ObjectSizeLessThan    int64    `xml:"ObjectSizeLessThan,omitempty"`
	Prefix                Prefix   `xml:"Prefix,omitempty"`
	Tags                  []Tag    `xml:"Tag,omitempty"`
}

// isEmpty returns true if Tags field is null
func (a And) isEmpty() bool {
	return len(a.Tags) == 0 && !a.Prefix.set &&
		a.ObjectSizeGreaterThan == 0 && a.ObjectSizeLessThan == 0
}

	}
	f2 = Filter{}
	err = xml.Unmarshal(b, &f2)
	if err != nil {
		t.Fatalf("Failed to unmarshal %s", string(b))
	}
	if f1.And.ObjectSizeLessThan != f2.And.ObjectSizeLessThan {
		t.Fatalf("Expected %v but got %v", f1.And.ObjectSizeLessThan, f2.And.ObjectSizeLessThan)
	}
	if f1.And.ObjectSizeGreaterThan != f2.And.ObjectSizeGreaterThan {

		if err := e.EncodeElement(f.Prefix, xml.StartElement{Name: xml.Name{Local: "Prefix"}}); err != nil {
			return err
		}

		if f.ObjectSizeLessThan > 0 {
			if err := e.EncodeElement(f.ObjectSizeLessThan, xml.StartElement{Name: xml.Name{Local: "ObjectSizeLessThan"}}); err != nil {
				return err
			}
		}
		if f.ObjectSizeGreaterThan > 0 {

	                    </Rule>`,
			expectedErr: errInvalidRuleStatus,
		},
		{ // Rule with negative values for ObjectSizeLessThan
			inputXML: `<Rule>
				<ID>negative-obj-size-less-than</ID>
				<Filter><ObjectSizeLessThan>-1</ObjectSizeLessThan></Filter>
				<Expiration>
					<Days>365</Days>
				</Expiration>
                            <Status>Enabled</Status>
	                    </Rule>`,

			Expiration: Expiration{
				set:  true,
				Days: 1,
			},
		},
		{
			ID:     "rule-with-sz-lt",
			Status: "Enabled",
			Filter: Filter{
				set:                true,
				ObjectSizeLessThan: 100 * humanize.MiByte,
			},
			Expiration: Expiration{
				set:  true,
				Days: 1,
			},
		},
		{
			ID:     "rule-with-sz-gt",
			Status: "Enabled",
			Filter: Filter{