounts := mount.Value()
+	assertEqual(t, len(mounts), 1)
+	assertEqual(t, mounts[0], swarm.Mount{
+		Type:   swarm.MountType("BIND"),
+		Source: "/foo",
+		Target: "/target",
+	})
+}
+
+func TestMountOptSetErrorNoType(t *testing.T) {
+	var mount MountOpt
+	assertError(t, mount.Set("target=/target,source=/foo"), "type is required")
+}
+
+func TestMountOptSetErrorNoTarget(t *testing.T) {
+	var mount MountOpt
+	assertError(t, mount.Set("type=VOLUME,source=/foo"), "target is required")
+}
+
+func TestMountOptSetErrorInvalidKey(t *testing.T) {
+	var mount MountOpt
+	assertError(t, mount.Set("type=VOLUME,bogus=foo"), "unexpected key 'bogus'")
+}
+
+func TestMountOptSetErrorInvalidField(t *testing.T) {
+	var mount MountOpt
+	assertError(t, mount.Set("type=VOLUME,bogus"), "invalid field 'bogus'")
+}
+
+func TestMountOptSetErrorInvalidWritable(t *testing.T) {
+	var mount MountOpt
+	assertError(t, mount.Set("type=VOLUME,writable=yes"), "invalid value for writable: yes")
+}