func (s *testPrefixSuite) TestCode(c *C) {
table := []struct {
prefix string
h int64
ID int64
}{
{"123abc##!@#((_)((**&&^^%$", 1234567890, 0},
{"", 1, 0},
{"", -1, 0},
{"", -1, 1},
}
for _, t := range table {
b := EncodeRecordKey(t.prefix, t.h, t.ID)
handle, err := DecodeHandleFromRowKey(string(b))
c.Assert(err, IsNil)
c.Assert(handle, Equals, t.h)
}
b1 := EncodeRecordKey("aa", 1, 0)
b2 := EncodeRecordKey("aa", 1, 1)
c.Logf("%#v, %#v", b2, b1)
raw, err := codec.StripEnd(b1)
c.Assert(err, IsNil)
f := hasPrefix(raw)
has := f(b2)
c.Assert(has, IsTrue)
}
// RowKeyPrefixFilter returns a function which checks whether currentKey has decoded rowKeyPrefix as prefix.
func RowKeyPrefixFilter(rowKeyPrefix []byte) kv.FnKeyCmp {
return func(currentKey kv.Key) bool {
// Next until key without prefix of this record.
raw, err := codec.StripEnd(rowKeyPrefix)
if err != nil {
return false
}
return !bytes.HasPrefix(currentKey, raw)
}
}