t.Errorf("IsCompressed: Expected %v but received %v",
					test.result, got)
			}
			got, gErr := test.objInfo.IsCompressedOK()
			if got != test.result {
				t.Errorf("IsCompressedOK: Expected %v but received %v",
					test.result, got)
			}
			if gErr != nil != test.err {
				t.Errorf("IsCompressedOK: want error: %t, got error: %v", test.err, gErr)
			}
		})
	}
}

// Tests excludeForCompression.

func (o *ObjectInfo) IsCompressed() bool {
	_, ok := o.UserDefined[ReservedMetadataPrefix+"compression"]
	return ok
}

// IsCompressedOK returns whether the object is compressed and can be decompressed.
func (o *ObjectInfo) IsCompressedOK() (bool, error) {
	scheme, ok := o.UserDefined[ReservedMetadataPrefix+"compression"]
	if !ok {
		return false, nil
	}
	switch scheme {